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).
Instructions on the careful use of the Enots grease gun on chassis with blind-ended bearings to prevent damage.
| Identifier | ExFiles\Box 51\3\ Scan107 | |
| Date | 25th November 1926 | |
| Wor. {Arthur Wormald - General Works Manager} COPY. USE OF ENOTS GREASE GUN ON CHASSIS. Referring to C6/C20-11-26, I think it is very desirable that we should send an instruction sheet round to owners of both 40/50HP and 20HP chassis, pointing out that the Enots Grease Gun with an intensifier must be used with care, particularly where a bearing to be lubricated has a blind end, and the bearing itself is carried as a part of an arm or bracket at some distance from the support. Two pa {Mr Paterson} rticular instances which would illustrate the point in question are the blind ended brackets supporting the inner end of the actuating shafts for the rear brakes, on both 40/50HP and 20HP chassis. These bearings are blind-ended, that is to say, the shaft does not go clean through, the bearing having the inner end as a solid face. The result of the use of a grease gun with undue pressure, or the intensifier even more so, being that 1200 lbs. to a square inch, in the latter case, can easily be produced on the oil film between the end of the shaft and the blind end of the bracket. Pressures of this magnitude are obviously too great for the bracket to stand without springing. These two examples will illustrate the need for using the grease gun with intelligent care, as the brackets in question are particularly stiff and well braeed, and yet can easily be sprung to such an extent that they will tend to temporarily lock the brakes if full grease gun pressure is brought to bear upon them so as to try and oil the bearing in a short space of time. The correct method to lubricate the bearing is to screw the gun up slowly, giving the oil time to work through the bearing, instead of trying to froce it through in a very short space of time by brute force. BY. {R.W. Bailey - Chief Engineer} | ||