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 drawing for a piston for an oil pump.
| Identifier | ExFiles\Box 27\1\ Scan053 | |
| Date | 29th January 1929 | |
| TURN .803 DIA SCREW .812 DIA. 16 T.P.I. R.H. TWO SLOTS (FROM 8 HOLES EQUALLY SPACED) DRILL .156 +5 DIA & FILE OUT 2 HOLES DRILL .156 +5 DRILL .1875 +10 DIA REAM .200 DIA AFTER PINNING & SWEATING INTO PISTON ROD DRILL .062 +5 DIA WITH LOCK NUT IN POSITION 2 HOLES DRILL .055 +5 DIA REAM FOR .062 TAPER PINS WITH PISTON ROD IN POSITION SCALE 2/1 PISTON FOR OIL PUMP MATERIAL B 1.325 +10 .475 +10 .100 +10 .250 +10 .125 +10 .050 R +10 .700 DIA .400 DIA +5 .344 DIA +5 .050 CHFR AT 45° +10 .025 R +10 FINE FINISH .600 DIA .800 DIA +4 -2 1.150 DIA +5 | ||