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).
Blueprint detailing the casting and finished dimensions for a Vauxhall valve tappet.
| Identifier | ExFiles\Box 10\3\ 03-page027 | |
| Date | 19th June 1937 guessed | |
| FACE MUST BE GROUND SMOOTH & TRUE WITH AXIS OF BODY WITHIN .001 INDICATOR READING MINIMUM RADIUS OF FLAT FROM C/L OF TAPPET MUST NOT BE LESS THAN 5/32 CASTING DIMENSIONS 2" 11/32 MUST BE SMOOTH AS POSSIBLE 29/32 +0 -1/64 SOLID 1/16 - 1/8 DEEP CHILLED FINISHED DIMENSIONS 11/16 DRILL .020 CFR AT 45° 120° +2° -0° 1/16 MAX FLAT ALLOWABLE 3/16 DRILL .910/.912 DIA 13/16 +0 -.001 90° 1/16 CHILL AFTER MACHINING .010/.005 CFR AT 45° 3/8 DIA FLAT .8740/.8735 GRIND M/C ALL OVER NOTE- SELECT FOR UNIFORM MIN CLEARANCE IN CYL CASE VIEW OF END CONICAL .007/.005 3/8 DIA FLAT 4/1 VAUXHALL VALVE TAPPET | ||