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8/21/2019 Standard SKF
1/88
Roller screws
8/21/2019 Standard SKF
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Se
Hi
Gl
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General
Other technical dataLead precision according to ISO ---------------------------------------------------------------Preload adjustment --------------------------------------------------------------------------------Product inspection and certification ----------------------------------------------------------
GeneralOverview: roller screw nuts ---------------------------------------------------------------------Comparing roller screws to ball screws ------------------------------------------------------The principle of planetary roller screws -----------------------------------------------------The principle of recirculating roller screws -------------------------------------------------
Recommendations for selectionBasic and static load rating ---------------------------------------------------------------------
Critical rotating speed for screw shafts ------------------------------------------------------Permissible speed limit --------------------------------------------------------------------------Lubrication ------------------------------------------------------------------------------------------Efficiency and back-driving ---------------------------------------------------------------------Axial play and preload ----------------------------------------------------------------------------Static axial stiffness --------------------------------------------------------------------------------Screw shaft buckling ------------------------------------------------------------------------------Materials and heat treatments -----------------------------------------------------------------Shaft design -----------------------------------------------------------------------------------------
Recommendations for assemblyRadial and moment loads -----------------------------------------------------------------------Alignment --------------------------------------------------------------------------------------------Lubrication -------------------------------------------------------------------------------------------Designing the screw shaft ends ---------------------------------------------------------------Starting-up the screw ---------------------------------------------------------------------------Operating temperature --------------------------------------------------------------------------
Rollingelement
Load CoØ
d
Product informationService Range Capabilities -------------------------------------------------------------------------------------------Range details ----------------------------------------------------------------------------------------Flanged thrust bearings, FLRBU --------------------------------------------------------------
Standard Range Pl t ll t h i l d t d di i
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General
Overview
nuts for r
Planetary roller screws
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General
TRU/PRUCylindrical backlash elimination: TRU Preloaded: PRU
SRC, Cylindrical axial play BRC, backlash elimination
TRK/PRK Flanged backlash elimination: TRK Preloaded: PRK
SRF, Flanged axial playBRF, backlash elimination
PVU Cylindrical preloaded
SVC, Cylindrical axial play BVC, backlash elimination
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General
The load carrying capacity of arolling screw depends practicallyon the surfaces at the points ofcontact:
n their diametern the number of contactsn their hardnessn their surface fi nish
n the preassurethem.
Comparing roller screws to ball screws
Roller screws
In roller screws, the load is transmitted from the nubarrelled surfaces of all the engaged rollers. The diameter of the contact surface is substantially of points of contact.
2 types of roller screws
Planetary roller screwThreaded rollers are the basis of“SR / BR / TR / PR” planetary roller screws.
RecirculatinGrooved roll“SV /BV / PV
Contact surfaces
Diameter
Number
Hardness
Surface finish
Precision
Load rating
EE===
E E
=====
=
Ball screws
In ball screws, the load is transmittedfrom the nut to the shaft through theballs engaged in the groove.
In a single start ball screw, the balldiameter is limited to approximately70 % of the lead: there is only a singlehelix of balls in a nut of given lengthso the number of contacts is small.
8/21/2019 Standard SKF
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General
Higheracceleration over
12 000 rad/sec2
Stainless steels
Higher statload up to1000 tonne
Hiloa20
Higher rospeed Ø 4over 300
Shock loads
Adverseenvironmentsdust, ice, sand
1 mm Lead
SRSV SRSV
SV
SR
SRSR
SR
SR
SV
Break out from the limitations of
ball screw performance
The 10 reasonsfor using roller screws
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Many strong contact surfaces High load carrying capacity
No recirculation and no contact No weak points in the nut between rolling elements High rotation speed
Guided rollers No loss in preload torque when changing direction
Timing mechanism Exceptional reliability
Adaptable tooling Non standard and left hand leads available
All parts made “in house”, special steels possible
General
The capacity to carry heavy loadsf th d f h i th
Examples:Pl ti ldi
The principle of planetary roller screws
Threaded rSR/BR/TR/
fig. 1
The specific qualities of SKF planetary roller screws
Typical applications
G l
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General
Ultimate positioning accuracy canb bt i d i th fi l d
Examples:G i di hi
The principle of recirculating roller screws
Grooved rollerrecirculating r
fig. 1
The specific qualities of SKF recirculating roller screws
Very small leads (1mm) Fine resolution Minimum drive torque High m
No miniature parts Simple Robust Reliab
Many strong contact Heavy load High rigidity Long
points carrying capacity
All parts made “in house”, special steels possible
Typical applications
R d ti f l ti
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Recommendations for selection
Basic dynamic loadrating (Ca)
The dynamic rating is used tocompute the fatigue life of roller
screws. It is the axial load cons-tant in magnitude and direction,and acting centrally under whichthe nominal life (as defi ned byISO) reaches one million revolu-tions.
Nominal fatigue life L10The nominal life of a roller screwis the number of revolutions(or the number of operatinghours at a given constant speed)which the roller screw is capableof enduring before the fi rst signof fatigue (fl aking, spalling) occurson one of the rolling surfaces
(screw, nut or roller thread orgroove).
It is however evident fromboth laboratory tests and practi-cal experience that seeminglyidentical roller screws operatingunder identical conditions have
different lives, hence the notion ofnominal life. It is, in accordance with ISO
defi nition, the life achieved orexceeded by 90 % of a suffi cientlylarge group of apparently identi-cal roller screws, working in iden-tical conditions (alignment, axial
and centrally applied load, speed,acceleration, lubrication, tempe-rature and cleanliness).
Service It is the aspecifi c rFailure is(fl aking oinadequawear of tcorrosion
more genfunctionaby the ap
Expersimilar apselect thethe requimust tak
requiremof screw ments, duthe elemL10 life pworking is permit
Recommendations for selection
Only basic selection parameters are included. To make the verybest selection of a roller screw, the designer should specify suchcritical parameters as the load spectrum, the linear or rotationalspeed, the rates of acceleration and deceleration, the cycle rate,the environment, the required life, the lead accuracy, the stiffness,and any special requirement. If in doubt, please consult an SKFspecialist before placing an order.
In cases where more than 90 %
Recommendations for selection
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Recommendations for selection
Equivalent dynamic loadsThe loads acting on the screwcan be calculated according to the
laws of mechanics if the externalforces (e.g. power transmission,work, rotary and linear inertiaforces) are known or can be cal-culated. It is necessary to calcula-te the equivalent dynamic load(see page 84). Radial and moment loadsmust be taken by linear guidingsystems. It is extremely importantto resolve these problems at theearliest conceptual stage. Theseforces are detrimental to the lifeand the expected performance ofthe screw.
Fluctuating load
When the load fl uctuates duringthe working cycle, it is necessaryto calculate the equivalent dyna-mic load: this load is defi ned asthat hypothetical load, constant inmagnitude and direction, actingaxially and centrally on the screwwhich, if applied, would have thesame infl uence on the screw lifeas the actual loads to which thescrew is subjected.
Additional loads due, forexample to misalignment, unevenloading, shocks, and so on, must
be taken in account.Their infl uence on the nominallife of the screw is generally takencare of, consult SKF for advice.
Static load carryingcapacity (Coa)
Roller screws should be selectedon the basis of the static loadrating Coa instead of on life whenthey are submitted to continuousor intermittent shock loads, whilestationary or rotating at very lowspeed for short duration.
The permissible load is deter-mined by the permanent defor-mation caused by the load actingat the contact points.
It is defi ned by ISO standardsas the purely axially and centrallyapplied static load which willcreate, by calculation, a total (rol-
ling element + thread surface)permanent deformation equal to0.0001 of the diameter of curva-ture of the rolling element. Thisdeformation corresponds to acontact Hertz stress up to 4500MPa depending on the screw dia-meter.
The roller screw must beselected by its basic static loadrating which must be, at least,equal to the product of the maxi-mum axial static load applied anda safety factor “so”.
The safety factor is selected inrelation with past experience of
similar applications and require-ments of running smoothnessand noise level (1).
Critical rfor screw
The shaft isthe diametediameter ofmulas (seemeter the vdictated by screw shaft
supported oAs a ruledered as a sshaft. Becauinaccuraciesthe screw ator of 0.80 culated criti
Calculatithe nut as aor reduce thre practical optimization
Recommendations for selection
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Recommendations for selection
Permissible speed limit
The permissible speed limit isthat speed which a screw cannotreliably exceed at any time. It isgenerally the limiting speed ofthe centrifugal forces in the nut.It is expressed as the product ofthe rpm and the diameter of thescrew shaft (in mm). The speed limits quoted in thiscatalogue (see page 84) are themaximum speed that may beapplied through very short periods and in optimized running condi-tions of alignment, light externalload and preload with monitoredlubrication.
Running a screw continuouslyat the permissible speed limitmay lead to a reduction of thecalculated life of the nut mecha-nism.
High speed associated withhigh load requires a large inputtorque and yields a relativelyshort nominal life (1). In the case of high accelera-tion and deceleration, it is recom-mended to either work under anominal external load or to apply
a light preload to the nut to avoidinternal sliding during reversal.The value of the preload of
screws submitted to high accele-ration is that preload whichensures the rolling elements do
Lubrication
The key point is the initial lubri-cation of the nut to lubricate allcomponents. The lubrication ofscrews rotating at high speedmust be properly considered inquantity and quality.
The volume, spread and fre-quency of the application of thelubricant (oil or grease) must beproperly selected and monitored.At high speed the lubricantspread on the surface of thescrew shaft may be thrown off bycentrifugal forces. It is important
to monitor this phenomenonduring the fi rst run at high speedand possibly adapt the frequencyof re-lubrication or the fl ow oflubricant, or select a lubricantwith a higher viscosity.
Monitoring the steady tempe-rature reached by the nut permits
the frequency of re-lubrication orthe oil fl ow rate to be optimized.
