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 a main bearing front top half.
| Identifier | ExFiles\Box 116\1\ scan0090 | |
| Date | 29th June 1933 | |
| THE ASSOCIATED EQUIPMENT CO. LTD. SOUTHALL, MIDDLESEX. DRAWING NOT TO BE SCALED. BORE IN POSITION TO B DIA +.123/+.102 WHEN BOTTOM HALF OF BEARING IS LEAD BRONZE. BORE IN POSITION TO B DIA +.93/+.88 WHEN TOP & BOTTOM HALVES OF BEARING ARE WHITEMETAL. JOINT FACE MUST BE PERFECTLY FLAT & TO SIZE. BORE MUST BE CONCENTRIC WITH OUTSIDE OF SHELL. CHAMFER AT 45° EACH END. UNDERCUT 1 RAD. TO DEPTH AS SHOWN. CHAMFER AT 45°. BEARINGS MUST BE SCRAPED & BEDDED TO CRANKCASE. 2 HOLES 5/16 DIA JIG DRILLED. 4 HALVES OFF MATERIAL: HIDUMINIUM A.C.7. SHELL A13733A FOR 1st, 3rd, & 5th STDS L.H.T.B. A13767A FOR 4th & 6th STDS R.H.T.B. SINK CUTTER TO DEPTH OF 2.5". A.E.C. PRODUCTION & L.P.T.B. SPARES. MAIN BEARING / FRONT - TOP HALF. TITLE BLOCK: DRAWN: R.A.W. TRACED: M.S.V. CHECK'D: M PASSED: HMA DATE: 29-6-33 FINISHES: ⊕ MACHINED ALL OVER G GROUND LIMITS: NEWALL STANDARD LIMITS ARE USED ONLY WHERE LETTER SYMBOL IS GIVEN. B FOR HOLES P PUSH FIT D DRIVING FIT F FORCE FIT X RUNNING FIT MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN +OR- .012 / - .025 OF GIVEN SIZE. ALTERATIONS: ALL GOODS MUST BEAR OUR PART NO, OUR DATE LETTER AND MAKER'S TRADE MARK. OLD PT No U-65075 1) 05 DIA FR. 110 WAS RECESS. I-2163 18/1/33. 2) MATERIAL FROM R10. STOCK LIST NO FROM 31G-204 I-2231 10-3-33. 3) UNDERCUT CHANGED FROM 108.5 +/- .012 DIA X .5 WIDE I-2324 10-5-33. 4) LIMIT ON 105 DIA FROM +/- .025 TO +/- .012 I-2448 20-11-33. 5) 105 DIA X +/- .012 SHOWN REMOVED FROM SHELL I-2774 6-3-34. 6) DIMENSION FOR GROOVE ADDED ON DRG OF BOTTOM HALF I-2785 7-3-34. 7) 115 DIA TO 112 DIA. 8) 2ND & 8TH STDS ADDED I-634 1-5-34. 9) DIA B LIMITS FROM +1.0/+.90 TO +.098/+.090 I-3050 4-9-34. 10) DIA B LIMITS FROM +.290/+.277 TO +.123/+.102 I-3218 12-11-34. 11) ALTERNATIVE LIMITS ADDED TO B. DIA. I-4302 18-1-36. 12) WHITEMETAL FROM A10 I-4347 4-12-34. 13) LIMIT ON 105 DIA. FROM +.025/+.00 FOR ALL PART Nos EXCEPT A13733 & A13767 I-4354 18-2-36. 14) SHELL PART Nos ADDED L.P.T.B-A.E.C. 15-8-37. 15) WHITEMETAL FROM ... I-4979 9-12-3... PARTS TABLE: OP | A DIA | B DIA | F DIA | PART No. 1ST | --- | 85 | 84.4 | U.98597 2ND | 88 | 86.5 | 84.5 | A137... 3RD | 88 | 84 | 83.5 | A13733 4TH | 86.5 | 83 | 82.4 | A13767 5TH | 86.5 | 83 | 82.4 | A13767 6TH | 86.5 | 82.5 | 81.9 | A137... MODEL: 4CYL, 6CYL (2 HALVES) | ||