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 for a main bearing rear top half, showing dimensions and material specifications.
| Identifier | ExFiles\Box 116\1\ scan0091 | |
| Date | 16th December 1933 | |
| MAIN BEARING / REAR / TOP HALF DRAWING NOT TO BE SCALED UNDERCUT 4 WIDE X 1 DEEP SHELL A14734F FOR 1ST, 2ND, & 3RD STDS L.P.T.B. A14738A FOR 4TH, 5TH, & 6TH STDS L.P.T.B. 1 CHAMFER AT 45° EACH END 1 HOLE 1/8 DIA X 5/8 DEEP 105 DIA +.03 / +.08 (PART No A14734 only) 105 DIA S FINISH BORE F DIA S DIA SMOOTH FINISH 1 HOLE 3/16 DIA +- .0005 X 5 DEEP 2 HOLES 17/64 DIA JIG DRILLED BEARING MUST BE SCRAPED & BEDDED TO CRANKCASE BORE IN POSITION TO DIA B +.123/+.102 WHEN BOTTOM HALF OF BEARING IS LEAD BRONZE BORE IN POSITION TO DIA B ±.02 WHEN TOP & BOTTOM HALVES OF BEARING ARE WHITEMETAL JOINT FACE MUST BE PERFECTLY FLAT & TO SIZE 2 HOLES 1/8 DIA JIG DRILLED SINK CUTTER TO DEPTH OF 2.5 4 HALVES OFF MATERIAL:- HIDUMINIUM A.C.7 BORE MUST BE CONCENTRIC WITH OUTSIDE OF SHELL DIMENSIONS: 74 ± .25, 17, 40, 1/16 DIA, 48, 6, 8 TO HOLE, 4, 116 CRS, 31, 45°, 2" DIA CUTTER, 37. TITLE BLOCK: DRAWN: V.M.H. TRACED: M.S. CHECKED: [Symbol] PASSED: AMW DATE: 16.12.33 THE ASSOCIATED EQUIPMENT Co. LTD. SOUTHALL, MIDDLESEX. V.{VIENNA} ST.{Capt. P. R. Strong} 0512 NEWHALL STANDARD LIMITS ARE USED ONLY WHERE LETTER SYMBOL GIVEN B FOR HOLES, D DRIVING FIT, X RUNNING FIT P PUSH FIT, F FORCE FIT MACHINED ALL OVER, MACHINED G GROUND MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN +- 0.8 m/m OF GIVEN SIZE PART NUMBER & MATERIAL TABLE (BOTTOM RIGHT): MATERIAL LIST No. A10W MODEL No. OFF: 0761 PART No: U.99164 MATERIAL: 10 SHELL, 9 WHITE METAL SHELL 4 9/16" % DIA x 3 13/16" I.D. x 3 3/4" Lg (MAKES 2 HALVES) R.R. GENERAL A.I.D. PART NUMBER REVISION TABLE: STD. | S DIA | B DIA | F DIA | PART No 1ST | 88 | 85 | 84.4 | U.99164 -| 87 | 85 | 84.5 | - 2ND | 88 | 84.5 | 83.9 | A14734B 3RD | 88 | 84 | 83.4 | A14734C 4TH | 86.5 | 83.5 | 83.0 | A14738 5TH | 86.5 | 83 | 82.4 | A14738B 6TH | 86.5 | 82.5 | 82.0 | A14738C ALTERATIONS TABLE (TOP RIGHT): ALL GOODS MUST BEAR OUR PART No., OUR DATE LETTER AND MAKER'S TRADE MARK. ALTERATIONS OLD PART No U.68947 & VARIOUS ALTERATIONS MADE 1) 2ND TO 6TH STDS ADDED. T-456 1.6.34 2) 2 DOWEL HOLES ADDED IN JOINT FACE. T-4994 16-7-34 3) DIA 'B' LIMITS FROM +.113 TO +.090. I-3053 4-9-34 4) BORE LIMITS FROM +.090 TO +.123. T-4032 7-11-34 5) 2 HOLES 3/16 DIA ADDED. ALTERNATIVE LIMITS ON DIA B ADDED. T-4302 12-11-36 6) WHITE METAL FROM A19 TO A27. T-4347 14-12-36 7) LIMIT ON 105 DIA. FROM ±.102 FOR ALL PART No. EXCEPT A14734. T-4354 18.12.36 8) HOLE DIA 'F' FROM AND ADDED. T-4456 15-2-37 9) WHITEMETAL FROM A27 TO A2L. L.P.T.B EL. T-4879 9-11-37 10) SHELL PART No ADDED. L.P.T.B EL. 15-3-37 | ||