Oil lubr
A centraloil systemcontinuothe nut wfrom the prescribeis likely taccuracy. regulatedkness an
SelectionMineral olubricate such as bmay be u
viscosity the speedand load.a viscositrunning tin viscosithe runnispeed (<
should bening temload an Ethe fi lm ded. Corrstabilizinused to a Synth
advised frature. Bariumheavy loaadhesion
!
Recommendations for selection
8/21/2019 Standard SKF
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Recommendations for selection
Grease lubrication
Where oil lubrication is not prac-ticable, the grease recommendedfor the support bearings of thescrew may also be used for thescrew. After a few full strokes thegrease will be spread evenly overthe useful threaded length ofthe screw shaft, which will alsohelp to protect the screw againstcorrosion. However the grease isopen to the air.
To prevent dirt which mayfall on it from entering the nut,wipers should be mounted ineach end of the nut. Also thegrease on the screw shaft willage more quickly than that in thescrew support bearings so morefrequent regreasing is needed,especially in a dirty environment.If the screw cannot be dis-mounted and cleaned beforeregreasing it is necessary tothoroughly clean the old grease
from the screw shaft. This canbe done with a spatula and thenwith a clean fl uff proof cloth.To clean even more a cloth wet-ted with a solvent such as whitespirit may be used. We do notadvise using brushes to removeold or spread new grease (risk of
bristles coming out). Apply alsothe new grease through the nutto push out the old from insidethe nut. The grease type is defi nedabove all by the operating tem-
Selection of greaseLithium base greases, for stan-dard applications with EP-additi-
ves, are generally suitable for usefrom –30 °C to +110 °C.
A few can be used to +150 °CLithium base greases are virtuallyinsoluble in water and very workstable. However they absorblarge quantities of water whenworked to extremes.
Lubrication intervalThe lubrication interval dependson the working cycle of the screwand whether the lubricant is pol-luted during use. General adviceis diffi cult but the following willhelp you to defi ne the interval.On start up check the greasequality regularly, for instanceevery month. The fi rst re-lubrication has tobe done after roughly 50 000revolutions under load, toremove all particles generatedduring running-in. If the viscosity of the greasesample has increased, it needsreplacing. If the grease sample is darkerthan new it may indicate oxida-tion or the presence of metallicparticles.
If it is discoloured, it is proba-bly mixed with water. It is helpful to take samplesnot only from the part of thescrew where running has occu-red but also from unused partsf h h h
Recommendations for selection
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Recommendations for selection
Quantity of lubricant
• OilWe advise a quantity of5 › 25 cm3/h in shots of 0,1 cm3 as an order of magnitude depen-ding on the size of the screw andits running conditions.
• GreaseThe total volume of grease nee-ded for a new roller screw is thesum of the quantities needed forthe screw shaft and the nut. The volume of grease neces-sary for the screw shaft Zs canbe estimated from this formula:
This quantity of greaseshould be spread over the wholethreaded length of the shaft. The
volume of grease for the nut Zn is one third of the free volume inthe nut.
The quantity Zn is given in thedimension tables: it should beinjected through the lubricationhole while turning the shaft. Before applying load the nut
should be run twice along thecomplete stroke to ensure greaseis evenly spread.
Relubrication, see also ‘Greaselubrication’
Efficiency and back-driving
The performance of a screw ismainly dependant on the geo-metry of the contact surfaces andtheir fi nish as well as the helixangle of the thread.
It is, also, dependant on theworking conditions of the screw(load, speed, lubrication, preload,alignment, etc…). The “direct effi ciency” is usedto defi ne the input torque requi-red to transform the rotation ofone member into the translationof the other. Conversely, the“indirect effi ciency” is used todefi ne the axial load required to
transform the translation of onemember into the rotation of theother one. It is used, also, to defi -ne the braking torque required toprevent that rotation. These screws are reversible orback-driveable under almost allcircumstances. It is therefore
necessary to design a brakemechanism if backdriving is to beavoided (gear reducers or brake).
Preload t
Internallybit a torq
This persnot extertorque is when assISO grad
Starting
This is de
ded to ovstart rotaa) the totparts accsource (inlinear mob) the intscrew/nuassociate In geninertia (atorque (b The cothe high starting µdouble thunder no
Zs = 4,4 ™ 10
-4 d0l1
Recommendations for selection
8/21/2019 Standard SKF
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Recommendations for selection
Axial play and preload
Preloaded nuts are subject tomuch less elastic deformationthan non-preloaded nuts.
Therefore they should be usedwhenever the accuracy of positio-ning under load and stiffness areimportant.
Preload, preload torqueand rigidity
When a roller screw with a wholenut with axial play is measuredon a tensile testing machine, agraph similar to (fi g. 1) is obtai-ned. One objective of preloadingis to eliminate the axial play sothat positioning accuracy isimproved when the external loadchanges direction.
Planetary roller screws areavailable with play eliminationusing whole nut (designation: BR)or split nut (designation: TR). In this case the preload torquewill be between 0 and Tpe measu-red at 50 rpm when lubricatedwith ISO grade 68 oil.
Planetary and recirculatingroller screws are also availablepreloaded for optimum rigidity:their designations are PR and PV.(fi g. 2) shows how a squeeze loadFq is applied to the nut halves 1and 2 of a split nut to obtain apreload Fpr . One part of this loadis used to generate the preloadf d h h
When an external load F (fi g. 3) isapplied the loads on the nut hal-ves become F1 and F2.
For all conditions whereF ≤ 2,83 Fpr the load seen by nuthalf 2 is greater than the externalload so increasing the preloadreduces the life of the screw.When the external load reaches2,83 Fpr nut half 1 is unloadedand F2 = F. Roller screws are
normally preloaded by preloadingone nut half against the other soonly one half supports the exter-nal load in a given direction. Inthis case, nut half 2 is taking theexternal load. The load carryingcapacity and rigidity of a splitpreloaded nut are substantiallyless than a whole nut.
Because of the very high loadcapacity and rigidity of rollerscrews a split nut is suffi cient formost applications and offers anextremely compact design.
-- 1- 20- 30
-
- 1
- 1
1
1
fig. 1
Fq
Fpr
fig. 2
Fq
F1
fig. 4
fig. 3
Recommendations for selection
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Recommendations for selection
Figure 5 compares the load/defl ection characteristics of threedifferent nut combinations:
Curve 1. Whole nut with axialplay
Curve 2. Preloaded split nutCurve 3. Preloaded double nut. Backlash elimination can beachieved by fi tting oversize rollersin one-piece nut (BRC-BVC)which allows to keep high load
capacities. In exceptional cases where theload rating of a split nut is notsuffi cient two whole cylindricalnuts may be preloaded together(fi g. 6). Exact dimensions areavailable on request: please con-tact SKF.
The squeeze load applies acompressive preload in all cases:this ensures more rigidity of the
roller screw compared to a pre-load in extension. Preload torque is the torqueresulting from the preload, Fpr.The preload torque is calculatedfrom the nominal preload assu-ming a real effi ciency of 90 % ofthe theoretical direct effi ciency
(page 85).
The prelo
+
10000
15000
LoadN 3 1
2
fig. 6fig. 5
Tpr = F
Recommendations for selection
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Preload torque tolerancesFor each roller screw, preloadedfor optimum rigidity a range of
value of preload torque , Tpr isgiven in the technical data. Thecustomer is free to choose anyvalue in this range: if no value isspecifi ed on the order the meanvalue will be taken. A typical pre-load torque graph is shown onpage 18: they can be obtained on
request when ordering. The reference Rnr value ofrigidity correspond to this meanpreload torque value.
The tolerance of variation ofpreload torque as the nut movesalong the length of the screwdepends on the helix angle of thescrew thread, the slenderness ofthe screw shaft and the lead pre-cision. The tables give the tole-rances of preload torquevariation. Refer to A if the helixangle, a is less than 11° and B ifit is more. Preload torque is measured at50 rpm with ISO grade 68 oil forSR/TR/PR screws and with ISOgrade 220 oil for SV/PV screws.
A. Tolerance of preload torque for screws with a < 1
l1/d0 ≤ 40 and l1 ≤ 4000 l1/d Tpr G1 G3 G5 G Nm ±%
≤0,2 35 40 50 4 (0,2) - 0,6 25 30 35 3 (0,6) - 1,0 20 25 30 2 (1,0) - 2,5 15 20 25 2
(2,5) - 6,3 10 15 20 1 (6,3) - 10,0 10 10 15 1
B. Tolerance of preload torque for screws with a ≥ 1
l1 ≤ 2000 2000
Tpr G3 G5 G3 Nm ±%
0 - 10,0 70 80 80
Planetary roller screws preloaded for optimum rigidity wavailable in G1 lead precision.
Recommendations for selection
8/21/2019 Standard SKF
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Example:
A PRK 48 ™ 10 with threaded length 600 mm. The range of preloadtorque is 1,24 › 2,47 Nm. What is the tolerance of preload torque forG3 lead precision ?
The minimum guaranteed nut rigidity is 760 N/µm and the refe-rence value is 980 N/µm. To obtain these the mean value of preloadtorque is specified: 1,855 Nm. The helix angle a is 3,79°.
Table A gives ±20 % for G3. All screws will be within the tolerance
1,855 ±20 % or 1,484 › 2,226 Nm.
If for reasons of motor torque limitations the minimum preloadtorque 1,24 Nm is chosen. The tolerance becomes 1,24 ±20 % or0,99 › 1,49 Nm and the preload and minimum guaranteed and refe-rence values of rigidity are not valid.
