Test report on the Bentley 50 rear axle, specifically concerning the differential gearbox's Belleville washer and Timken bearing.
| Identifier | ExFiles\Box 111\4\ scan0085 | |
| Date | 22th November 1938 | |
| 802 To Ry. from HPS {Horace Percy Smith - Experimental Factory Mgr} /W.Bell. c. to Rm. {William Robotham - Chief Engineer} c. to Da. {Bernard Day - Chassis Design} c. to Hdy. {William Hardy} HPS {Horace Percy Smith - Experimental Factory Mgr} /WB. {Mr Brazier / Mr Bell} 2/CB.22.11.38. BENTLEY 50 REAR AXLE TESTS. G.C.D. 839. Differential Gear Box. Belleville Washer Rating Test. GB.3980. A set of 4 Belleville washers was fitted up so that a compressive load could be applied to represent axle shaft conditions, the deflection being measured at various loads. New washers were tested and also some that had done a considerable amount of running, but no difference was found in the rating, which worked out in both cases to 9,600 lb./in. Timken Bearing Outer Race Expansion Test. A Timken thrust bearing was loaded on the inner race, forcing it into the taper of the outer race, and the expansion or distortion of the outer race measured. A maximum load of 1,500 lb. was applied and the outer race tended towards ovality, the maximum expansions at right angles being .0005" and .0010". R.M.L. HPS {Horace Percy Smith - Experimental Factory Mgr} /W.Bell. | ||
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).