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).
Letter providing detailed information on the properties, application, and limitations of a penetrating lubricant named 'Orel'.
| Identifier | ExFiles\Box 154a\2\ scan0101 | |
| Date | 1st March 1939 guessed | |
| - 2 - "Orel" is a new penetrating lubricant designed to stop squeaks and to provide lubrication for rubber bearings. "Orel" consists of a superior lubricant which does not swell or soften rubber and includes several penetrants designed to carry this lubricant into inaccessible places where ordinary lubricants cannot go. "Orel" has no destructive effect on rubber whatsoever. It does penetrate very rapidly and lubricates very effectively and actually preserves the rubber. The formula is not soluble in water, which means that it will last for a reasonable length of time, that it will not "wash out." The properties of "Orel" are such that in addition to being used as a rubber lubricant many users have reported it to be very effective on springs and other metal-to-metal contacts where squeaks are likely to prevail. It has been found effective for removing rusted nuts and in other similar applications where a penetrating oil is desired. It has been used to wipe tire side walls to give them a fresh new appearance. It can be used to wipe batteries clean. "Orel" applied to wheel rims will make the removal of sticking tires easy. "Orel" is easy to apply. For lubricating bushings, springs, etc., it should be applied with an oil can, giving a small stream. It can also be applied with a brush. It should not be sprayed because spraying causes the volatile solvents used to give "Orel" its superior penetrating power to evaporate before they can effectively carry the lubricant into the parts desired; the effectiveness of "Orel" is thus reduced. The directions suggested above should be carefully followed. "Orel" should not be spilled on the body finish nor used in places where it will come in contact with the body finish. It is not designed for use in pressure fittings and, of course, should not be used in the differential or transmission. We are attaching pamphlet and small demonstration card, showing you the type of advertising issued in the U.S. As we informed you on the telephone, we have received a 1-gallon tin of "Orel" following your original request, and we shall be pleased to forward this sample to you, provided you are willing to let us know the results of the test to which this sample will be put by your department. Yours faithfully, Sgd. F.G.Singer. | ||