Technical drawing for a friction lining.
| Identifier | ExFiles\Box 141\3\ scan0099 | |
| Date | 14th May 1930 | |
| RR 885 (2)H(20266 3-12-31)B.J.H. No. OPERATION MACHINE TOOL TOOL No. LINING BOUGHT OUT. (NOT GROOVED OR DRILLED) (SIM TO G 77775) 1 GROOVE FITTERS DIE HB {C. E. Harcombe} 5714 2 DRILL IN POSITION 14939 G 15057 G 16360 G THESE GROOVES TO BE PRESSED IN AT RR WORKS IN FORMING THESE GROOVES THE FABRIC MUST BE INDENTED BY A SPECIAL TOOL & NOT CUT TO BE TREATED WITH C.G.G. DRESSING BY MAKERS REPLACE ALL COPIES TO:- EXP. PATT. WORKS FORGE T.O. S.R. D.O. R. {Sir Henry Royce} R.D. AMERICA T.D. COST DRAWN NBS TRACED R.A. CHECKED AWC APPROVED LIMITS O.K. DATE 14.5.30 USED ON No. OFF SECTION 40/50 2 6180 SCALE 1/1 HEAT TREAT BRINELL STANTON TITLE FRICTION LINING MATERIAL COTTON A SPECN Nº MACHINE ALL OVER OR WHERE MARKED THUS *27775 OPERATION G 77775 MACHINE TOOL TOOL No. C 78524 DEPTH OF GROOVE 16 HOLES .0937 DIA EQUALLY SPACED IN TWO'S AS SHEWN, TO BE PIERCED WHEN IN POSITION ON PRESSURE PLATE WITH AN AWL HAVING A NEEDLE POINT. STAPLES TO BE SUNK BELOW THE FACE OF THE FABRIC .035 MIN TO .045 MAX THIS FACE TO BE SQUARE WHEN IN POSITION ON PRESSURE PLATE C 78524 Dimensions and Tolerances: 5.850 DIA .375 CTS {C. Trot Salt - Carburation} +5 -5 45° 5.250 DIA CTS {C. Trot Salt - Carburation} +5 -5 4.525 DIA +0 +.10 .107 +.10 .187 +.10 | ||
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).