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).
Hypoid axle test of Wakefield's 'Castrol' lubricant.
| Identifier | ExFiles\Box 145\2\ scan0221 | |
| Date | 21th February 1929 | |
| HS.{Lord Ernest Hives - Chair} HYPOID AXLE TEST OF WAKEFIELD'S 'CASTROL'. In response to our letter written to the Gleason Co., the latter have put through a test with Wakefield's 'Castrol R' on a Hypoid axle. They give particulars of the actual axle with which they have tried it out, but personally I should not rely much upon the information supplied. The length of tooth on the gear with which the oil was tried is short, face length only being 1½", the pinion was 2" below the gear centre instead of 1", and the spiral angles were 17 and 40° approx. respectively. Our spiral angles are - wheel 29, pinion 40. The H.P. transmitted through the small gears is 60°. The discrepancies are so great between the gears actually tried and those we propose to use that one sees very little value in the test except that they can carry a higher load with their lubricant than would be possible with Wakefield's Castrol R.{Sir Henry Royce}, but with our proportion of gears it is quite possible that Wakefield's Castrol R.{Sir Henry Royce} would easily carry the load imposed. One would put much more faith in a dynamometer test of the axle at our Works, particularly as the Gleason Co. have from the start been very anxious to push the special lubricant made up with lead soap which they used in their test No. 302B. BY.{R.W. Bailey - Chief Engineer} | ||