NTN - Cylindrical and Tapered Roller Bearings

Dimensions and Ratings
r
r
H A C F
X V
R
Z U
A
C
F
H R r
U
V
X
Z
Basic
Bearing
Number
Inner
Ring
O.D.
Outer
Ring
I.D.
Inner
Ring
Rib
O.D.
Outer
Ring
Rib
O.D. I.D.
Maximum *
Fillet Radius
Shaft
Housing
Minimum Shaft
Shoulder Diameter
Plain Rings
Rib Rings
Maximum Housing
Shoulder Diameter
Plain Rings
Rib Rings
Basic
Bearing
Number
Inch/mm
1252 12.543 16.928 13.419 16.140 0.375 0.156 11.97 12.54 17.56 16.92 1252
318.59 429.97 340.84 409.96 9.52 3.96 304.0 318.5 446.0 429.8
5252 12.543 16.928 13.419 16.140 0.375 0.156 11.97 12.54 17.56 16.92 5252
318.59 429.97 340.84 409.96 9.52 3.96 304.0 318.5 446.0 429.8
1956 12.040 13.970 12.424 13.586 0.281 0.080 11.80 12.04 14.29 13.97 1956
305.82 354.84 315.57 345.08 7.14 2.03 299.7 305.8 363.0 354.8
1056 12.438 15.129 12.974 14.593 0.312 0.125 12.14 12.43 15.61 15.12 1056
315.93 384.28 329.54 370.66 7.92 3.18 308.4 315.7 396.5 384.0
1256 13.203 17.589 14.079 16.801 0.375 0.156 12.67 13.20 18.26 17.58 1256
335.36 446.76 357.61 426.75 9.52 3.96 321.8 335.3 463.8 446.5
5256 13.203 17.589 14.079 16.801 0.375 0.156 12.67 13.20 18.26 17.58 5256
335.36 446.76 357.61 426.75 9.52 3.96 321.8 335.3 463.8 446.5
1960 13.050 15.310 13.500 14.861 0.312 0.100 12.77 13.05 15.72 15.31 1960
331.47 388.87 342.90 377.47 7.92 2.54 324.4 331.5 399.3 388.9
1964 13.840 16.101 14.290 15.652 0.312 0.100 13.56 13.84 16.51 16.10 1964
351.54 408.97 362.97 397.56 7.92 2.54 344.4 351.5 419.4 408.9
* The maximum fillet on the shaft or in the housing that the bearing corner will clear.
61