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).
Comparison of capabilities and costs for different gear cutting machines.
| Identifier | ExFiles\Box 176\2\ img010 | |
| Date | 19th January 1940 | |
| (C.Rm{William Robotham - Chief Engineer} Foundry) JHH. GEAR CUTTING MACHINES. Wallworks Gear Hobbing Machine. Type 'B' (Will not do internal Gear, but will do Helical Gears). -------------------- Fellows. No. 6. Will do internal - Spur. (Will not do spiral). Tool Cost. £30 approx. Tools. £45 " with cutters. for each condition. -------------------- Drummond Maxicut too limited. -------------------- | ||