Two typical examples are shown. 1,81,6
1,41,2
1,0
0,8
TprNm
0,2
fig. 2
2,42,2
2,0
1,8
1,6
1,4
1,2
1,0
TprNm
0,2
fig. 1
Recommendations for selection
8/21/2019 Standard SKF
19/88
Static axial stiffness of acomplete assembly
It is the ratio of the external axialload applied on the system andthe axial displacement of the faceof the nut in relation with thefi xed (anchored) end of the screwshaft. The inverse of the rigidityof the total system is equal to the
sum of all the inverses of therigidity of each of the compo-nents (screw shaft, nut as moun-ted on the shaft, supportingbearing, supporting housings,etc…).
Because of this, the rigidity ofthe total system is always lessthan the smallest individual rigi-
dity.
Nut rigidity: RnWhen a preload is applied to asplit nut, fi rstly, the internal playis eliminated, then, the Hertzianelastic deformation increases asthe preload applied so that the
overall rigidity increases. The theoretical deformationdoes not take into accountmachining inaccuracies, actualsharing of the load between thedifferent contact surfaces, the
Shaft rigidity: RsThe elastic deformation of screwshaft is proportional to its length
and inversely proportional to thesquare of the root diameter. According to the relativeimportance of the screw defor-mation (see rigidity of the totalsystem), too large an increase inthe preload of the nut and sup-porting bearings yields a limited
increase of rigidity and notablyincreases the preload torqueand therefore the running tem-perature.
Consequently, the preload sta-ted in the catalogue for eachdimension is optimum and shouldnot be increased.
for standard steelsee fi g. 1
for standard steelsee fi g. 2
Screw shThe columnshaft must bsubmitted t(whether dyly).
The maxcompressiveusing the Ethen multipof 3 to 5, deapplication.
Th t
fig. 2
fig. 1
1 = 1 + 1 Rt Rs Rn
d2
2
Rs = 165 ––– (N/µm)l
165 d22 l
Rs = ––––––––––––––l2 (l - l2)
Recommendations for selection
8/21/2019 Standard SKF
20/88
Materials and heattreatments
Standard screw shafts aremachined from pretreated42 CrMo4.
Standard nuts are machinedin 100Cr6 steel which is throughhardened. Hardness of the con-tact surfaces is 56-60 HRc. Most assemblies made ofstainless material have a surface
hardness in the range 42 to 58HRc: the load rating of the cata-logue therefore must be deratedrespectively to C’a and C’oaC’a and C’oa being the capacitieswith the new hardness in Vickers(Hv).
Working environment
Our products have not beendeveloped for use in an explosiveatmosphere, consequently wecannot take any responsibility for
their use in this fi eld.NOTE: 42 CrMo4, an AFNORreference is similar to AISI 4140;100Cr6 is similar to AISI 52100.
Shaft D
It is possiscrews wthe outsidshaft. To
ciently anmeter d2(fi g. 1).
• When d
SR/BR/TPh ≤ 8 m
Ph > 8 m
SV/BV/PVPh = 1+ 40 ™ 263 ™ 2
Through hardening treatment
Tensile strength,MPa
Yield stress(Rp 0,2 %)
850 MPa
650 Mpa up to12,5 mmradially fromoutside.550 MPa morethan 12,5 mmradially fromoutside.
Then the Transrol thread is surface
hardened by induction.
( Hv )
2
C’a = Ca ™ ––––– 654
( Hv )3
C’oa = Coa ™ ––––– Recommendations for selection
8/21/2019 Standard SKF
21/88
Zone A.Torsion only
The nominal shear stress t cau-sed by the drive torque T is givenby:
16 Tt = ––––––– p d5
3
This is increased by a stress con-centration factor f 4 to give thereal shear stress, tp
tp = f 4t
According to Von Mises the total
stress, st
st = 1,73 tp
For safety st should be less than67 % of the 0,2 % proof stress ofthe steel.
If the end diameter d5 inclu-
des a keyway of depth e calculatewith (d5 - e).
The angle of twist of the screwshaft is given by
0,0648 Tlq = ––––––––––
do4
The linear positioning error, d,caused by this twist
Ph q
Zone B.Axial + torsional stresses
The nominal axial stress causedby the axial load F is given by
4Fs = ––––– pd4
2
This is increased by a stress con-centration factor f 5 to give thereal principal stress sp
sp = f 5 s
as above
tp = f 4t
According to Von Mises the totalstress st
st = (sp2 + 3 tt
2)1/2
For safety st should be less than
67 % of the 0,2 % proof stress ofthe steel.
Strengthends
The end ma
screw is desmer. Due todynamic loascrews it is the strengthends.
This cheresponsibilit
cally ask SK This siminto accounters of the ecentration fit takes intoaxial and to
d5 r5
ZONE A
fig. 1
Recommendations for selection
8/21/2019 Standard SKF
22/88
Manufacturing precision
Generally speaking, the precision
indication given in the designa-tion defi nes the lead precision:see page 24. Lead precision according toISO (ex. G1 - G5…). Parameters other than leadprecision correspond to our inter-nal standards (generally based onISO 3408-3 class 5). If you require special toleran-ces (for example class 1 or 3)please specify when requesting aquotation or ordering.
Inspection of surface finish
Recommendations for assembly
8/21/2019 Standard SKF
23/88
Radial and moment loadsAny radial or moment load on thenut will overload some of thecontact surfaces, thus signifi cantlyreducing its life. (fi g. 1)
AlignmentSKF linear guidance componentsshould be used to ensure correctalignment and avoid non-axialloading. The parallelism of thescrew shaft with the guidingdevices must be checked.
If external linear guidanceprove impractical, we suggestmounting the nut on trunnions orgimbals and the screw shaft inself-aligning bearings. Mounting the screw in tensionhelps align it properly and elimi-nates buckling.
LubricationGood lubrication is essential forthe proper functioning of thescrew and for its long term relia-bility (1) (see fig 2)
If this operation is performedin a potentially polluted atmos-phere it is highly recommendedto proceed with a thorough clea-ning of the assembly.
Designing the screw shaft endsGenerally speaking, when theends of the screw shaft are spe-cifi ed by the customer’s enginee-ring personnel, it is theirresponsability to check thestrength of these ends.
Roller screws can be suppliedwith one end bigger than the dia-meter of the threaded portion.The core strength of such an endmay be affected by large reduc-tions of diameter. When this con-cept of a large end is used, aminimum length at root diameter
is needed between the end of thethread and the face of the largerdiameter.
Starting-up the screwAfter the assembly has been
Operating tScrews mad(see page 2under normtemperaturto +110 °C. BetweenSKF must b
adapts the and checks can be succbelow the svalue. Above +adapted to the applicat
ted, which cload rating. Consult
NOTE:Operating awill lower thsteel, alter t
thread and dability of t
Recommended assembly procedure
YESfig. 1
Roller screws are precision components and should be handledwith care to avoid shocks. When stored out of the shipping cratethey must lie on wooden or plastic vee blocks and should not beallowed to sag. Screw assemblies are shipped in a carboard/wooden crate,wrapped in a sealed plastic bag which protects them from foreignmaterial and possible pollution. They should stay wrapped until
they are used.
Technical data
8/21/2019 Standard SKF
24/88
Lead precision according to ISO
Lead precision is measured at 20 °C on the useful stroke lu, which isthe threaded length decreased, at each end, by the length le equal tothe screw shaft diameter.
G1 G3 G5
V300p µm 6 12 23
lu ep vup ep vup ep vup mm µm
0 - 315 6 6 12 12 23 23 (315) - 400 7 6 13 12 25 25 (400) - 500 8 7 15 13 27 26 (500) - 630 9 7 16 14 32 29 (630) - 800 10 8 18 16 36 31 (800) - 1000 11 9 21 17 40 34
(1000) - 1250 13 10 24 19 47 39 (1250) - 1600 15 11 29 22 55 44 (1600) - 2000 18 13 35 25 65 51 (2000) - 2500 22 15 41 29 78 59 (2500) - 3150 26 17 50 34 96 69 (3150) - 4000 32 21 62 41 115 82 (4000) - 5000 76 49 140 99 (5000) - 6300 170 119
Technical data
8/21/2019 Standard SKF
25/88
le le
m
Threaded length
l u
c
+
l0mm
fig. 2
Threaded length
lule
fig. 3
Threaded length
l e l u
300 mm
v
Mean travel :the line which fitsthe curve best bymethod of leastsquares.
300a
v300p
fig. 1
Case with value of c specified by the customer. Case with c = 0 = standard veno value given by the custome
lu = useful travel
le = excess travel (no lead precision required)
lo = nominal travel
ls = specified travel
c = travel compensation (difference between ls and lo
to be defined by the customer, for instance to
compensate for expansion)
ep = tolerance over the specified travel
V = travel variation (or permissible band width)
V300p = maximum permitted travel variation over 300 mm
Vup = maximum permitted travel variation over the useful
travel luV300a = measured travel variation over 300 mm
Vua = measured travel variation over the useful travel
Technical data
8/21/2019 Standard SKF
26/88
Preload adjustment
Cylindrical nutsIn the case of cylindrical nuts (types TRU and PRU for planetary rollerscrews - type PVU for recirculating roller screws), the threadedhousing stoppers must be tightened to the values shown into tables 1and 2 below. These torques can also be used with one-piece nuts(SRC - BRC - SVC - BVC).
The standard nut is through hardened to 56 d 60 HRc: under some load conditions itis necessary to use hardened & ground spacers (S) to avoid bedding of the nut into thehousing & stopper resulting in loss of preload and rigidity.
