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Why buy this bearing for another 90 years?
Publ. No. 4847 E
1
Dist
ributors 65%
Electrical 2%
Others 11%
Metalworking 2%
Mining & Construction 2%
Material handling 2%
Textile 5%
Agriculture 4%
Food & Beverage 4%
Automotive 3%
Sales per segment– Self-Aligning Ball Bearings
Self-aligning ball bearingsPubl. No. 4847 E
2
Sales per Country– Self-Aligning Ball Bearings
Den
mar
k 2% Others 28%
Austria
2%Spain 2%
Netherl
ands 3%UK 3%
Sweden 5%
France 6%Can
ada
2%T
haila
nd 2
%
USA 6%
Brazil 7%
India 7%It
aly
10%
Germany 15%
Self-aligning ball bearingsPubl. No. 4847 E
3
Decisive features of Self-aligning ball bearings
High speed performance High machine productivity
Minimum maintenance needed Economic operation
Self-aligning Lighter and more compact machines
Self-aligning ball bearingsPubl. No. 4847 E
4
Low frictionSelf-aligningball bearings
Outer ring: Point contactInner ring: Elliptical contact
Deep grooveball bearings
Outer and inner ring:Elliptical contact
0,0018
0,0015
0,0010
Coefficient of friction
Self-aligningball bearings
Deep grooveball bearings
Spherical rollerbearings
Self-aligning ball bearingsPubl. No. 4847 E
5
Low friction
Low operating
cost
Longer relubrication
intervals
Lowermaintenance
cost
Lessenergy
consumption
Highmachine
productivity
Very highspeed rating
Less needfor cooling
Low operating temperature
Self-aligning ball bearingsPubl. No. 4847 E
6
Seating out of square
Seatings offsetDeflected shaft Deflected house
Types of misalignment
Self-aligning ball bearingsPubl. No. 4847 E
7
Self-alignment
Friction freeadjustment
No influence on bearing life
Self-aligning ball bearings
Stress in bearing
Shorter bearing life
Y-unitsVarying
load
Varying load
Self-aligning ball bearingsPubl. No. 4847 E
8
Self-aligning ball bearingsPubl. No. 4847 E
9
Environmentally friendly
Low friction
andminimum lubricant
consumptionsaves
recources
SKF
ISO14001
Excellent minimal load performance
Self-aligning ball bearingsPubl. No. 4847 E
10
Separators
Alfa Laval
Self-aligning ball bearingsPubl. No. 4847 E
11
Demand for very high speed
and self-aligning bearingdue to flexing rotor
Conveyors
Jokan systems A/S
Self-aligning ball bearingsPubl. No. 4847 E
12
Demand for
minimummaintenance
Tractor mowers
Toro
Demand for minimum maintenance
and self-aligning bearings
due to flexing structure
Self-aligning ball bearingsPubl. No. 4847 E
13
Clean air fans
Comefri
Self-aligning ball bearingsPubl. No. 4847 E
14
Demand forlow noise
and vibration
Vegetable mulchers
Berti Macchine Agricole
Self-aligning ball bearingsPubl. No. 4847 E
15
Demand for minimum maintenance
and self-aligning bearings due to flexing structures
Spinningmachines
Toyoda Automatic Loom Works, Ltd
Self-aligning ball bearingsPubl. No. 4847 E
16
Demand for quick and safe
mounting
Self-aligning ball bearings in harmonic combination with
CARBTM and spherical roller bearings
Self-aligning ball bearingsPubl. No. 4847 E
17
Speed performance
Speed ratings for
different bearing types
15000
10000
5000
0
n [r/min]
Grease Oil
Y-unit on h11 shaft
Y-unit on h6 shaft
Deep groove ball bearing 6206
Spherical roller bearing 22206 E
Self-aligning ball bearing 2206 E
630
6300
7500
9500
12000
13000
Self-aligning ball bearingsPubl. No. 4847 E
18
Relubrication interval- comparison with other bearing types
0
5
10
15
20
25
Number of stops for relubrication during 5 years
3
21
Self-aligning ball bearing 2206 E
Spherical roller bearing 22206 E
Deep groove ball bearing 6206
Y-unit YAT 206
Example:Fr = 1190 NFa = 100 Nn = 2000 r/min
Self-aligning ball bearingsPubl. No. 4847 E
19
Bearing friction
Self-aligning ball bearingsPubl. No. 4847 E
20
80
60
70
40
50
10
20
30
0
Fri
ctio
nal m
omen
t [N
mm
]
1000 2000 3000 4000 5000 6000 7000
Deep groove ball bearing 6210
Self-aligning ball bearing 1210Standard (36 balls)
Self-aligning ball bearing 1210Special (18 balls)
