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 increased clearance specifications for cranks and bearings.
| Identifier | ExFiles\Box 115\3\ scan0092 | |
| Date | 17th September 1937 guessed | |
| -3- Further the clearance between crank and bearings has been increased on account of the metal 'growing' and picking up. The sizes and changes in clearance are as follows.- CLEARANCE. Bearings. 2.2515+1/4 Min. Max. Crank. 2.2495-1 .002 .00325 Bearings. 2.2515+1/2 Min. Max. Crank. 2.24875-1/2 .00275 .00325 Bearings. 2.25175-1/2 Min. Max. Crank. 2.24875-1/2 .00275 .0035. Thrust Bearing Clearance .001 - .002 original. Thrust Bearing Clearance .003 - .004 present. RHC{R. H. Coverley - Production Engineer}/Cy. | ||