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).
Updated procedures for the Bijur lubrication of axles, addressing oil quantity and pressure.
| Identifier | ExFiles\Box 27\1\ Scan309 | |
| Date | 1st January 1930 | |
| To Da.{Bernard Day - Chassis Design} From Hs{Lord Ernest Hives - Chair}/Tsn. c.c. to By.{R.W. Bailey - Chief Engineer} XS806 Hs{Lord Ernest Hives - Chair}/Tsn.1/MJ.1.1.30. X.3806 X.7350 X.7420 X.5350 X.5420 BIJUR LUBRICATION OF AXLES. We have discovered that it is much harder than was originally thought to get a decent charge of oil into the front and rear axles on our cars. The principal obstruc-tion is the felt filter in the oil-gun nipple. We are recommending an additional page be circulated for inclusion in all Instruc-tion Books, as shewn attached, and are also writing to Depots. The quantity we recommend for each axle is ¼" of piston travel in the oil gun, or .600 cu.ins. (# 10 c.c.), when a pressure of approx. 60 lbs. will be developed in the Bijur pipe at the back of the axle. Actually it is possible to get ½" of piston movement on the front axle, and ⅝" on the rear axle, and not until the axle is nearly full is it possible to get pressures as high as 200/sq.in. The pressures were measured by a gauge attached to the Bijur pipe as close as possible to the filling point. We have no anxiety about blowing off Bijur caps or bursting pipes with the new recommen-dations. As regards time taken to oil an axle, we have found that we could oil five front axles, on 20 HP. and 40/50 cars, old and new, under a quarter of an hour, giving each axle twice as much as we now recommend, or ½" piston travel. We do not think anyone would have to spend more than two minutes at the task of oiling an axle, but could usually do it in one minute. | ||