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 Wakefield's Castrol Hi-press Excess Pressure Gear Lubricant.
| Identifier | ExFiles\Box 145\3\ scan0126 | |
| Date | 12th March 1937 | |
| TEST REPORT No. 753.B. (3). Test on Wakefield's Castrol Hi-press (Special E.P.) Excess Pressure Gear Lubricant. (Fig. No. 2.) OBJECT OF TEST. To try out extreme pressure oils under conditions of service of Automobile work and note the effect of the lubricant on the bearings, and particularly brass cages, arising out of requests by Messrs. Austin Motors Ltd. and Wolseley Motors Ltd. See our letter to Austin (CGH{W Clough}/BO) Jan.12th.1937 and Mr.Hickling's report on visit to Wolseley Motors (13th Jan) dated 21st Jan.1937. Ref. FOH/AD. See also C.C. Wakefield's correspondence in Tech.Office file and special "Excess Pressure Lubricants" file. BEARINGS. 5/MDJT.30. (Brass cages) LOAD. 1050 lbs. Journal. 1420 lbs. Thrust. SPEED. 4500 r.p.m. DURATION. 300 hours. LUBRICATION. Wakefield's Castrol Hi-press Gear Lubricant (pump feed). See Drg. T.R. 15.B. for arrangement of rig and oiling system. MAXIMUM TEMP. RISE. 88°F.{Mr Friese} NORMAL TEMP. RISE. 80°F.{Mr Friese} SHOP TEMPERATURE. 73°F.{Mr Friese} GENERAL REMARKS: A pump feed was fitted to obtain a churning effect of the oil, the lubrication of the bearing itself being drip feed controlled by a tap, the bulk of the oil being by-passed into the reservoir. Temperatures were taken on the outside of the housing and were satisfactory considering the loads and speeds, as also was the condition of the 5/MDJT.30 bearing, this showing heavy tracking but no signs of pitting on the tracks. The oil after a run of 300 hours was found to be in excellent condition, and all the working parts had been effectively lubricated. All the tracks showed signs of staining this having the appearance of a carbonaceous deposit and was confined to the tracks only, due, possibly, to the effect of local heat. This staining up to the present does not appear to have had any detrimental effect on the bearing. CONCLUSIONS DRAWN FROM TEST. This oil would be satisfactory as a ball or roller bearing lubricant in similar applications on automobile work, always providing that no factors can be introduced which are likely to cause chemical action in the lubricant and subsequent corrosion of bearing parts with which it comes into contact. | ||