SVC/BVC/PVU
Housing stopper Tightening Squeeze thread torque load
d1 mm Nm Nd1 mm Nm N
Table 2
SRC/BRC/TRU/PRU
Housing stopper Tightening Squeeze thread torque load
d0 mm Nm N
8 12
15 21 25 30 39 44 48 60 64
75 80 99 120 150
30 ™ 1.0 35 ™ 1.0
40 ™ 1.0 50 ™ 1.0 60 ™ 1.0 70 ™ 1.5 90 ™ 1.5 88 ™ 1.5 110 ™ 1.5 130 ™ 2.0 125 ™ 2.0
158 ™ 2.0 148 ™ 2.0 215 ™ 2.5 230 ™ 2.5 340 ™ 2.5
20 35
45 65 80 100 140 160 180 230 250
310 340 440 550 730
2700 4100
4600 5500 5500 5900 6400 7600 6800 7400 8300
8200 9600 8500 9950 8950
d0 mm Nm N
Table 1
SVC/BVC
TRU/PRU
SRC/BRC
Technical data
8/21/2019 Standard SKF
27/88
TRK/PRK/PVK
Number of Screw Tightening screws size torque
d0 Nm
8 10 12 15
16 20 21 25 (T/PRK) 25 (PVK) 30 32 36 39 40 44 48 50 56 60 63 64 80 100 125
6 6 6 6
6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 8 12 12
M4 M4 M4 M5
M4 M5 M5 M6 M5 M8 M6 M8 M10 M8 M10 M12 M10 M12 M16 M12 M16 M16 M16 M18
3 3 3 6
3 6 6 10 6 25 10 25 50 25 50 80 50 80 200 80 200 200 200 270
d0 Nm
Table 3
Preload adjustment
Flanged nutsFor fl anged nuts (types TRK and PRK for planetary rollerscrews - type PVK for recirculating roller screws), fi xingbolts must be tightened according to table 3.
Special inspcertifi cates ctailored to irequest.The followin
1 - Certifi 2 - Lead p 3 - Dimen
report 4 - Stiffne 5 - Magn 6 - Raw m
from 7 - Chem 8 - Heat t 9 - Induct 10 - Manu
list
Produinspeccertific
Product information
8/21/2019 Standard SKF
28/88
Delivery time
1 weekwithout end machining2 weekswith machined ends
Nuts
g With backlash elimination by oversize rollers:
BRC.
Details page 30
Capabilities
g Machined ends: • premachined shafts for machining by
the customer • to customer drawing (see general rules) • suitable for FLRBU units. g Screw dimensions: see page 30.
Planetary roller screws with bearing units
Service Range
Delivery time
4 weekswith machined ento customer draw
Nuts
g With axial play: SRC-S g
With backlash elimina g Preloaded: PRU-PRK
Details page 32
Capabilities
g Machined ends to cus(see general rules).
g Screw dimensions: • up to 1500 mm • up to 900 mm th
Product information
8/21/2019 Standard SKF
29/88
Delivery time
1 weekwithout end machining2 weekswith machined ends
Nuts
g With backlash elimination by oversize rollers:
BVC.
Details page 31
Capabilities
g Machined ends: • premachined shafts for machining by
the customer • to customer drawing (see general rules) • suitable for FLRBU units g Screw dimensions: see page 31
Recirculating roller screws with b
Service
Delivery time
4 weekswith machined endsto customer drawing
Nuts
g With axial play: SVC
g
Preloaded: PVU-PVK for
Details page 32
Capabilities
g Machined ends to custom(see general rules)
g Screw dimensions: • up to 1500 mm ma • up to 900 mm thre
Product information
8/21/2019 Standard SKF
30/88
Service RangePlanetary roller screws “BRC”+ thrust bearing assembly (option)
B8
Designation Ca C
oaT
pr*
R
nrd
1 d
8 d
10 B
5 B
6 R D A w
kN kN Nm N/µm
25.9
50.5
91.9
129.2
43.5
81.9
178.3
268.9
0.10
0.30
0.60
1.10
150
200
300
400
15.4
21.4
30.4
39.4
14.3
20.3
29.3
38.3
25
40
50
70
115
178
213
259
400
570
800
1046
1.2
1.2
2.0
2.0
35
45
64
80
50
64
85
100
0.5
0.5
0.5
1.0
BRC 15x5-R5
BRC 21x5-R5
BRC 30x5-R5
BRC 39x5-R5
Thrust bearingFLRBU*
b"
" "
"BB
D g6
H
0,8
0,80 8
0,81,6
R
12
d1d8
1 x 45° w x 45° w x 45°
d10
Key a
Wi
Q LWiper
Product information
8/21/2019 Standard SKF
31/88
Service RangeRecirculating roller screws “BVC”+ thrust bearing assembly (option)
B8
Designation Ca C
oaT
pr*
R
nrd
1 d
8 d
10 B
5 B
6 R D A w
kN kN Nm N/µm
18.5
32.9
64.3
36.6
68.4
159.2
0.20
0.30
0.40
200
250
300
20
25
32
19.1 24.1
31.1
28
33
40
116
159
179
400
500
500
1.2
1.2
1.2
34
42
54
37
44
57
0.5
0.5
1.0
BVC 20x1-R1
BVC 25x1-R1
BVC 32x1-R1
Thrust bearingFLRBU*
b"
" "
"
D g6
H
0,80,8
0,8
R
12
d145°
d8
B A h12
0,5 x 45° w x 45° w x 45°
d10
Key a
No wip
Q LubrNo wiper
Product information
8/21/2019 Standard SKF
32/88
Service Range Standard nuts - Planetary r
d
0
Ph
N Ca
Coa SRC/SRF TRU/PRU - TRK/PRK SRC/SRF
15
21 21 21 21
25
25
30 30
39 39
48 48
5
5 6 8 10
5
10
5 10
5 10
5 10
5
5 5 5 5
5
5
5 5
5 5
5 5
25,9
50,5 52,7 54,4 59,2
63,2
72,6
91,9 106,3
129,2 152,6
198,0 231,5
14,3
27,8 29,0 30,0 32,6
34,8
40,0
50,6 58,5
71,1 84,0
109,1 127,5
43,5
81,9 82,0 78,0 83,0
108,2
105,3
178,3 174,3
268,9 270,9
481,5 475,1
Standard nuts - Recirculating roller screws
d0 Ph N Ca Coa
SVC PVU-PVK SVC
Product information
8/21/2019 Standard SKF
33/88
In standard version, the “FLRBU” thrust bearing unit is assepage 30 or 31. If you require a different assembly, please inGreased for life with SKF LGEP2.
Service Range Flanged thrust bearing units
D4 D2 D5 D3 D1
L1
L2L3
1,6 E
5xS1
45°
Ø 0,2
1,6
L4L5
Angular contact ball bearing (40°) Lock nut
Basic load rating Number Bearing Maximum Axial Tilt High precision KMT nut
(axial) of designation preload rigidity rigidity bearings torque *
Flanged Ca Coa Designation Hook Tightbearing spanner torquunit kN kN Nm N/µm Nm/mrad Nm designation
27.9
40.1
74.2
109.4
208.8
31.9
63.8
119.2
188.4
392.3
2
4
4
4
4
FLRBU2
FLRBU3
FLRBU4
FLRBU5
FLRBU6
7303 BEGBP
7204 BEGBP
7305 BEGBP
7307 BEGBP
7310 BEGBP
0.25
0.25
1.10
1.10
1.50
190
400
450
600
750
51
140
160
715
1000
KMT 3
KMT 4
KMT 5
KMT 7
KMT 10
HN 4
HN 5
HN 5
HN 7
HN 10
15
18
25
42
70
Nota: other sizes available: see page 58-60.
Dimensions (mm)
L1 L2 L3 L4 D1 D2 D3 D4 D5 S1
h7 H13
Flangedbearingunit
Product information
8/21/2019 Standard SKF
34/88
b1 b
a
b2
d5d4
B1B2
B4
G1
45°
ba x d7cx45°
G
Rb QE R
cx45°
Dimensions (mm)
d4 d5 d9 B1 B2 B4 B3 G G1 c ba d7 Ra R
h6 h7 js12 js12 6g h11
17
20
25
35
50
15
17
20
30
40
23
27
34
45
62
66
97
112
134
168
30
40
45
55
65
96
137
157
189
233
5
7
7
10
12
FLRBU2
FLRBU3
FLRBU4
FLRBU5
FLRBU6
Thrustbearingunits
22
22
25
26
31
0.5
0.5
0.5
1
1
1.5
1.5
2.3
2.3
2.3
15.5
18.5
22.8
32.8
47.8
0.6
0.6
0.6
0.6
0.8
0
0
0
0
0
M17 ™ 1
M20 ™ 1
M25 ™ 1.5
M35 ™ 1.5
M50 ™ 1.5
Undercut l2 is defi ned p20.d9 can be equal to the root diameter for some sizes.
8/21/2019 Standard SKF
35/88
Planetary roller screws:technical data and dimensions
Cylindrical nuts with axial play, SRC .........................................Flanged nuts with axial play, SRF ..............................................Preloaded cylindrical nuts, TRU/PRU ........................................
Preloaded flanged nuts, TRK/PRK..............................................
Recirculating roller screws: technicadimensions Cylindrical nuts with axial play, SVC ...........................................Flanged nuts with axial play, SVF ..............................................
Preloaded cylindrical nuts, PVU .................................................Preloaded flanged nuts, PVK ......................................................
