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).
Letter from Wellworthy Piston Rings Ltd. detailing connecting rod and main bearing clearances.
| Identifier | ExFiles\Box 115\5\ scan0077 | |
| Date | 4th July 1938 guessed | |
| Your Copy 1. by Rolls Royce in this matter - (a) CONNECTING ROD BEARINGS - CLEARANCES. Minimum - 0.001/inch diameter. Maximum - 0.0015/inch diameter. (b) MAIN BEARINGS - where crankcase and crankshaft distortion must be taken into account. Minimum - 0.0012/inch diameter. Maximum - 0.00155/inch diameter. Preferred - 0.00135/inch diameter. We have handed the print over to our Drawing Office, who will go into this very carefully and write you if there is any modification necessary before putting bearings in hand. Assuring you of our best attention and service at all times, We are, dear Sirs, Yours faithfully, For WELLWORTHY PISTON RINGS LTD., Technical Manager. | ||