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NORTHNORTH0º0º
NORTH EASTNORTH EAST045º045º
SUDHIR PATEL L.J.
POLYTECHNIC,A'BADMISSAM RAZA Dept. -Mechanical LJ Polytechnic
1. Measured from North.
2. In a clockwise direction.3. Written as 3 figures.
N
S
EW
N
S
EW
N
S
EW
060o
145o230o
315o
60o
145o
230o 315o
Bearings
N
S
EW 090o
360/000o
270o
180o
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
N
S
EW 090o
360/000o
270o
180o
A protractor is used to
measure bearings.
SE
135o
SW
225o
NW
315o
NE
045o
Worksheet 1MISSAM RAZA Dept. -Mechanical LJ
Polytechnic
360/000o
090o
180o
270oW E
N
S
Estimate the bearing of each aircraft from
the centre of the radar screen.030o
075o
045o
200o
135o
330o
225o
290o
110o250o
315o
170o
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
1. Draw a straight line between both points.2. Draw a North line at A.
3. Measure the angle between.
N060o
To Find the bearing of B from A.
B
A
Worksheet 3MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
1. Draw a straight line between both points.2. Draw a North line at B.
3. Measure angle between (a take from 360).
N
240o
To Find the bearing of A from B.
B
A
Worksheet 3MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
N060o
B
A
N
240oHow are the bearings of A and B from each other related and why?
Worksheet 3MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
1. Draw a straight line between both points.2. Draw a North line at P.
3. Measure angle between.
N
P
Q
To Find the bearing of Q from P.
118o
Worksheet 3MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
1. Draw a straight line between both points.2. Draw a North line at Q.
3. Measure angle between (take from 360).
N
P
Q
To Find the bearing of P from Q.
298o
Worksheet 3MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings
Measuring the bearing of one point from another.
N
P
Q
118o
N
298o
How are the bearings of A and B from each
other related and why? Worksheet 3
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
A1. 2. 3.
4. 5. 6
D S
M
P
V
W
Q
T
N
B C
Bear ingsBearings are M easured1. From N orth2. Clockw ise3. Using 3 figures
Find the b e a ring s o f the fo llo w ing :1 . A fro m B 4 . M fro m N2. C fro m D 5 . P fro m Q3. T fro m S 6 . V fro m W
N030
060
090
120
150
180
210
240
270
300
330
360/000
W E
S
Worksheet 4MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings : Fixing Position
Trainee pilots have to to learn to cope when the unexpected happens. If their navigation equipment fails they can quickly find their position by calling controllers at two different airfields for a bearing. The two bearings will tell the pilot where he is. The initial call on the controllers radio frequency will trigger a line on the radar screen showing the bearing of the calling aircraft.
Airfield (A)283.2 MHZ UHF
Airfield (B)
306.7 MHZ UHF050o
300o
Thankyou
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Bearings : Fixing Position
Trainee pilots have to to learn to be cope when the unexpected happens. If their navigation equipment fails they can quickly find their position by calling controllers at two different airfields for a bearing. The two bearings will tell the pilot where he is. The initial call on the controllers radio frequency will trigger a line on the radar screen showing the bearing of the calling aircraft.
Airfield (A)283.2 MHZ UHF
Airfield (B)
306.7 MHZ UHFThankyou
170o
255o
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
A
B
1. Find the position of a point C, if it is on a bearing of 045o from A and 290o from B.
C
2. Find the position of a point D if it is on a bearing of 120o from A and 215o from B.
DWorksheet 5MISSAM RAZA Dept. -Mechanical LJ
Polytechnic
My Estimated Bearing
True Bearin
gError
1
2
3
4
5
6
7
8
9
10
11
12
Total Error
Average Error
Worksheet 2 (Radar)
My Estimated Bearing
True Bearin
gError
1
2
3
4
5
6
7
8
9
10
11
12
Total Error
Average Error
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Whiteboard PORTRAIT
Make a table like this
My Estimated Bearing
True Bearing Error
1
2
3
4
5
6
7
8
9
10
Total Error
Average Error
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
A1. 2. 3.
4. 5. 6
D S
M
P
V
W
Q
T
N
B C
BearingsBearings are Measured1. From North2. Clockwise3. Using 3 figures
Find the bearings of the following:1. A from B 4. M from N2. C from D 5. P from Q3. T from S 6. V from W