Flanged thrust bearing unit, FLRBU
Standard Range: contents
Product information
8/21/2019 Standard SKF
36/88
Standard Range
The full range of “SR” planetary roller screw
8
4
5
6
8
9
10
12
15
16
18
20
24
25
30
35
36
40
12
15
20
21
24
25
30
36
39
44
48
56
60
64
75
80
99
100
12
42
L e a d ,
P
Nominal diameter, d
h
o
4 5 5 6 5 6 5 5 6 5 6 5 6 5 6 5 6 5 6 6
Product information
8/21/2019 Standard SKF
37/88
SKF planetary roller screws
The robust screw for loin tough conditions has tadvantages n Very high load carrying capacity
n Very long lifen High rotational speed and long le
speed up to 90 metres/minuten Planetary timing mechanism perm
leration (> 12 000 rad/sec2)
n Robust design to withstand shockn Choice of 3 classes of lead precisin Planetary timing mechanism ensu
functioning even in adverse enviras ice, dirt or poor lubrication
n Special and left hand leads easily n Special steels availablen Special surface treatments and lu
availablen Nut removal without losing rollingn
Cylindrical and fl anged nuts, with pn Built in wipers available in all case
L Backlash elimination with oversias an option under following conditio
Product information
8/21/2019 Standard SKF
38/88
Cylindrical nuts with axial play, SRCBacklash elimination with oversize rollers L as an optio
d0 8 g 36 mm
Standard Threaded rollers Customised
L
L
LL
L
LLLL
LL
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm
4
5
58
6
568
10
612
8
12
1515
20
21212121
2424
4
5
55
6
5555
66
500
750
975975
1300
1400140014001400
16001600
9,04
7,55
6,069,71
5,45
4,335,206,958,62
4,559,04
7
9
99
11
9999
1111
8
11
1110
14
11111110
1413
11,24
17,73
25,9527,43
26,83
50,5552,7754,4459,24
42,3047,65
19,59
26,71
43,5940,78
44,86
81,9782,1878,0683,01
65,1762,34
0,02
0,02
0,020,02
0,02
0,020,020,020,04
0,020,04
0,1
0,2
0,20,2
0,3
0,40,40,40,4
0,50,5
0,4
0,9
1,41,4
2,3
2,72,72,72,7
3,63,6
3,2
16,0
39,039,0
123,3
149,9149,9149,9149,9
255,7255,7
11,4
22,9
45,245,2
71,8
141,2141,2141,2141,2
173,2173,2
Product information
8/21/2019 Standard SKF
39/88
A
b" "
" "
BB
d1 D3
15°
D2 D
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
Wiper on request
d0 d1 d2 D A w a b H Q
Designation g6/H7 h12 h9
mm mm mm mm mm mm mm mm mm m
8,4
12,4
15,415,5
20,4
21,421,421,521,8
24,424,8
8
12
1515
20
21212121
2424
SRC 8x4
SRC 12x5
SRC 15x5SRC 15x8
SRC 20x6
SRC 21x5SRC 21x6SRC 21x8SRC 21x10
SRC 24x6SRC 24x12
7,3
11,3
14,314,0
19,3
20,320,320,019,7
23,322,7
25
30
3535
40
45454545
4848
44
44
5050
50
64646464
5858
0,5
0,5
0,50,5
0,5
0,50,50,50,5
0,50,5
4
4
44
4
5555
55
12
12
1616
16
20202020
2020
26,5
31,5
36,536,5
41,5
47,047,047,047,0
50,050,0
5
5
55
5
5555
55
Wiper recess
Product information
8/21/2019 Standard SKF
40/88
Cylindrical nuts with axial play, SRCBacklash elimination with oversize rollers L as an optio
d0 39 g 64 mm
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm
LLLLL
LLLL
L
LL
LLL
510152025
8121824
30
58
101520
3939393939
44444444
44
4848484848
55555
6666
6
55555
26502650265026502650
3000300030003000
3000
33003300330033003300
2,344,676,989,27
11,53
3,304,96
7,42 9,85
12,24
1,903,033,795,687,55
99999
11111111
11
99999
1211111010
14141313
12
1211111111
129,21152,62167,64172,82174,79
130,48143,71157,74167,81
165,86
198,08218,43231,54257,75265,69
268,92270,93272,89260,89249,00
261,47262,87264,94266,95
246,44
481,53470,61475,11486,36462,27
0,020,040,070,070,07
0,040,040,070,07
0,07
0,020,040,040,070,07
2,12,12,12,12,1
1,71,7
1,7 1,7
1,7
4,24,24,24,24,2
9,49,49,49,49,4
11,911,911,911,9
11,9
14,214,214,214,214,2
178E1178E1178E1178E1178E1
289E1289E1289E1289E1
289E1
409E1409E1409E1409E1409E1
203E1203E1203E1203E1203E1
173E1173E1173E1173E1
173E1
652E1652E1652E1652E1652E1
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
41/88
A
b" "
" "
BB
d1 D3
15°
D2 D
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
Wiper on requestWiper recess
d0 d1 d2 D A w a b H Q
Designation g6/H7 h12 h9
mm mm mm mm mm mm mm mm mm m
39,439,840,240,540,9
44,444,845,245,5
45,9
48,448,648,849,249,5
3939393939
44444444
44
4848484848
SRC 39x5SRC 39x10SRC 39x15SRC 39x20SRC 39x25
SRC 44x8SRC 44x12SRC 44x18SRC 44x24
SRC 44x30
SRC 48x5SRC 48x8SRC 48x10SRC 48x15SRC 48x20
38,337,737,136,535,9
43,242,742,141,5
40,9
47,347,146,746,145,5
8080808080
80808080
80
100100100100100
100100100100100
90909090
90
127127127127127
1,01,01,01,01,0
0,50,50,50,5
0,5
1,01,01,01,01,0
88888
6666
6
88888
4040404040
32323232
32
4545454545
83,083,083,083,083,0
82,582,582,582,5
82,5
103,0103,0103,0103,0103,0
7,07,07,07,07,0
7,07,07,07,0
7,0
7,07,07,07,07,0
Product information
8/21/2019 Standard SKF
42/88
Cylindrical nuts with axial play, SRCd0 75 g 210 mm
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm2
10
1520
12182436
75
7575
80808080
5
55
6666
5500
55005500
6000600060006000
2,43
3,644,85
2,734,105,458 15
11
1111
13131311
12
1111
14141413
504,86
561,29572,26
410,27455,94485,80442 89
1486,68
1491,301495,87
1163,161167,631172,06999 09
0,04
0,070,07
0,040,070,070 07
14,6
14,614,6
8,98,98,98 9
34,7
34,734,7
39,539,539,539 5
244E2
244E2244E2
316E2316E2316E2316E2
469E2
469E2469E2
260E2260E2260E2252E2
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
43/88
d0 d1 d2 D A w a b H Q
Designation g6/H7 h12 h9
mm mm mm mm mm mm mm mm mm m
75,8
76,276,5
80,881,281,582 3
75
7575
80808080
SRC 75x10
SRC 75x15SRC 75x20
SRC 80x12SRC 80x18SRC 80x24SRC 80x36
73,7
73,172,5
78,778,177,576 3
150
150150
140140140140
191
191191
156156156156
1,0
1,01,0
1,01,01,01 0
10
1010
10101010
63
6363
63636363
153
153153
143143143143
10
1010
10101010
A
b" "
" "
BB
d1 D3
15°
D2 D
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
Wiper on requestWiper recess
Product information
8/21/2019 Standard SKF
44/88
Flanged nuts with axial play, SRFBacklash elimination with oversize rollers L as an optio
d0 8 g 36 mm
Standard Threaded rollers Customised
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm
4
5
58
6
568
10
612
8
12
1515
20
21212121
2424
4
5
55
6
5555
66
500
750
975975
1300
1400140014001400
16001600
9,04
7,55
6,069,71
5,45
4,335,206,95
8,62
4,55 9,04
7
9
99
11
9999
1111
8
11
1110
14
11111110
1413
11,24
17,73
25,9527,43
26,83
50,5552,7754,4459,24
42,3047,65
19,59
26,71
43,5940,78
44,86
81,9782,1878,0683,01
65,1762,34
0,02
0,02
0,020,02
0,02
0,020,020,020,04
0,020,04
0,3
0,3
0,50,5
0,5
0,70,70,70,7
0,80,8
0,4
0,9
1,41,4
2,3
2,72,72,72,7
3,63,6
3,2
16,0
39,039,0
123,3
149,9149,9149,9149,9
255,7255,7
66,4
106,0
201,6201,6
289,5
436,6436,6436,6436,6
524,2524,2
L
L
LL
L
LLLL
LL
Product information
8/21/2019 Standard SKF
45/88
A
r r
A2
A1
d1 D3 D2
G
Dg6/H7
D1d0 d2
0,8
0,8
D0 +0,5
d0 d1 d2 D A A1 A2 D1 J G r Q
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm mm
8,4
12,4
15,415,5
20,4
21,421,421,521,8
24,424,8
8
12
1515
20
21212121
2424
SRF 8x4
SRF 12x5
SRF 15x5SRF 15x8
