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).
The thread specification for a Bendix Pinion.
| Identifier | ExFiles\Box 40\6\ Scan016 | |
| Date | 27th October 1921 | |
| X3592 RECEIVED R.{Sir Henry Royce} from BY.{R.W. Bailey - Chief Engineer} c. C.J. c. Hs.{Lord Ernest Hives - Chair} BY1-P27.10.21. BENDIX PINION. The number of threads on the Bendix Pinion specified from the D.O. were two, that is, a square thread with two starts. The leads of the thread were made in exact accordance with the Lucas, as we assumed that since the Lucas Starter was running that the pitch that they were using should be satisfactory. We are now awaiting the result of Hs.{Lord Ernest Hives - Chair} experiments when we will modify the lead of the thread to correspond with what he finds to be necessary. BY.{R.W. Bailey - Chief Engineer} | ||