Railway bearings are critical components that enable the smooth rotation of train wheels while supporting the entire weight of the train. They reduce friction between the stationary axle box and the rotating axle, ensuring safe and efficient train operation.
Class | Bearing Number | id | OD | C | Dynamic Rating @ 500 RPM For 3000 hr L10 | |||
Kt | Outer Race Width | |||||||
mm | mm | mm | mm | Radial, C90 | Thrust, Ca90 | |||
in. | in. | in. | in. | n | n | K Factor (4) | ||
lbf | lbf | |||||||
B (4 1⁄4 x 8) | HM120848 HM120817XD | 101.6 | 165.1 | 91.3 | 114.3 | 120000 | 31000 | 2.21 |
4 | 6.5 | 3.59 | 4.5 | 26900 | 7000 | |||
C (5 x 9) | HM124646 HM124618XD | 119.062 | 195.262 | 108.7 | 142.875 | 172000 | 44500 | 2.21 |
4.6875 | 7.6875 | 4.28 | 5.625 | 38600 | 10000 | |||
D (5 1⁄2 x 10) | HM127446 HM127415XD | 131.75 | 207.962 | 113.5 | 152.4 | 186000 | 48500 | 2.21 |
5.187 | 8.1875 | 4.47 | 6 | 41800 | 10900 | |||
E (6 x 11) | HM129848 HM129814XD | 144.45 | 220.662 | 120.6 | 163.512 | 195000 | 50700 | 2.21 |
5.687 | 8.6875 | 4.75 | 6.4375 | 43800 | 11400 | |||
F (6 1⁄2 x 12) | HM133444 HM133416XD | 157.15 | 252.412 | 136.5 | 184.15 | 266000 | 69000 | 2.21 |
6.187 | 9.9375 | 5.38 | 7.25 | 59700 | 15500 | |||
G (7 x 12) | HM136948 HM136916XD | 177.787 | 276.225 | 134.9 | 185.725 | 305000 | 79200 | 2.21 |
6.9995 | 10.875 | 5.31 | 7.312 | 68600 | 17800 | |||
G (7 x 14) | HM136948 HM136916XD | 177.787 | 276.225 | 134.9 | 185.725 | 305000 | 79200 | 2.21 |
6.9995 | 10.875 | 5.31 | 7.312 | 68600 | 17800 | |||
GG (7) | H337846 H337816XD (3) | 177.787 | 301.701 | 139.7 | 196.85 | 388000 | 132110 | 1.69 |
6.9995 | 11.878 | 5.5 | 7.75 | 87300 | 29700 | |||
K (8) | M241547 M241513XD | 203.2 | 301.625 | 108 | 140.097 | 266000 | 86800 | 1.76 |
8 | 11.875 | 4.25 | 5.5156 | 59700 | 19500 |