Rolls Royce Technical Archive

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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).

Test report detailing main bearing dimensions and clearances before and after wear.

Identifier	ExFiles\Box 91\2\ scan0397
Date	10th May 1937

MAIN BEARINGS DIMENSIONS UNIT NO Ph.III NO 13. PASSED TO TEST :- 7-5-37 COMPLETED TEST :- 10-5-37 CRANKSHAFT: E.88803 MAf: V.C.M. TEST PIECE NO: XV. 6136 MAIN BEARINGS: STD. PRODN. MATL: WM/T. TABLE DATA: \| \| \| BEARINGS \| \| \| C/SHAFT \| \| \| CLEARANCE \| \| \| \| \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| WEAR \| \| 1 \| AA{D. Abbot-Anderson} \| 2.7501 \| 2.7493 \| -.0008 \| 2.7476 \| 2.7475 \| -.0001 \| +.0025 \| +.0025 \| NIL. \| \| \| BB \| " \| 2.7498 \| -.0003 \| " \| 2.7473 \| -.0003 \| " \| +.0018 \| -.0007 \| \| \| OVALITY \| .0005 \| \| \| .0002 \| \| \| \| \| \| \| 2 \| AA{D. Abbot-Anderson} \| " \| 2.7492 \| -.0009 \| 2.7477 \| 2.7475 \| -.0002 \| +.0024 \| +.002 \| -.0004 \| \| \| BB \| " \| 2.7490 \| -.0011 \| " \| 2.7472 \| -.0005 \| " \| +.0015 \| -.0009 \| \| \| OVALITY \| .0002 \| \| \| .0003 \| \| \| \| \| \| \| 3 \| AA{D. Abbot-Anderson} \| " \| 2.7490 \| -.0011 \| 2.7477 \| 2.7475 \| -.0002 \| +.0024 \| +.003 \| +.0006 \| \| \| BB \| " \| 2.7502 \| -.0001 \| " \| 2.7478 \| -.0005 \| " \| +.0013 \| -.0009 \| \| \| OVALITY \| .0012 \| \| \| .0003 \| \| \| \| \| \| \| 4 \| AA{D. Abbot-Anderson} \| " \| 2.7485 \| -.0016 \| 2.7477 \| 2.7475 \| -.0002 \| +.0024 \| +.0026 \| +.0002 \| \| \| BB \| " \| 2.7501 \| NIL \| " \| 2.7475 \| -.0002 \| " \| +.001 \| -.0014 \| \| \| OVALITY \| .0016 \| \| \| NIL. \| \| \| \| \| \| \| 5 \| AA{D. Abbot-Anderson} \| " \| 2.7489 \| -.0012 \| 2.7477 \| 2.7474 \| -.0003 \| +.0024 \| +.0029 \| +.0005 \| \| \| BB \| " \| 2.7500 \| -.0001 \| " \| 2.7471 \| -.0006 \| " \| +.0018 \| -.0009 \| \| \| OVALITY \| .0011 \| \| \| .0003 \| \| \| \| \| \| \| 6 \| AA{D. Abbot-Anderson} \| " \| 2.7496 \| -.0005 \| 2.7476 \| 2.7474 \| -.0002 \| +.0025 \| +.0031 \| +.0006 \| \| \| BB \| " \| 2.750 \| -.0001 \| " \| 2.7469 \| -.0007 \| " \| +.0022 \| -.0003 \| \| \| OVALITY \| .0004 \| \| \| .0005 \| \| \| \| \| \| \| 7 \| AA{D. Abbot-Anderson} \| " \| 2.7496 \| -.0005 \| 2.7477 \| NIL \| +.0024 \| +.002 \| -.0004 \| \| \| BB \| " \| 2.7494 \| -.0007 \| " \| 2.7476 \| -.0001 \| " \| +.0017 \| -.0007 \| \| \| OVALITY \| .0002 \| \| \| .0001 \| \| \| \| \| \| MAX. & MIN CLEARANCES GIVEN. GAUGE SIZE: ExI 215.