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).
Instruction and production of helical gears, comparing hobbing with planing on a Fellowes machine.
| Identifier | ExFiles\Box 64\4\ scan0066 | |
| Date | 2nd January 1928 | |
| BY/PD. HS.{Lord Ernest Hives - Chair} EFC C. Wor.{Arthur Wormald - General Works Manager} C. RHC.{R. H. Coverley - Production Engineer} V/65573 BY6/G.2.1.28. RECEIVED SEQUENCE STARTER. Referring to R1/M23.12.27 apparently it will be necessary for us to instruct some further gears. This time R.{Sir Henry Royce} suggest a sharp engaging edge with a rounded off over-run, and apparently he would like this form of tooth tried first of all on a 5º helix. If this appears to be a distinct advance a further set would then be produced of 10º. We must of course arrange for the helical gears to be cut on the Fellowes machine, using the scheme for the production of helical teeth provided by the Fellowes Co. I do not think we shall get as good results by hobbing as we shall by the use of the Fellowes scheme, as hob teeth have one or two definite disadvantages compared with planed teeth. BY.{R.W. Bailey - Chief Engineer} BY | ||