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).
Test report on various axle, bearing, and brake components.
| Identifier | ExFiles\Box 83\2\ scan0299 | |
| Date | 13th March 1938 | |
| (5) Parts. Result of Test. Special .005" pre-load bearing for Rear Axle Pinion. After 5,100 miles running the pinion nose bearing failed. The thrust bearing was sent back to Derby for examination but was found to be O.K. Thick Rear Axle half shafts including Hoffman R.135.L.L. bearing for differential. 15,020 miles. No trouble experienced improvement on standard for trans-mission rattles. O.S. oil seal started to leak badly at end of mileage, but it was queried whether this might have been damaged when axle gears were changed. Strengthened Rear Wheel driving dogs in S/ZNCR with serrations in hubs modified to suit. 15,020 miles. Remained free from knocks and marked improvement over standard. Aluminium grease caps in rear hubs satisfactory and preferred to standard pressed caps and locking rings. Girling Rear Brakes, with MR.3 linings and Aluminium brake drums (Cast iron brake drums instructed for production) 15,020 miles. (13,268 miles on modified plungers and rear equaliser. 10,361 miles on MR.3 linings). Generally satisfactory in all respects. Besides considerably reducing cost and weight compared with standard Bentley rear brakes, a better rear braking system has been provided. The N.S. rod failed where screwed into the adaptor to the expander after 8,487 miles running. Rods with the eye connecting them to the expander formed in one piece and the other ends jumped up to allow a 5/16" thread on the 1/4 rod, have been called for, and 5/16" rods fitted temporarily for further running. Rattles experienced from main threaded support bearing of equaliser. A modification to overcome this has been called for. Deflection of the 3rd. cross member due to reaction from idler lever experienced which has been overcome by simple stay, and by equal T idler lever. | ||