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).
Technical drawing of an exhaust valve seat.
| Identifier | ExFiles\Box 158\4\ scan0291 | |
| Date | 25th July 1935 | |
| THE ARTICLE SHOWN HEREUNDER IS THE SUBJECT OF CONTRACT: SUPPLIERS SHOULD THEREFORE REFER ALL ENQUIRIES FOR SAME FROM OTHER SOURCES TO A.E.C. SOUTHALL. DRAWING NOT TO BE SCALED. MACHINE OVERSIZE 1 M/M.{Mr Moon / Mr Moore} ON FACES & 2 M/M.{Mr Moon / Mr Moore} ON DIAMETERS. MACHINE TO FINISHED SIZES AFTER APPLYING STELLITE. THE ROUGH TURNED STELLITED SEAT TO BE NORMALISED AFTER STELLITING. PART Nº TO BE ENGRAVED HERE. ALL GOODS MUST BEAR OUR PART No., OUR DATE LETTER AND MAKER'S TRADE MARK. ALTERATIONS OLD PART Nº U57971 & VARIOUS ALTERATIONS MADE I-2575 ① I-2681 8.1.34 ② I-3460 9.5.35 RETRACED SAME Nº NO ALTERATION MADE PART Nº 85041 ADDED SPARES TO C.E. 7-12-37 THE ASSOCIATED EQUIPMENT Co. LTD. SOUTHALL. MIDDLESEX. ST.{Capt. P. R. Strong} 0512 A.L. PART Nº A85026 ETC. DRAWN TRACED H Scott CHECK'D PASSED Lums DATE 25.7.35 ⊕ MACHINED ALL OVER f MACHINED G GROUND NEWHALL STANDARD LIMITS ARE USED ONLY WHERE LETTER SYMBOL GIVEN B FOR HOLES P PUSH FIT F FORCE FIT D DRIVING FIT X RUNNING FIT Y MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN ±0.2m/m OR 0.008" OF GIVEN SIZE MADE FROM: 2 1/4" DIA. BAR X 3/4" LONG MATERIAL LIST No. 9 MODEL: 640 ETC, 661 ETC No. OFF: 2, 4, 6 DIM 'C' PART Nº 52 DIA +.20 +.25 A 85041 52 DIA +.10 +.05 A 85026 EXHAUST VALVE SEAT STELLITE FACING WELDED ON SECTION A.A. ENLARGED VIEWS SCREW 'C' DIA. x 16 T.P.I. WHIT. FORM SEAT TO BE LOCATED ON STELLITE FACING WHEN CUTTING THREAD 47 DIA. ±.05 44 DIA. ±.05 40 DIA. -.2 -.3 45° 12' 2.5 +.5 0 6R. 2 5 0.5R. 1R. 36.4 DIA. +0 -.1 49 DIA. -.1 -.2 WHEN CUTTING THREAD TURN 1 CHAMFER AT 45° 12 SERRATIONS EQUALLY SPACED SHARP CORNERS 39 DIA -.25 -.35 15° 15' | ||