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 from British Belting & Asbestos Ltd concerning 'Mintex 730' friction material for servo motor discs.
| Identifier | ExFiles\Box 141\3\ scan0051 | |
| Date | 7th April 1931 | |
| Y3409. BRITISH BELTING & ASBESTOS LTD. HALO NON-METALLIC CLUTCH AND BRAKE LININGS SCANDINAVIA COTTON CONE LINERS AND BONNET LINING MINTEX STANDARD WOVEN TYPE CLUTCH & BRAKE LININGS Technical Representative ERIC D.{John DeLooze - Company Secretary} DALMAINE Ullenhall. Nr.Henley-in-Arden. WARWICKSHIRE. 7/4/31. Mr.W.A.Robotham. Messrs.Rolls Royce Ltd. DERBY. Dear Sir. Further to our conversation on "Mintex 730" friction material, I have had compiled the comparative data for which you asked. It is enclosed herewith. I note that you have sent us details of the liners you require for test. With regard to the servo motor discs, you mention that the unit pressure can be as high as 100 lbs/sq.inch. I am surprised that the cotton rings stand up to this. The "Mintex 730" will certainly do so. I think the essential point to get a satisfactory action with this material is to have the rings nicely burnished and contacting evenly over their whole surface. I suggest that if you used these rings in production, you arranged to have the rings motored in position until highly burnished. I have asked our Works to burnish the sample rings they are sending you. Yours faithfully, D.Dalmaine. | ||