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 a clutch manufacturer regarding wear allowance and adjustment for a clutch mechanism.
| Identifier | ExFiles\Box 129\2\ scan0121 | |
| Date | 22th November 1935 | |
| Telegrams BORGANBECK, LEAMINGTON SPA. Telephone LEAMINGTON SPA 1550-1. BORG & BECK COMPANY LTD. MANUFACTURERS OF CLUTCHES. Registered Office BROCK HOUSE, LANGHAM STREET, LONDON, W. I. WORKS: Tachbrook Road. LEAMINGTON SPA, Warwickshire. Directors E.{Mr Elliott - Chief Engineer} B. BOUGHTON. W. EMMOTT. D.{John DeLooze - Company Secretary} T. BROCK. Your Ref. Hs{Lord Ernest Hives - Chair}/Smth.27/KW. Our Ref. TSTB/LP{Mr Lappin} 22nd, November 1935. Messrs.Rolls-Royce Ltd., DERBY. Rm{William Robotham - Chief Engineer} Attention: Mr.F.D.Smith. Dear Sirs, We have to acknowledge receipt of your letter of the 21st instant and in reply would advise that we regard the 9/16" wear-in allowance of the release lever mechanism as a maximum. You will appreciate that this movement represents a total friction facing wear of .103" and there is considerable risk of the rivets, which secure the friction facings to the driven plate, scoring the pressure plate and flywheel if this dimension is exceeded. Our suggestion would, therefore, be that the rearward movement of the trunnion should be controlled to the dimension given on our Drawing No. SK.30604/2. Yours faithfully, BORG & BECK COMPANY LIMITED, Ll.Smith H.T.Barker H.T.Barker. [Handwritten note at bottom] When this clutch comes on production; the adjustment should be arranged so that it can compensate for two lining wear but not more Rm{William Robotham - Chief Engineer} | ||