Timken Super Precision Bearings for Machine Tool Applications

ENGINEERING
PRECISION CLASS TAPERED ROLLER BEARINGS – HYDRA-RIB
The Hydra-Rib cup is designed to be mounted either as a flanged cup or shouldered against the cup
backface. The 50.000 mm (1.968 in.) bore assembly does not have a flanged cup and the cup backface
must be mounted against the housing shoulder.
A
SUGGESTED FITTING GUIDELINES FOR FERROUS SHAFT AND HOUSING
For heavy loads, high speed or shock, contact your Timken representative for further information.
SHAFT O.D.
Deviation from nominal (maximum) bearing
bore and resultant fit.
T= Tight
L = Loose
Bearing bore Class C Class B
Range
Bearing
Shaft
Bearing
Shaft
bore
O.D. Resultant bore
O.D.
Over Incl. tolerance Symbol deviation fi t tolerance Symbol deviation
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
Resultant
fi t
30.000 50.000 -0.010 k5 +0.013 0.023T -0.010 k5 +0.013 0.023T
0.000 +0.002 0.002T 0.000 +0.002 0.002T
1.1811 1.9685 -0.0004 +0.0005 0.0009T -0.0004 +0.0005 0.0009T
0.0000 +0.0001 0.0001T 0.0000 +0.0001 0.0001T
50.000 80.000 -0.013 k5 +0.015 0.028T -0.010 k5 +0.015 0.025T
0.000 +0.002 0.002T 0.000 +0.002 0.002T
1.9685 3.1496 -0.0005 +0.0006 0.0011T -0.0004 +0.0006 0.0010T
0.0000 +0.0001 0.0001T 0.0000 +0.0001 0.0001T
80.000 120.000 -0.013 k5 +0.018 0.031T -0.010 k5 +0.018 0.028T
0.000 +0.003 0.003T 0.000 +0.003 0.003T
3.1496 4.7244 -0.0005 +0.0007 0.0012T -0.0004 +0.0007 0.0011T
0.0000 +0.0001 0.0001T 0.0000 +0.0001 0.0001T
120.000 180.000 -0.013 k5 +0.021 0.034T -0.010 k5 +0.021 0.031T
0.000 +0.003 0.003T 0.000 +0.003 0.003T
4.7244 7.0866 -0.0005 +0.0008 0.0013T -0.0004 +0.0008 0.0012T
0.0000 +0.0001 0.0001T 0.0000 +0.0001 0.0001T
180.000 250.000 -0.015 k5 +0.024 0.039T -0.013 k5 +0.024 0.037T
0.000 +0.004 0.004T 0.000 +0.004 0.004T
7.0866 9.8425 -0.0006 +0.0010 0.0016T -0.0005 +0.0010 0.0015T
0.0000 +0.0002 0.0002T 0.0000 +0.0002 0.0002T
mm
in.
HOUSING BORE Bearing O.D. Class C Class B
Deviation from nominal (maximum) bearing
O.D. and resultant fit.
T= Tight
L = Loose
Range
Bearing
O.D.
tolerance
Housing
bore
deviation
Resultant
fi t
Bearing
O.D.
tolerance
Housing
bore
deviation
Resultant
fi t
Over Incl.
Symbol
Symbol
mm mm mm
mm mm mm
mm mm
in. in. in.
in. in. in.
in. in.
80.000 120.000 0.000 M5 -0.023 0.023T 0.000 M5 -0.023 0.023T
-0.013 -0.008 0.005L -0.010 -0.008 0.002L
3.1496 4.7244 0.0000 -0.0009 0.0009T 0.0000 -0.0009 0.0009T
-0.0005 -0.0003 0.0002L -0.0004 -0.0003 0.0001L
120.000 180.000 0.000 M5 -0.027 0.027T 0.000 M5 -0.027 0.027T
-0.013 -0.009 0.004L -0.010 -0.009 0.001L
4.7244 7.0866 0.0000 -0.0011 0.0011T 0.0000 -0.0011 0.0011T
-0.0005 -0.0004 0.0001L -0.0004 -0.0004 0.0000
180.000 250.000 0.000 M5 -0.031 0.031T 0.000 M5 -0.031 0.031T
-0.015 -0.011 0.004L -0.013 -0.011 0.002L
7.0866 9.8425 0.0000 -0.0012 0.0012T 0.0000 -0.0012 0.0012T
-0.0006 -0.0004 0.0002L -0.0005 -0.0004 0.0001L
250.000 315.000 0.000 M5 -0.036 0.036T 0.000 M5 -0.036 0.036T
-0.020 -0.013 0.007L -0.015 -0.013 0.002L
9.8425 12.4016 0.0000 -0.0014 0.0014T 0.0000 -0.0014 0.0014T
-0.0008 -0.0005 0.0003L -0.0006 -0.0005 0.0001L
315.000 400.000 0.000 M5 -0.039 0.039T – – – –
-0.020 -0.014 0.006L – – – –
12.4016 15.7480 0.0000 -0.0015 0.0015T – – – –
-0.0008 -0.0006 0.0002L – – – –
TIMKEN MACHINE TOOL CATALOG 81