Specifications for crankshaft journal working clearance, Brinell hardness, and shims.
| Identifier | ExFiles\Box 115\3\ scan0116 | |
| Date | 19th November 1937 | |
| -2- Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 3/MH. {M. Huckerby} 19.11.37. (c) Working Clearance. Diametrical clearance between the crankshaft journal and the bore of the bearings to be normal at .003 with a minimum limit of .00275 and maximum limit of .00350. (d) Brinell after final heat treat to be 42 - 50 (e) R.R.56 shims as existing. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||
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).