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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).
Detailed engineering drawing of a main intermediate top half bearing.

Identifier  ExFiles\Box 116\1\  scan0089
Date  18th December 1933
  
DRAWING NOT TO BE SCALED.

TOP LEFT AREA:
SHELL A13759P FOR 1ST, 2ND, & 3RD, STDS. L.P.T.B.
=A13773P FOR 4TH, 5TH, & 6TH, STDS. L.P.T.B.
DRILL 13/64" DIA X 5/8" DEEP
1 CHAMFER AT 45° EACH END
REMOVE CORNERS
DIMENSIONS: 105 DIA. +.03/+.05 (PART No A13759 ONLY), 48, 48, 7, 116 CRS, 15.5, 31 ± .25.
MANUFACTURER STAMP: THE ASSOCIATED EQUIPMENT Co. LTD. SOUTHALL, MIDDLESEX
MARGIN STAMP: A-13759

CENTER AREA:
BORE IN POSITION TO B DIA. +.123/+.102 WHEN BOTTOM HALF OF BEARING IS LEAD BRONZE.
BORE IN POSITION TO B DIA. +.08/+.02 WHEN TOP & BOTTOM HALVES OF BEARING ARE WHITEMETAL.
JOINT FACE MUST BE PERFECTLY FLAT & TO SIZE
2" DIA CUTTER, 45°
2 HOLES 3/16" DIA. JIG DRILLED.
17/64" DIA HOLE JIG DRILLED
HOLE 3/16" DIA +.0005 x 5/8" DEEP
SINK CUTTER TO DEPTH OF 2.5
16 HALVES OFF. MATERIAL:- HIDUMINIUM AC.7.
BORE MUST BE CONCENTRIC WITH OUTSIDE OF SHELL
BEARING MUST BE SCRAPED & BEDDED TO CRANKCASE

ALTERATIONS BOX (TOP RIGHT):
ALL GOODS MUST BEAR OUR PART No., OUR DATE LETTER AND MAKER'S TRADE MARK.
ALTERATIONS
OLD PART No U 66941 / VARIOUS ALTERATIONS MADE
1) REF TO 6th STDS ADDED / I-634 / 1-6-34
2) DOWEL HOLES ADDED ON JOINT FACE / I-2994 / 16-7-34
3) DIA 'B' LIMITS FROM +.02 TO +.030 / +.017 TO +.050 / I-3053 / 1-9-34
4) BORE LIMITS FROM +.075 TO +.123 / +.050 TO +.102 / I-3218 / 12-12-34
5) 2 HOLES 1/16 DIA ADDED, ALTERNATIVE LIMITS ON DIA 'B' ADDED / I-4302 / 1-11-36
6) WHITEMETAL FROM A18 / I-4347 / 14-12-36
7) LIMIT ON 105 DIA. FROM +.05 FOR ALL PART Nos EXCEPT A13759 / T.4354 / 18-12-36
ADDITIONAL NOTES IN ALTERATIONS BOX: SHELL PART Nos ADDED L.P.T.B. A.E.C. 19-3-37 / 15-3-37; WHITEMETAL FROM A27 / T-4979 / 8-12-37.

BOTTOM AREA:
TITLE: MAIN BEARING / INTERMEDIATE / TOP HALF
APPROVALS BOX (ST.{Capt. P. R. Strong} 0513):
DRAWN: V.M.K.
TRACED: M.H.
CHECKED: [initials]
PASSED: W.M.
DATE: 18.12.33
FINISH SYMBOLS: ⊕ MACHINED ALL OVER, f MACHINED, G GROUND
FIT SYMBOLS: B FOR HOLES, P PUSH FIT, D DRIVING FIT, F FORCE FIT, X RUNNING FIT
NOTES: NEWALL STANDARD LIMITS ARE USED ONLY WHERE LETTER SYMBOL GIVEN. MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN +.010 / -.010 OF GIVEN SIZE

TABLES:
PART NUMBER TABLE:
STD | DIA | B DIA | F DIA | PART No
1ST | 88 | 85 | 84.4-84.5 | U.98598 / A.13759
2ND | 88 | 84.5 | 83.9-84.0 | U.98598 / A.13759B
3RD | 88 | 84 | 83.4-83.5 | A.13759C
4TH | 86.5 | 83.5 | 82.9-83.0 | A.13773
5TH | 86.5 | 83 | 82.4-82.5 | A.13773B
6TH | 86.5 | 82.5 | 81.9-82.0 | A.13773C

MATERIAL LIST No. R10W:
MATERIAL: 1/2 SHELL
SHELL: 4 3/4" O/D x 4 1/8" I/D LG.
WHITEMETAL: A16 209 CAST IN

MODEL No. BOX:
MODEL No.: OFE, 0761
No. OFF: 4

PART No BOX:
PART No: U.98598 (A.13759 is crossed out)
  
  


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