Speed [r/min]
Vibration
Self-aligning ball bearingsPubl. No. 4847 E
21
246
120
70
80
100
90
110
60
50
20
10
40
30
0SKF FAG ZKL KOYO NTNNSKSNR
[µm/s]
Investigated bearing size: 2206
Low band
120
70
80
100
90
110
60
50
20
10
40
30
0SKF FAG ZKL KOYO NTNNSKSNR
[µm/s] Medium band
Q77 = 90Q66 = 90
Q77 = 125
Q66 = 45
Vibration
Self-aligning ball bearingsPubl. No. 4847 E
22
180
170
160
120
70
80
100
90
110
60
50
20
10
40
30
0SKF FAG ZKL KOYO NTNNSKSNR
[µm/s]
Investigated bearing size: 2206
High band
120
70
80
100
90
110
60
50
20
10
40
30
0SKF FAG ZKL KOYO NTNNSKSNR
[µm/s] Peak band
Q66 = 90
Q77 = 180
Q77 = 63
Q66 = 31,5
Bearing clearance
Self-aligning ball bearingsPubl. No. 4847 E
23
40
50
30
20
10
0SKF FAG NSK ZKL SNR
Rad
ial c
lear
ance
[µm
]
Uppertolerance
limit
Lowertolerance
limit
Investigated bearing size: 2206
Self-alignmentSelf-aligning capability
of different bearing types
2
3
1
Max. misalignment [degrees]
Least favourable bearing size
Y-unit Deep groove ball bearing
Spherical roller bearing
Self-aligning ball bearing
1,5
0,2
Self-aligning ball bearingsPubl. No. 4847 E
24
Most favourable bearing size
00,04
Basic designs
OpenExtendedinner ringSealed
Self-aligning ball bearingsPubl. No. 4847 E
25
Sealed bearings greased for life
Convenientto use
Environmentallyfriendly
Longer bearingservice life
Protected fromcontaminants
during handlingand operation
Nitrilerubber
Steelplate
Maintenance-free
No grease leakageinto the
environment
Self-aligning ball bearingsPubl. No. 4847 E
26
SKF E design
Moreballs
and/or
Largerballs
Up to 30%
higherload
carrying capacity
Longer service life
or
possible to downsize application
Self-aligning ball bearingsPubl. No. 4847 E
27
Cage designs
Polyamide 6.6 Pressed steel Machined brass
Self-aligning ball bearingsPubl. No. 4847 E
28
Long bearing
service life
Polyamide cage
Increased carrying capacity
Smoothrunning
Favourablein vibratingapplications
Allowsoptimiseddesign (E)
Very highspeed rating
Lightand
flexible
Gooddamping
propertiesLow
operating temperature
Self-aligning ball bearingsPubl. No. 4847 E
29
Size range of SKF self-aligning ball bearings
Smallest: 19 mm / 0,009 kgLargest : 240 mm / 17,5 kg
Self-aligning ball bearingsPubl. No. 4847 E
30
23-2RS1231312 112 22 22-2RS1
SKF self-aligning ball bearing series
Self-aligning ball bearingsPubl. No. 4847 E
31
The product
range
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
22
24
26
12 22 13 23 14 112
Series
Design
Size E E E-2
RS1
E E E-2
RS1
E
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K
K K
K
K
K
K
K
K
K
K
K
K
K KK
135 5
6
7
8
9
126
127
108
129
Small sizes
Size Bore (mm)
*
K
K
Sealed design
* Not E design
Open design
K Also with tapered bore
Self-aligning ball bearingsPubl. No. 4847 E
32
Long bearing
service life
Wide choice and
design flexibility
Axially freeor fixed
Widest rangeof seals
Grease or oillubrication
Precision in manufacturing
Excellent bearingrunning accuracy
...for better bearing performance
SKF housings
Self-aligning ball bearingsPubl. No. 4847 E
33
SKF self-aligning ball bearing
kit
Self-aligning ball bearingsPubl. No. 4847 E
34
ü Quick and safe mounting
ü One item to plan, source and stock
ü Always the right components
ü All components in SKF quality
Different methods of mounting
Interference fit(Cylindrical bore)
Set screw locking(Wider inner ring; loose fit)
Adapter sleeve(Tapered bore)
Self-aligning ball bearingsPubl. No. 4847 E
35
Easy mounting on adapter sleeve...with SKF hook spanner (Method A)
1 3 4
5 6
9 10 118
2
7
180° 120° 90°
70°
Re-position the hook spanner
Bore diam.
20-50 mm
Bore diam.
55-70 mm
Bore diam.75-110 mm
Self-aligning ball bearingsPubl. No. 4847 E
36
Because it is cost efficient!The SKF self-aligning ball bearing makes it possible to * increase machine productivity* minimise maintenance* reduce machine weight and make machines more compact
Publ. No. 4847 E
37