SRF 20x6
SRF 21x5SRF 21x6SRF 21x8SRF 21x10
SRF 24x6SRF 24x12
7,3
11,3
14,314,0
19,3
20,320,320,019,7
23,322,7
25
30
3535
40
45454545
4848
44
44
5050
50
64646464
5858
14,0
14,0
16,016,0
16,0
23,023,023,023,0
20,020,0
16
16
1818
18
18181818
1818
46
51
5858
63
68686868
7171
36
41
4646
51
56565656
5959
6xM4
6xM4
6xM56xM5
6xM5
6xM56xM56xM56xM5
6xM56xM5
0,4
0,4
0,40,4
0,8
0,80,80,80,8
0,80,8
M6
M6
M6M6
M6
M6M6M6M6
M6M6
Wiper on request
Wiper recess
Equidistant
Product information
8/21/2019 Standard SKF
46/88
510152025
8121824
30
58
101520
3939393939
44444444
44
4848484848
55555
6666
6
55555
26502650265026502650
3000300030003000
3000
33003300330033003300
2,34 4,67 6,98 9,2711,53
3,304,96
7,42 9,85
12,24
1,903,03
3,79 5,687,55
99999
11111111
11
99999
1211111010
14141313
12
1211111111
129,21152,62167,64172,82174,79
130,48143,71157,74167,81
165,86
198,08218,43231,54257,75265,69
268,92270,93272,89260,89249,00
261,47262,87264,94266,95
246,44
481,53470,61475,11486,36462,27
0,020,040,070,070,07
0,040,040,070,07
0,07
0,020,040,040,070,07
4,04,04,04,04,0
3,63,6
3,6 3,6
3,6
7,8 7,87,87,87,8
9,49,49,49,49,4
11,911,911,911,9
11,9
14,214,214,214,214,2
178E1178E1178E1178E1178E1
289E1289E1289E1289E1
289E1
409E1409E1409E1409E1409E1
836E1836E1836E1836E1836E1
803E1803E1803E1803E1
803E1
185E2185E2185E2185E2185E2
LLLLL
LLLL
L
LL
LLL
Flanged nuts with axial play, SRFBacklash elimination with oversize rollers L as an optio
d0 39 g 64 mm
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
47/88
39,439,840,240,540,9
44,444,845,245,5
45,9
48,448,648,849,249,5
3939393939
44444444
44
4848484848
SRF 39x5SRF 39x10SRF 39x15SRF 39x20SRF 39x25
SRF 44x8SRF 44x12SRF 44x18SRF 44x24
SRF 44x30
SRF 48x5SRF 48x8SRF 48x10SRF 48x15SRF 48x20
38,337,737,136,535,9
43,242,742,141,5
40,9
47,347,146,746,145,5
8282828282
82828282
82
105105105105105
100100100100100
90909090
90
127127127127127
33,533,533,533,533,5
28,528,528,528,5
28,5
45,045,045,045,045,0
3333333333
33333333
33
3737373737
124124124124124
124124124124
124
150150150150150
102102102102102
102102102102
102
127127127127127
6xM106xM106xM106xM106xM10
6xM106xM106xM106xM10
6xM10
6xM126xM126xM126xM126xM12
1,21,21,21,21,2
1,21,21,21,2
1,2
1,21,21,21,21,2
M6M6M6M6M6
M6M6M6M6
M6
M8x1M8x1M8x1M8x1M8x1
A
r r
A2
A1
d1 D3 D2
G
Dg6/H7
D1d0 d2
0,8
0,8
D0 +0,5
d0 d1 d2 D A A1 A2 D1 J G r Q
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm mm
Wiper on request
Wiper recess
Equidistant
Product information
Fl d t ith i l l SRF
8/21/2019 Standard SKF
48/88
Flanged nuts with axial play, SRFd0 75 g 210 mm
d0 Ph N ltp a Nr Nmax Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm2
10
1520
12182436
75
7575
80808080
5
55
6666
5500
55005500
6000600060006000
2,43
3,64 4,85
2,73 4,10 5,458 15
11
1111
13131311
12
1111
14141413
504,86
561,29572,26
410,27455,94485,80442 89
1486,68
1491,301495,87
1163,161167,631172,06999 09
0,04
0,070,07
0,040,070,070 07
20,6
20,620,6
17,717,717,717 7
34,7
34,734,7
39,539,539,539 5
244E2
244E2244E2
316E2316E2316E2316E2
114E3
114E3114E3
108E3108E3108E3108E3
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
49/88
d0 d1 d2 D A A1 A2 D1 J G r Q
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm mm
75,8
76,276,5
80,881,281,582 3
75
7575
80808080
SRF 75x10
SRF 75x15SRF 75x20
SRF 80x12SRF 80x18SRF 80x24SRF 80x36
73,7
73,172,5
78,778,177,576 3
150
150150
150150150150
191
191191
156156156156
73,0
73,073,0
55,555,555,555 5
45
4545
45454545
210
210210
210210210210
180
180180
180180180180
8xM16
8xM168xM16
8xM168xM168xM168xM16
1,6
1,61,6
1,61,61,61 6
M8x1
M8x1M8x1
M8x1M8x1M8x1M8x1
A
r r
A2
A1
d1 D3 D2
G
Dg6/H7
D1d0 d2
0,8
0,8
D0 +0,5
Wiper on request
Wiper recess
Equidistant
Product information
Preloaded cylindrical nuts TRU for backlash eliminatio
8/21/2019 Standard SKF
50/88
Preloaded cylindrical nuts, TRU for backlash eliminatio PRU for optimum rigidity
d0 8 g 36 mm
TRU PRU
d0 Ph N ltp a Nr Nmax Ca Coa Tpe Rng Rnr Tpr Fpr mn ms
mm mm — mm ° kN kN Nm N/µm N/µm Nm N kg kg/m
Standard Threaded rollers Customised
4
5
58
6
568
10
612
8
12
1515
20
21212121
2424
4
5
55
6
5555
66
400
600
750750
1050
1100110011001100
12501250
9,04
7,55
6,069,71
5,45
4,335,206,95
8,62
4,55 9,04
7
9
99
11
9999
1111
8
11
1110
14
11111110
1413
6,19
9,77
14,3015,11
14,78
27,8529,0830,0032,64
23,3126,25
9,79
13,36
21,8020,39
22,43
40,9841,0939,0341,51
32,5931,17
0,07
0,13
0,190,19
0,30
0,330,330,330,33
0,410,41
110
180
290242
290
400359311200
370150
150
240
380315
380
520467404260
490200
0,06 - 0,13
0,12 - 0,25
0,18 - 0,360,18 - 0,36
0,26 - 0,58
0,31 - 0,630,31 - 0,630,31 - 0,630,31 - 0,63
0,39 - 0,780,39 - 0,78
236
570
932954
1305
134113941354 557
1597 541
0,1
0,2
0,20,2
0,3
0,40,40,40,4
0,50,5
0,4
0,9
1,41,4
2,3
2,72,72,72,7
3,63,6
Product information
8/21/2019 Standard SKF
51/88
A
b" "
" "
BB
d1 D3
15°
D2 D
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
d0 d1 d2 D A w a b H Q
Designation g6/H7 h12 h9
mm mm mm mm mm mm mm mm mm m
8,4
12,4
15,415,5
20,4
21,421,421,521,8
24,424,8
8
12
1515
20
21212121
2424
TRU/PRU 8x4
TRU/PRU 12x5
TRU/PRU 15x5TRU/PRU 15x8
TRU/PRU 20x6
TRU/PRU 21x5TRU/PRU 21x6TRU/PRU 21x8TRU/PRU 21x10
TRU/PRU 24x6TRU/PRU 24x12
7,3
11,3
14,314,0
19,3
20,320,320,019,7
23,322,7
25
30
3535
40
45454545
4848
44
44
5050
50
64646464
5858
0,5
0,5
0,50,5
0,5
0,50,50,50,5
0,50,5
4
4
44
4
5555
55
12
12
1616
16
20202020
2020
26,5
31,5
36,536,5
41,5
47,047,047,047,0
50,050,0
Wiper on requestWiper recess
Product information
Preloaded cylindrical nuts TRU for backlash eliminatio
8/21/2019 Standard SKF
52/88
Preloaded cylindrical nuts, TRU for backlash eliminatio PRU for optimum rigidity
d0 39 g 64 mm
TRU PRU
d0 Ph N ltp a Nr Nmax Ca Coa Tpe Rng Rnr Tpr Fpr mn ms
mm mm — mm ° kN kN Nm N/µm N/µm Nm N kg kg/m
510152025
812182430
58
101520
3939393939
4444444444
4848484848
55555
66666
55555
21002100210021002100
24002400240024002400
26002600260026002600
2,344,676,989,27
11,53
3,304,967,429,85
12,24
1,903,033,795,687,55
99999
1111111111
99999
1211111010
1414131312
1211111111
71,1984,0992,3695,2296,30
71,8979,1886,9192,4691,38
109,13120,34127,57142,01146,38
134,46135,46136,45130,45124,50
130,73131,44132,47133,48123,22
240,77235,30237,56243,18231,14
0,920,920,920,920,92
1,121,121,121,121,12
1,301,301,301,301,30
750500390220210
688610430290190
1080889760600460
980650510290280
895800550380250
14101156 980 780 600
0,88 - 1,750,88 - 1,750,88 - 1,750,88 - 1,751,31 - 2,19
1,07 - 2,141,07 - 2,141,07 - 2,141,07 - 2,141,60 - 2,68
1,24 - 2,471,24 - 2,471,24 - 2,471,24 - 2,471,24 - 2,47
228819651465 694697
243222971497 725727
26982583240520721423
2,12,12,12,12,1
1,71,7
1,7 1,7 1,7
4,24,2
4,2 4,2 4,2
9,49,49,49,49,4
11,911,911,911,911,9
14,214,214,214,214,2
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
53/88
d0 d1 d2 D A w a b H Q
Designation g6/H7 h12 h9
mm mm mm mm mm mm mm mm mm m
39,439,840,240,540,9
44,444,845,245,545,9
48,448,648,849,249,5
3939393939
4444444444
4848484848
TRU/PRU 39x5TRU/PRU 39x10TRU/PRU 39x15TRU/PRU 39x20TRU/PRU 39x25
TRU/PRU 44x8TRU/PRU 44x12TRU/PRU 44x18TRU/PRU 44x24TRU/PRU 44x30
TRU/PRU 48x5TRU/PRU 48x8TRU/PRU 48x10TRU/PRU 48x15TRU/PRU 48x20
38,337,737,136,535,9
43,242,742,141,540,9
47,347,146,746,145,5
8080808080
8080808080
100100100100100
100100100100100
9090909090
127127127127127
1,01,01,01,01,0
0,50,50,50,50,5
1,01,01,01,01,0
88888
66666
88888
4040404040
3232323232
4545454545
83,083,083,083,083,0
82,582,582,582,582,5
103,0103,0103,0103,0103,0
77777
77777
77777
A
b" "
" "
BB
d1 D3
15°
D2 D
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
Wiper on requestWiper recess
Product information
Preloaded flanged nuts, TRK for backlash elimination
8/21/2019 Standard SKF
54/88
Preloaded flanged nuts, TRK for backlash elimination PRK for optimum rigidity
d0 8 g
36 mm
TRK PRK
d0 Ph N ltp a Nr Nmax Ca Coa Tpe Rng Rnr Tpr Fpr mn ms
mm mm — mm ° kN kN Nm N/µm N/µm Nm N kg kg/m
Standard Threaded rollers Customised
4
5
58
6
568
10
612
8
12
1515
20
21212121
2424
4
5
55
6
5555
66
400
600
750750
1050
1100110011001100
12501250
9,04
7,55
6,069,71
5,45
4,335,206,95
8,62
4,55 9,04
7
9
99
11
9999
1111
8
11
1110
14
11111110
1413
6,19
9,77
14,3015,11
14,78
27,8529,0830,0032,64
23,3126,25
9,79
13,36
21,8020,39
22,43
40,9841,0939,0341,51
32,5931,17
0,07
0,13
0,190,19
0,30
0,330,330,330,33
0,410,41
110
180
290242
290
400359311200
370150
150
240
380315
380
520467404260
490200
0,06 - 0,13
0,12 - 0,25
0,18 - 0,360,18 - 0,36
0,26 - 0,58
0,31 - 0,630,31 - 0,630,31 - 0,630,31 - 0,63
0,39 - 0,780,39 - 0,78
236
570
932954
1305
134113941354 557
1597 541
0,3
0,3
0,50,5
0,5
0,70,70,70,7
0,80,8
0,4
0,9
1,41,4
2,3
2,72,72,72,7
3,63,6
Product information
8/21/2019 Standard SKF
55/88
A
r r
A2
A1
BB
d1 D3
15°
D2
G
Dg6/H7
D1d0 d2 D0
+0,5
0,8
0,8
Wiper recess
Wiper on request
Dowel pins
to hold preload
d0 d1 d2 D A A1 A2 D1 J G r Q
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm mm
8,4
12,4
15,415,5
20,4
21,421,021,021,8
24,424,8
8
12
1515
20
21212121
2424
TRK/PRK 8x4
TRK/PRK 12x5
TRK/PRK 15x5TRK/PRK 15x8
TRK/PRK 20x6
TRK/PRK 21x5TRK/PRK 21x6TRK/PRK 21x8TRK/PRK 21x10
TRK/PRK 24x6TRK/PRK 24x12
7,3
11,3
14,314,0
19,3
20,320,320,019,7
23,322,7
25
30
3535
40
45454545
4848
44
44
5050
50
64646464
5858
14,0
14,0
16,016,0
16,0
23,023,023,023,0
20,020,0
16
16
1818
18
18181818
1818
46
51
5858
63
68686868
7171
36
41
4646
51
56565656
5959
6xM4
6xM4
6xM56xM5
6xM5
6xM56xM56xM56xM5
6xM56xM5
0,4
0,4
0,40,4
0,8
0,80,80,80,8
0,80,8
M6
M6
M6M6
M6
M6M6M6M6
M6M6
Equidistant
Product information
Preloaded flanged nuts, TRK for backlash elimination
8/21/2019 Standard SKF
56/88
g PRK for optimum rigidity
d0 39 g
64 mm
TRK PRK
d0 Ph N ltp a Nr Nmax Ca Coa Tpe Rng Rnr Tpr Fpr mn ms
mm mm — mm ° kN kN Nm N/µm N/µm Nm N kg kg/m
510152025
812182430
58
101520
3939393939
4444444444
4848484848
55555
66666
55555
21002100210021002100
24002400240024002400
26002600260026002600
2,34 4,67 6,98 9,2711,53
3,304,96
7,42 9,8512,24
1,903,03
3,79 5,68 7,55
99999
1111111111
99999
1211111010
1414131312
1211111111
71,1984,0992,3695,2296,30
71,8979,1886,9192,4691,38
109,13120,34127,57142,01146,38
134,46135,46136,45130,45124,50
130,73131,44132,47133,48123,22
240,77235,30237,56243,18231,14
0,920,920,920,920,92
1,121,121,121,121,12
1,301,301,301,301,30
750500390220210
761610
430 290 190
1080889
760 600 460
980650510290280
989800
550 380 250
14101156 980 780 600
0,88 - 1,750,88 - 1,750,88 - 1,750,88 - 1,751,31 - 2,19
1,07 - 2,141,07 - 2,141,07 - 2,141,07 - 2,141,60 - 2,68
1,24 - 2,471,24 - 2,471,24 - 2,471,24 - 2,471,24 - 2,47
228819651465 694 697
344522971497 725 724
26982583240520721423
4,04,04,04,04,0
3,63,6
3,6 3,6 3,6
7,77,7
7,7 7,7 7,7
9,49,49,49,49,4
11,911,911,911,911,9
14,214,214,214,214,2
Standard Threaded rollers Customised
Product information
8/21/2019 Standard SKF
57/88
d0 d1 d2 D A A1 A2 D1 J G r Q
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm m
39,439,840,240,540,9
44,444,845,245,545,9
48,448,648,849,249,5
3939393939
4444444444
4848484848
TRK/PRK 39x5TRK/PRK 39x10TRK/PRK 39x15TRK/PRK 39x20TRK/PRK 39x25
TRK/PRK 44x8TRK/PRK 44x12TRK/PRK 44x18TRK/PRK 44x24TRK/PRK 44x30
TRK/PRK 48x5TRK/PRK 48x8TRK/PRK 48x10TRK/PRK 48x15TRK/PRK 48x20
38,337,737,136,535,9
43,242,742,141,540,9
47,347,146,746,145,5
8282828282
8282828282
105105105105105
100100100100100
9090909090
127127127127127
33,533,533,533,533,5
28,528,528,528,528,5
4545454545
3333333333
3333333333
3737373737
124124124124124
124124124124124
150150150150150
102102102102102
102102102102102
127127127127127
6xM106xM106xM106xM106xM10
6xM106xM106xM106xM106xM10
6xM126xM126xM126xM126xM12
1,21,21,21,21,2
1,21,21,21,21,2
1,21,21,21,21,2
MMMMM
MMMMM
M8xM8xM8xM8xM8x
A
r r
A2 A1
BB
d1 D3
15°
D2
G
Dg6/H7
D1d0 d2 D0
+0,5
0,8
0,8
Wiper recess
Wiper on request
Dowel pins
to hold preload
Equidistant
Product information
Flanged thrust bearing units
8/21/2019 Standard SKF
58/88
In standard version, the “FLRBU” thrust bearing unit is aspage 30 or 31. If you require a different assembly, pleaseGreased for life with SKF LGEP2.
g g
Angular contact ball bearing (40°) Lock nut
Basic load rating Number Bearings Maximum Axial Tilt High precision KMT nut (axial) of designation preload rigidity rigidity
bearings torque *
Flanged Ca Coa Designation Hook Tbearing spanner tunit kN kN Nm N/µm Nm/mrad Ndesignation
13,3
27.9
40.1 74.2
109.4
208.8
305,3
473,1
14,7
31.9
63.8 119.2
188.4
392.3
615,4
1123
2
2
4 4
4
4
4
4
FLRBU1
FLRBU2
FLRBU3FLRBU4
FLRBU5
FLRBU6
FLRBU7
FLRBU8
7201 BEGBP
7303 BEGBP
7204 BEGBP 7305 BEGBP
7307 BEGBP
7310 BEGBP
7313 BEGBP 7318 BEGBP
0.10
0.25
0.25 1.10
1.10
1.50
2.00
2.30
150
190
400 450
600
750
1250
1500
40
51
140 160
715
1000
3200
7500
KMT 1
KMT 3
KMT 4 KMT 5
KMT 7
KMT 10
KMT 13
KMT 18
HN 3
HN 4
HN 5 HN 5
HN 7
HN 10
HN 14
HN 18
D4 D2 D5 D3 D1
L1
L2L3
1,6
E
45
Ø 0,2
1,6
L4L5
Dimensions (mm)
L1 L2 L3 L4 D1 D2 D3 D4 D5
h7
Flangedbearingunit
Product information
8/21/2019 Standard SKF
59/88
Dimensions (mm)
d4 d5 d9 B1 B2 B4 B3 G G1 c ba d7 Ra Rb
h6 h7 js12 js12 6g h11
12
17
20
25 35
50
65
90
10
15
17
20 30
40
60
85
17
23
27
34 45
62
78
108
58
66
97
112 134
168
210
270
20
30
40
45 55
65
100
120
78
96
137
157 189
233
310
390
5
5
7
7 10
12
18
25
FLRBU1
FLRBU2
FLRBU3
FLRBU4FLRBU5
FLRBU6
FLRBU7
FLRBU8
Thrustbearingunits
17
22
22
25 26
31
32
39
0.5
0.5
0.5
0.5 1
1
1
1
1.5
1.5
1.5
2.3 2.3
2.3
3.0
3.0
10.5
15.5
18.5
22.8 32.8
47.8
62.2
87.2
0.4
0.6
0.6
0.6 0.6
0.8
1.2
1.6
0.4
0.6
0.6
0.6 0.6
0.8
1.0
1.2
M12 ™ 1
M17 ™ 1
M20 ™ 1
M25 ™ 1.5 M35 ™ 1.5
M50 ™ 1.5
M65 ™ 2
M90 ™ 2
Undercut l2 is defi ned p20.d9 can be equal to the root diameter for some sizes.
