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 specifications for a Vauxhall Valve Tappet.
| Identifier | ExFiles\Box 10\3\ 03-page031 | |
| Date | 19th July 1937 guessed | |
| VAUXHALL VALVE TAPPET, M/C ALL OVER, 1/16 MIN DEPTH OF CHILL, AFTER MACHINING, BREAK CORNERS .010/.005, 3/16 DRILL, .3835 GRIND / .389, 1/16, 1/4, 13/32 +1/64 -1/64, .005/.003, 3/32 R, 60° +1° -0°, 120° +2° -1°, 90° +1° -0°, 2 5/16 +0 -1/64, .61 DIA, .72 DIA, .885 DIA / .880 DRILL, .020 CHMFR AT 45°, 7/8 DIA FLAT, .780, FACE MUST BE GROUND SMOOTH, & TRUE WITH AXIS OF BODY, WITHIN .0015 INDICATOR READING, ON THIS DIA, SELECT FOR UNIFORM MIN, CLEARANCE IN CYLINDER CASE | ||