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).

Dimensional inspection report for main bearings, detailing measurements before and after testing.

Identifier	ExFiles\Box 123\5\ scan0336
Date	15th February 1939

MAIN BEARINGS DIMENSIONS UNIT Nº B60 No.1. PASSED TO TEST :- 17-9-38 COMPLETED TEST :- 15-2-39 RUNNING TIME :- 197 HRS. 20 MINS. MILEAGE :- ( 92 HRS. 45 MINS. F.T.) CRANKSHAFT: EB.3867 MATL: V.C.M. TEST PIECE Nº: XV.7402-B105 MAIN BEARINGS: EB.3919-20-1-2 MATL: S/LC. & WMT. 4089/90. TABLE DATA: BEARINGS \| C/SHAFT \| CLEARANCE ROW \| TYPE \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| DIFF. WEAR 1 \| A-A \| 2.5002 \| 2.5000 \| -.0002 \| 2.4978 \| 2.4970 \| .0008 \| .0024 \| .0030 \| .0006 1 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4978 \| 2.4970 \| .0008 \| .0024 \| .0030 \| .0006 1 \| OVALITY \| NIL. \| NIL. \| \| NIL. \| NIL. \| \| \| \| 2 \| A-A \| 2.5002 \| 2.5015 \| .0013 \| 2.4979 \| 2.4970 \| .0009 \| .0024 \| .0050 \| .0026 2 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4978 \| 2.4965 \| .0013 \| .0023 \| .0030 \| .0007 2 \| OVALITY \| NIL. \| .0015 \| \| .0001 \| .0005 \| \| \| \| 3 \| A-A \| 2.5002 \| 2.5010 \| .0008 \| 2.4979 \| 2.4970 \| .0009 \| .0023 \| .0045 \| .0022 3 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4980 \| 2.4965 \| .0015 \| .0022 \| .0030 \| .0008 3 \| OVALITY \| NIL. \| .0010 \| \| .0001 \| .0005 \| \| \| \| 4 \| A-A \| 2.5002 \| 2.5015 \| .0013 \| 2.4977 \| 2.4965 \| .0012 \| .0027 \| .0050 \| .0023 4 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4975 \| 2.4965 \| .0010 \| .0025 \| .0035 \| .0010 4 \| OVALITY \| NIL. \| .0015 \| \| .0002 \| NIL. \| \| \| \| 5 \| A-A \| 2.5002 \| 2.5015 \| .0013 \| 2.4978 \| 2.4970 \| .0008 \| .0025 \| .0050 \| .0025 5 \| B-B \| 2.5002 \| 2.5005 \| .0003 \| 2.4977 \| 2.4965 \| .0012 \| .0024 \| .0035 \| .0011 5 \| OVALITY \| NIL. \| .0010 \| \| .0001 \| .0005 \| \| \| \| 6 \| A-A \| 2.5002 \| 2.5010 \| .0008 \| 2.4978 \| 2.4964 \| .0014 \| .0029 \| .0046 \| .0017 6 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4973 \| 2.4965 \| .0008 \| .0024 \| .0035 \| .0011 6 \| OVALITY \| NIL. \| .0010 \| \| .0005 \| .0001 \| \| \| \| 7 \| A-A \| 2.5002 \| 2.5000 \| -.0002 \| 2.4978 \| 2.4970 \| .0008 \| .0025 \| .0030 \| .0005 7 \| B-B \| 2.5002 \| 2.5000 \| -.0002 \| 2.4977 \| 2.4970 \| .0007 \| .0024 \| .0030 \| .0006 7 \| OVALITY \| NIL. \| NIL. \| \| .0001 \| NIL. \| \| \| \| MAX. & MIN. CLEARANCES GIVEN. GAUGE SIZE: