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 a 'Perfect Seal' gland for a Bentley Rear Axle, including results from various run conditions.
| Identifier | ExFiles\Box 84\4\ scan0040 | |
| Date | 8th October 1934 | |
| COPY x202 To Rm{William Robotham - Chief Engineer}: 8.10.34. Bentley Rear Axle - GB.619. "Perfect Seal" Glands. Further to Report 1.10.34. With a sleeve 1.125" diameter fitted over the axle shaft to give more contact surface with the same type of "Perfect Seal" gland as previously used - 1" diameter - the shaft was again run for a period, with a jet of warm (45ºC) Whitmore's oil spraying directly on to the gland, followed by a further run, dry, and finally again with warm oil. Prior to these tests, the gland was immersed for 15 minutes in oil at 100ºF.{Mr Friese} as per makers' instructions. There was no sign of leak past the gland along the shaft, but, although the retainer was pressed into the housing, there was a slight trace of oil having leaked past the outer periphery - probably due to distortion of the housing. When examined the leather was soft and pliable, and showed no signs of distress. The following table shows the times, and conditions, of the test runs | Axle Shaft R.P.M. | Time Run. | Conditions. | |-------------------|-------------|------------------------------| | 700 | 4 hr, 15 m.{Mr Moon / Mr Moore} | Oil at 45ºC. | | 1000 | 13 " 15 " | Oil at 45ºC. | | 1000 | 5 " 30 " | Shaft cleaned then run "dry".| | 1000 | 2 " 0 " | Oil at 45ºC. | Throughout the tests the shaft was tilted at an angle of 30º to the horizontal. Hs{Lord Ernest Hives - Chair}/W.Bell. | ||