N030
060
090
120
150
180
210
240
270
300
330
360/000
W E
S
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
A
B
1. Find the position of a point C, if it is on a bearing of 045o from A and 290o from B.
2. Find the position of a point D if it is on a bearing of 120o from A and 215o from B.
Worksheet 5MISSAM RAZA Dept. -Mechanical LJ
Polytechnic
Thrust ball bearing Thrust ancular contact ball bearing
Thrust cylindrical roller bearing
Thrust spherical roller bearing
Radial-Ball Bearings
Radial-Roller Bearings
Deep groove ball bearing
Ancular contact ball bearingSingle row douple row
Four point ball bearing
Self aligning ball bearing
Cylindrical roller bearing
Tapered roller
bearing
Barrel roller bearing
Spherical roller bearing
Bearing types
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: good
Axial load: good
Alignment: dependent on the load, between 2‘ and 16‘
Limiting speed: high to very high
Remark: most widely used and reasonably price
Deep groove ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Deep groove ball bearing
Series: 60, 62, 63, 64,
160, 161, 618, 622, 623
Suffixes:
M solid brass cage
.2RS, .2RSR two seals
.W203B stainless steel
.2Z, .2ZR two shields
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: good
Axial load: high in one direction
Alignment: very small
Limiting speed: high, spindle bearing very high
Remark: good for X, O and Tandemarrangement
Angular contact ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Angular contact ball bearing
Series: 72B, 73B
Suffixes:
MP solid window brass cage
TVP solid window polyamide cage
UA universal design, pairs have a small axial clearance
UO universal design, pairs have a zero clearance
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Spindle bearingSeries: B719, B70, B72
HSS719, HSS70
Suffixes:
C contact angle 15°
E contact angle 25°
P4S tolerance class P4S
T solid window-type cage of textile laminated phenolic resin
UL universal design, pairs are lightly preloaded
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: good
Axial load: high in both direction
Alignment: very small
Limiting speed: high
Angular contact ball bearing-douple row
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Series: 32, 33 contact angle 35°
32B, 33B contact angle 25°
33DA contact angle 45°
Suffixes:
M machined brass cage
MA solid brass cage, outer ring guided
TVP solid window polyamide cage
TVH moulded snap type cage of glass-fibre reinforced polyamide
.2RSR two seals
.2ZR two shields
Angular contact ball bearing-douple row
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: small
Axial load: high in both directions
Alignment: very small
Limiting speed: medium to high
Remark: inner ring split, large complement of balls
Four point ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Four point ball bearing
Series: QJ2, QJ3
Suffixes:
MPA machined window-type brass cage, outer ring guided
N2 two retaining grooves
TVP solid window-type cage of glass-fibre reinforced polyamide
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: small
Axial load: small
Alignment: approx. 4°, sealed types up to 1,5°
Limiting speed: high Remark: insentive to misalignment and shaft deflection
Self aligning ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Series: 10, 12, 13, 22, 23, 112
Suffixes:
K tapered bore
M machined brass cage
.2RS two seals
TV solid cage of glass-fibre reinforced polyamide
Self aligning ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: very high
Axial load: none, small when bearings have lips
Alignment: very small, between 1‘ and 4‘
Limiting speed: high to very high
Remark: seperable, well suited for floating bearings
Cylindrical roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Series: NU2E, NU3E, NU10, NU19, NU22E, NU23E
Suffixes:
E maximum capacity design
M, M1 machined brass cage
TVP2 solid window-type cage of glass-fibre reinforced
polyamide
Cylindrical roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Cylindrical roller bearing
a
NUP N NJ u. HJ NU u. HJNU NJ
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: very high
Axial load: none, lips can carry small thrust loads
Alignment: very low
Limiting speed: high to very high
Cylindrical roller bearing, douple row
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Series: NN30,
NNU49
Suffixes:
S lubricating groove
K tapered bore
M machined brass cage
SP tolerance class SP, bearing clearance C1NA
Cylindrical roller bearing, douple row
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: very high
Axial load: high in one direction, matched in both directions
Alignment: small 1‘ to 4‘
Limiting speed: medium to high
Remark: seperable, X and O-Arrangement possible
Tapered roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Series: 302, 303, 313, 320, 322, 323, 329, 330, 331, 332
Suffixes:
A changed internal design
A...N11CA axial clearance in µm, two X arranged bearings with
spacers between the cups
B increased contact angle
X outer dimensions adapted to international standards
Tapered roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: very high
Axial load: small
Alignment: very high, up to 4°
Limiting speed: low to medium
Remark: good for high loads and misalignment
Barrel roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Barrel roller bearing
Series: 202, 203
Suffixes:
K tapered bore
MB machined brass cage, inner ring guided
T solid window-type cage of glass-fibre reinforced
polyamide
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: very high
Axial load: good
Alignment: good, between 0,5° to 2°
Limiting speed: low to medium
Remark: for heavy duty features, compensate misalignment
Spherical roller bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Spherical roller bearingSeries: 213, 222, 223, 230, 231,
232, 233, 239, 240, 241
Suffixes: A, B changed internal design
E maximum capacity design
K tapered bore
M machined brass cage
MA machined brass cage, outer ring guided
MB machined brass cage, inner ring guided
TVPB solid window-type cage of glass-fibre reinforced polyamide, inner ring
guided
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Spherical roller bearing
MAA.MA.T41AB.MA
MBA.MBB.MB
EE.T41A
(YPB2)B(YPB2) B(JPB1)
EAS.M ES.TVPB
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Spherical roller bearing
22332...22352A.MA.T41Az.B. 22340A.MA.J24BA.T41A
22308...22330E.T41Az.B. 22328E. J24BA.T41A
T41A = Restricted diameter tolerances and C4-Radial ClearanceJ24BA = Bore with Thin-Layer Chromium Plating
MISSAM RAZA Dept. -Mechanical LJ Polytechnic
Radial load: none
Axial load: high
Alignment: none
Limiting speed: medium
Remark: spherical housing washers can compensate misalignment
Thrust ball bearing
MISSAM RAZA Dept. -Mechanical LJ Polytechnic