b1b
a
b2
d5d4
B1B2
B4
G1
45°
ba x d7cx45°
G
Rb QE Ra
cx45°
Product information
Other possible bearing arrangement
8/21/2019 Standard SKF
60/88
In case of load acting mainly in one direction, we recommend following thrust bear
Ca (kN) Coa (kN) Ca (kN)
FLRBU1 (*): No other possible arrangement (1+1)FLRBU2 (*): No other possible arrangement (1+1)
FLRBU3
FLRBU4
FLRBU5
FLRBU6
FLRBU7
FLRBU8
53,3
98,6
145,3
277,3
405,5
628,3
--
95,7
178,8
282,6
588,6
923,1
1684,6
--
24,7
45,7
67,3
128,5
187,9
291,2
Product information
Flanged thrust bearing units
8/21/2019 Standard SKF
61/88
Flange Suitable for SRC & SRF Suitable for PRU & PRKthrust bearing
SKF “FLRBU” fl anged thrust bearing units can be fi tted on the screw shafts in the tab
FLRBU1
FLRBU2
FLRBU3
FLRBU4
FLRBU5
FLRBU6
FLRBU7
SR 8 ™ 4 - R4
SR 12 ™ 5 - R5SR 15 ™ 5 - R5 — SR 15 ™ 8 - R5SR 20 ™ 6 - R6
SR 24 ™ 6 - R6
SR 21 ™ 5 - R5 — SR 21 ™ 6 - R5 — SR 21 ™ 8 - R5SR 21 ™ 10 - R5SR 24 ™ 12 - R6SR 25 ™ 5 - R5 — SR 25 ™ 10 - R5 — SR 25 ™ 15 - R5
SR 30 ™ 5 - R5 — SR 30 ™ 6 - R5 — SR 30 ™ 10 - R5
SR 30 ™ 20 - R5SR 36 ™ 6 - R6 — SR 36 ™ 9 - R6 — SR 36 ™ 12 - R6SR 36 ™ 18 - R6 — SR 36 ™ 24 - R6
SR 39 ™ 5 - R5 — SR 39 ™ 10 - R5 — SR 39 ™ 15 - R5SR 39 ™ 20 - R5 — SR 39 ™ 25 - R5SR 44 ™ 8 - R6 — SR 44 ™ 12 - R6 — SR 44 ™ 18 - R6SR 44 ™ 24 - R6 — SR 44 ™ 30 - R6
SR 48 ™ 5 - R5 — SR 48 ™ 8 - R5 — SR 48 ™ 10 - R5SR 56 ™ 12 - R6
SR 48 ™ 15 - R5 — SR 48 ™ 20 - R5 — SR 48 ™ 25 - R5SR 56 ™ 24 - R6 — SR 56 ™ 36 - R6SR 64 12 R6 SR 64 18 R6 SR 64 24 R6
PR 8 ™ 4 - R4PR 12 ™ 5 - R5PR 15 ™ 5 - R5 — PR 15 ™ 8 -
PR 20 ™ 6 - R6PR 21 ™ 5 - R5 — PR 21 ™ 6 -PR 24 ™ 6 - R6 — PR 24 ™ 12
PR 21 ™ 10 - R5PR 25 ™ 5 - R5 — PR 25 ™ 10
PR 30 ™ 5 - R5 — PR 30 ™ 6 -PR 30 ™ 20 - R5PR 36 ™ 6 - R6 — PR 36 ™ 9 -PR 36 ™ 18 - R6 — PR 36 ™ 24 PR 39 ™ 5 - R5PR 44 ™ 8 - R6 — PR 44 ™ 12
PR 39 ™ 10 - R5 — PR 39 ™ 15
PR 39 ™ 25 - R5PR 44 ™ 18 - R6 — PR 44 ™ 24 PR 48 ™ 5 - R5 — PR 48 ™ 8 -PR 56 ™ 12 - R6
PR 48 ™ 10 - R5 — PR 48 ™ 15 PR 48 ™ 25 - R5PR 56 ™ 24 - R6 — PR 56 ™ 36 PR 60 ™ 10 - R5 — PR 60 ™ 15
PR 64 ™ 12 - R6 — PR 64 ™ 18 PR 64 ™ 30 - R6 — PR 64 ™ 36
Product information
Standard Range
8/21/2019 Standard SKF
62/88
The full range of “SV” recirculating roller scr
1
2
3
4
5
L e a d ,
P h
External diameter, d 1
8 10 12 16 20 25 32 40 50 63
Standard program
Right hand lead
Manufacturing possibilities
on request
Product information
SKF recirculating roller screws
8/21/2019 Standard SKF
63/88
The fine screw for ultimtioning accuracy has theadvantages
n 1 mm lead on screws from8 - 50 mm diameter
n Fine resolutionn Choice of 3 classes of lead precisin Minimum input torque because o
mechanical advantagen Simplifi cation of transmissions to
performancen High load capacityn Long life
n High rigidity and reliability (no miparts)
n Special surface treatments and luavailable
n Cylindrical nuts with play or prelon
Flanged nuts with play or preload
L Backlash elimination with oversias an option under following conditio
Product information
Cylindrical nuts with axial play, SVCNuts with or without wiper recesses (standard = withou
8/21/2019 Standard SKF
64/88
Nuts with or without wiper recesses (standard = withouBacklash elimination with oversize rollers L as an optio
d1 Ph N ltp a Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm2
L
L
LLL
LL
LL
LL
LL
L
Standard Grooved rollers Customised
1
1
2
12
12
12
12
12
1
8
10
10
12 12
16 16
20 20
25 25
32 32
40
1
1
212
12
12
12
12
1
500
650
650750
750
10501050
13001300
16501650
21502150
2700
2,28
1,82
3,641,523,04
1,142,28
0,911,82
0,731,46
0,571,14
0 46
8,4
8,9
8,910,3
10,3
11,5 11,5
18,5 18,5
32,9 32,9
64,3 64,3
79 1
11,0
11,4
11,414,0
14,0
16,8 16,8
36,6 36,6
68,4 68,4
159,2 159,2
231 6
0,02
0,02
0,020,020,02
0,020,02
0,020,02
0,020,02
0,020,02
0 02
0,1
0,1
0,10,1
0,1
0,1 0,1
0,2 0,2
0,3 0,3
0,6 0,6
1 2
0,36
0,57
0,570,84
0,84
1,51 1,51
2,38 2,38
3,75 3,75
6,18 6,18
9 69
2,6
6,7
6,714,2
14,2
46,2 46,2
114,9114,9
284,5284,5
773,3773,3
190E1
3,6
5,0
5,06,7
6,7
14,0 14,0
29,8 29,8
79,3 79,3
280,2280,2
878 7
A
Product information
8/21/2019 Standard SKF
65/88
b" "
" "
B
d1 D2 D2-0,3
gD
Qw x 45° w x 45°
Hd0 d2
0,8
0,8 0,8
d0 d1 d2 D A B w a b
Designation g6/H7 with wiper without wiper h9
recess h12 recess h12
mm mm mm mm mm mm mm mm mm mm
8
10
101212
1616
2020
2525
3232
40
7,7
9,7
9,711,711,7
15,715,7
19,719,7
24,724,7
31,731,7
39 7
SVC 8x1
SVC 10x1
SVC 10x2SVC 12x1SVC 12x2
SVC 16x1SVC 16x2
SVC 20x1SVC 20x2
SVC 25x1SVC 25x2
SVC 32x1SVC 32x2
SVC 40x1
7,1
9,1
9,111,111,1
15,115,1
19,119,1
24,124,1
31,131,1
39 1
20
22
222424
2929
3434
4242
5454
68
40
40
404040
4040
4545
5454
6767
75
4
4
444
44
44
55
55
5
0,2
0,2
0,20,20,2
0,50,5
0,50,5
0,50,5
1,01,0
1 0
2
2
222
33
33
44
44
5
12
12
121212
1212
1616
2020
2525
32
31
31
313131
3131
3737
4444
5757
63
Wiper on request
Product information
Flanged nuts with axial play, SVFBacklash elimination with oversize rollers L as an optio
8/21/2019 Standard SKF
66/88
Backlash elimination with oversize rollers L as an optio
d1 Ph N ltp a Ca Coa Sap mn ms Is Inn
mm mm — mm ° kN kN mm kg kg/m kgmm2/m kgmm2
L
LL
LL
LL
LL
LL
LL
L
1
1
212
12
12
12
12
1
8
10
1012
12
16 16
20 20
25 25
32 32
40
1
1
212
12
12
12
12
1
500
650
650750
750
10501050
13001300
16501650
21502150
2700
2,28
1,82
3,641,523,04
1,142,28
0,911,82
0,731,46
0,571,14
0 46
8,4
8,9
8,910,3
10,3
11,5 11,5
18,5 18,5
32,9 32,9
64,3 64,3
79 1
11,0
11,4
11,414,0
14,0
16,8 16,8
36,6 36,6
68,4 68,4
159,2 159,2
231 6
0,02
0,02
0,020,020,02
0,020,02
0,020,02
0,020,02
0,020,02
0 02
0,2
0,2
0,20,2
0,2
0,3 0,3
0,4 0,4
0,6 0,6
1,2 1,2
2 1
0,36
0,57
0,570,84
0,84
1,51 1,51
2,38 2,38
3,75 3,75
6,18 6,18
9 69
2,6
6,7
6,714,2
14,2
46,2 46,2
114,9114,9
284,5284,5
773,3773,3
190E1
47,9
47,0
47,063,5
63,5
100,3100,3
191,9191,9
415,8415,8
111E1111E1
312E1
Standard Grooved rollers Customised
Product information
A
8/21/2019 Standard SKF
67/88
d0 d1 d2 D A A1 A2 D1 J G r
Designation h12 js12 +0,4
mm mm mm mm mm mm mm mm mm mm mm
8
10
101212
1616
2020
2525
3232
40
7,7
9,7
9,711,711,7
15,715,7
19,719,7
24,724,7
31,731,7
39 7
SVF 8x1
SVF 10x1
SVF 10x2SVF 12x1SVF 12x2
SVF 16x1SVF 16x2
SVF 20x1SVF 20x2
SVF 25x1SVF 25x2
SVF 32x1SVF 32x2
SVF 40x1
7,1
9,1
9,111,111,1
15,115,1
19,119,1
24,124,1
31,131,1
39 1
22
22
222525
3030
3535
4545
5656
68
40
40
404040
4040
4545
5454
6767
75
12,0
12,0
12,012,012,0
12,012,0
13,513,5
18,018,0
23,523,5
24 0
16
16
161616
1616
1818
1818
2020
27
43
43
434646
5151
5858
6868