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).
Engineering drawing of a Trunnion Screw for a 40/50 model.
| Identifier | ExFiles\Box 81\2\ scan0106 | |
| Date | 23th November 1923 | |
| DRAWING No A-5056 SEE ALSO THE FOLLOWING OPERATION DRAWINGS 4256 A TURN .616-4 SCREW .625 DIA. 16 T.P.I." R.H. TO FIT GAUGE DRILL .250 DIA. +10 .050 -10 CHAMFER AT 45° ±2° .125 ±15 DRILL .325 +10 .625 DEEP TAP 1/8 BRIGGS STD. .545 -10 .750 ±10 .4985 60° HH .025 +10 .330 +15 .500 +10 1.330 ±15 .225 ±15 .050 CHAMFER AT 45° -10 ±2° DRILL .109 DIA. +5 HARDEN WHERE MARKED H-H DEPTH OF CASE HARDENING .025-.035 OCT 26 1927 DRAWN BY: HWT TRACED BY: HWT CHECKED BY: AWS APPROVED BY: LIMITS: ROLLS-ROYCE OF AMERICA, INC MODEL: 40/50 SEC: 7/10 WEIGHT: DATE: 11-23-23 SCALE: 1/1 HEAT TREAT: STANTON SCHLEROSCOPE: 75-85 TITLE: TRUNNION SCREW MACHINE ALL OVER MACHINE WHERE MARKED MATERIAL: S/ZN SPECIFICATION: 207 NO. OFF: 1 | ||