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 material specification and heat treatment for a new camshaft and rocker mechanism.
| Identifier | ExFiles\Box 43\3\ Scan157 | |
| Date | 7th April 1927 | |
| X4003 BY/BE. c.RHC.{R. H. Coverley - Production Engineer} c.HS.{Lord Ernest Hives - Chair} c.RG.{Mr Rowledge} C.Mr.Pendlebury. BY10/H.{Arthur M. Hanbury - Head Complaints} 7.4.27. ROLLS ROYCE F.10. CAMSHAFT & ROCKER MECHANISM. In the new camshaft and rocker mechanism of the roller-less type, one of the most important factors is the hardness of the material, and I therefore want to order rocker levers and camshaft in Ubas steel as well as some in our standard 5% case hardening nickel steel. For the moment I think we should only finish off one set of rockers and camshafts in our standard 5% case hardening nickel steel. We should order six sets of Ubas steel for all parts involved and arrange to have the second set produced in Ubas. Will RHC.{R. H. Coverley - Production Engineer} kindly ear-mark the rocker levers and camshafts which are to be made in nickel steel, and draw Mr.Pendlebury's attention to the parts being special. Mr.Pendlebury will then give them a special treatment. They should be quenched in cold oil to start with. If the scleroscope figure is below 85, we must, by further quenching in either thinner and colder oil, or warm water, get the scleroscope figure up to 85. The Ubas parts must be given special piece numbers to prevent confusion, and Mr.Pendlebury's attention must be particularly drawn to the fact that the parts being sent are Ubas, as they will require different treatment from our standard case hardening material. BY.{R.W. Bailey - Chief Engineer} [Signature] Date DERBY ROLLS-ROYCE LIMITED ENG: 1 2738 | ||