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 the effects of 'Filtrate' extreme pressure gear oil on bearings.
| Identifier | ExFiles\Box 145\3\ scan0130 | |
| Date | 14th April 1937 | |
| TEST REPORT No. 753.B. (5). Rig No. 1. Test on Extreme Pressure "FILTRATE" (regd.) Gear Oil. 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 (CGHH/BO) Jan. 12th, 1937, and Mr. Hickling's report on visit to Wolseley Motors (13th Jan.) dated 21st Jan. 1937, ref: FOH/AD, and subsequent correspondence. BEARING: 5/MDJT.30. (brass cage). LOAD: 1050 lbs. Journal, 1420 lbs. Thrust. SPEED: 4500 r.p.m. DURATION: 300 hours. LUBRICATION: Edward Hoy & Sons Ltd. Extreme Pressure "FILTRATE" (regd.) Gear Oil. (Pump feed.) See drg. No. T.R.15.B. for arrangement of rig and oiling system. MAXIMUM TEMP. RISE: 78°F.{Mr Friese} NORMAL TEMP. RISE: 75°F.{Mr Friese} SHOP TEMPERATURE: 70°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 signs of tracking and very slight pitting only. There was, however, considerable evidence of staining, particularly on the brass cages and tracks of the outers and inner; this staining had the appearance of a light copper deposit, but did not at the end of the test appear to have had any detrimental effect on the component parts of the bearing. The oil, after a run of 300 hours, was found to be in excellent condition, and all the working parts in the rig had been lubricated effectively. CONCLUSIONS: 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. | ||