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).
Drawing for a left-hand worm steering gear with a 20:1 ratio.
| Identifier | ExFiles\Box 170\2\ img101 | |
| Date | 8th December 1931 | |
| SAGINAW STEERING GEAR DIVISION GENERAL MOTORS CORPORATION SAGINAW, MICHIGAN, U.S.A. WORM STEERING LH{Mr Haworth}-20:1. PART NO. 261290. MAT. STEEL DRAWN BY F.E.K. TRACED BY DATE DEC. 8, 1931. CHECKED BY G.W.S. 6/11 APPROVED BY SCALE FULL SIZE. READ ALL NOTES BEFORE STARTING WORK. DO NOT SCALE DRAWINGS: WORK TO DIMENSIONS. DRILLED HOLE SIZES GIVE AN ALLOWANCE OF MINUS .001" TO PLUS .004" 'f' - FINISH ALLOWANCE. f - finish, f-ii, f-iii, f-iv, etc. REPORT ERRORS. REVISIONS DATE CH'K.{Mr Kilner} SHARP EDGES AT BOTH ENDS WHERE THREAD RUNS OUT TO BE MILLED SO THAT NO PART WILL BE LESS THAN 1/8 THICK .8107 20° - 20° TOOTH FORM - 4-TIMES SIZE WORM GEAR SHAFT | ||