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 Borg-Warner Corporation discussing clutch cushioning, anti-squeak plates, and manufacturing.
| Identifier | ExFiles\Box 130\3\ scan0198 | |
| Date | 6th March 1941 guessed | |
| Copy for -3- this cushioning formed directly in the rim section. While this probably has nothing to do with the present complaint, if this is actual deflection under load it would appear to us that the control of the clutch must be rather critical. Our general practice here is to aim at around .050 maximum deflection in the disc when compressed solid and the load required to compress solid we try to keep just slightly above maximum spring load. On the Cadillac clutch only, we insert some anti-squeak plates, part C-5161, between the driving lug and the slot in the cover stamping on the side which takes the driving torque. These are made of copper lead zinc bearing metal and effectively eliminate squeaks. When you have gone over this, if there is further information we can give you or if we can help you in any other way, let us know. We are glad to know that you are still manufacturing passenger car clutches and I know we all hope that the time is not too far off when conditions come back to normal. With best regards to you and your organization, we remain Yours very truly, LONG MANUFACTURING DIVISION BORG-WARNER CORPORATION (signed) R.C. Zeidler Asst. Engineering Manager. | ||