Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparative load analysis table for rear axle pinion thrust bearings across various models.

Identifier  ExFiles\Box 84\4\  scan0295
Date  5th October 1937
  
REAR AXLE PINION THRUST BEARING COMPARATIVE LOADS

| | P II | P III | BENTLEY | RECOMMENDED FOR B III 30 x 83 x 1 5/16 |
|---|---|---|---|---|
| AXLE RATIO | 11/41 | 8/34 | 10/41 | |
| LOAD ON PINION NOSE ROLLER BRG. | | | | |
| TOP | 1480 | 2030 | 1220 | |
| 1ST SPEED | 5200 | 6000 | 3350 | |
| LOADS ON PINION THRUST BEARING | | | | |
| TOP | 1540 J, 1920 T | 2130 J, 3340 T | 1350 J, 2040 T | |
| 1ST SPEED | 5360 J, 6700 T | 6300 J, 9850 T | 3700 J, 5600 T | |
| RATED CAPACITY OF THRUST BEARING | 1800 | 1270 | 1000
1120 J, 1290 T | 1400 J, 1610 T |
| OVERLOAD FACTOR IN TOP GEAR | 1.37 | 1.68 J, 2.63 T | 1.35 J, 2.02 T
1.20 J, 1.58 T | 0.96 J, 1.27 T |

* FOR P II IT IS ASSUMED THAT THE THRUST HALF OF BEARING ALSO TAKES THE JOURNAL LOAD.
FOR P III & BENTLEY THE JOURNAL AND THRUST LOADS ARE TAKEN BY THEIR RESPECTIVE HALVES OF THE BEARING.
  
  


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