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).
Manufacturing process for a fully corrected pinion and gear, considering cutting versus grinding methods.
| Identifier | ExFiles\Box 64\4\ scan0048 | |
| Date | 21th October 1927 | |
| c. R.{Sir Henry Royce} c. BJ. c. Hs.{Lord Ernest Hives - Chair} c. EFC. c. WOR.{Arthur Wormald - General Works Manager} X7655B BYS/G.21.10.27. SEQUENCE STARTER. ---------------- X765573 Referring to R4/M.20.10.27. we have already got a scheme mapped out for using a fully corrected pinion and gear. We propose in the first place to try these gears out as cut with our best equipment. If these are still noisy we then propose to try grinding same. The reason we are not going directly to grinding is that with the pitch of teeth we are using viz. 12 D.P. very little work has been done in relation to producing these in a ground condition. They are too small for our plant at Derby or for any plant at present made by the Lees Bradner, and are on the small side for the Gear Grinding Co. who do not like these small pitches. The small pitch is imposed upon owing to the gear reduction required viz. 16 to 1. In a single reduction this means that we cannot go above a 12 D.P. at which we should have pinion 12 teeth and wheel 192 teeth. We are also trying 10 D.P. with a corresponding ratio. We shall cut the gears on the felloes shaper BY BY.{R.W. Bailey - Chief Engineer} | ||