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).
Difficulties with Bijur lubrication of axles and recommending a new procedure.
| Identifier | ExFiles\Box 12\1\ 01-page141 | |
| Date | 1st January 1930 | |
| To Da.{Bernard Day - Chassis Design} From Hs{Lord Ernest Hives - Chair}/Tsn. c. to By.{R.W. Bailey - Chief Engineer} HS{Lord Ernest Hives - Chair}/Tsn.1/W.J.1.30. X7420 13806 x7420 x7360 x5420 x5358 BIJUR LUBRICATION OF AXLES. We have discovered that it is much harger than was originally thought to get a decent charge of oil into the front and rear axles on our cars. The principal obstruction is the felt filter in the oil-gun nipple. We are recommending an additional page be circulated for inclusion in all Instruction Books, as shewn attached, and are also writing to Depots. The quantity we recommend for each axle is ½" 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 ¼" of piston movement on the front axle, and ½" 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 recommendation. 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, in under a quarter of an hour, giving each axle twice as much as we now recommend, or 1", 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. | ||