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).
Report from a bearing company detailing five comparative tests on bearings under different lubrication and material conditions.
Identifier | ExFiles\Box 114\2\ scan0032 | |
Date | 6th April 1934 | |
RANSOME & MARLES BEARING Co., Ltd. - 2 - Messrs. Rolls-Royce, Limited, D E R B Y . 6-4-34. row of balls taking thrust loads, and one row taking journal loads, the thrust being 2840 lbs. and the journal 2100 lbs. Lubrication was by 'D.T.E.' Heavy oil and wick feed, and after five hours' run, failure of the cage occurred owing to insufficient lubrication. SECOND TEST : An identical bearing to that used for the first test, and under the same loading conditions, was run but with a continuous supply of oil (this being Rust-Veto) and this ran for thirty-nine hours, at which time slight overload failure was evident. THIRD TEST : The modified MDJT.30 bearing, our 3/MDJT.30 fitted with a brass cage was run under identical conditions to the second test, for one hundred hours, the condition being in every way satisfactory. FOURTH TEST : An identical bearing to that used for the third test, but fitted with a steel cage and lubricated by a continuous supply of Whitmore oil was run for a period of nine hours, at which stage, excessive wear of the outside diameter of the inner occurred, due to cage friction. FIFTH TEST : This test was instituted to ascertain the | ||