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Dimension and wear report for a crankshaft, main bearings, and big-end bearings following a test.

Identifier	ExFiles\Box 83\1\ scan0279
Date	18th November 1936

Unit B.22 CRANKSHAFT - EB2637 - TEST NO 4516 - N.160 - V.C.M. MAIN BEARINGS - EB2500-11-17 - RM {William Robotham - Chief Engineer} 67 (REAR BRG) - HALL'S METAL. CONN. ROD BUSHES - EB2810 - HALL'S METAL - SOLID TYPE. CRANKSHAFT AND BEARING DIMENSIONS TABLE 1: CRANKSHAFT JOURNAL, MAIN BEARINGS, AND BEARING CAP & CRANKCASE \| NO. OF BEARING \| CRANKSHAFT JOURNAL - DIAMETER BEFORE TEST \| CRANKSHAFT JOURNAL - DIAMETER AFTER TEST MAXIMUM \| CRANKSHAFT JOURNAL - DIAMETER AFTER TEST MINIMUM \| CRANKSHAFT JOURNAL - OVALITY \| CRANKSHAFT JOURNAL - MAXIMUM WEAR \| MAIN BEARINGS - INSIDE DIAM. BEFORE TEST \| MAIN BEARINGS - INSIDE DIAM. AFTER TEST MAXIMUM AT 'A' \| MAIN BEARINGS - INSIDE DIAM. AFTER TEST MINIMUM AT 'B' \| MAIN BEARINGS - OVALITY "AA {D. Abbot Anderson} " \| MAIN BEARINGS - MAXIMUM WEAR \| SECTIONAL THICKNESS OF BUSHES - MIN 'A' CAP HALF \| SECTIONAL THICKNESS OF BUSHES - MIN 'A' CASE HALF \| SECTIONAL THICKNESS OF BUSHES - MAX 'B' CAP HALF \| SECTIONAL THICKNESS OF BUSHES - MAX 'B' CASE HALF \| SECTIONAL THICKNESS OF BUSHES - VARIATION CAP HALF \| SECTIONAL THICKNESS OF BUSHES - VARIATION CASE HALF \| MAX CLEARANCE BETWEEN BRG. AND JOURNAL - BEFORE \| MAX CLEARANCE BETWEEN BRG. AND JOURNAL - AFTER \| BEARING CAP & CRANKCASE - DIAM OF BRG CAP AND C'CASE MINIMUM AT 'A' \| BEARING CAP & CRANKCASE - DIAM OF BRG CAP AND C'CASE MAXIMUM AT 'B' \| BEARING CAP & CRANKCASE - OVALITY 'BB' \| TOTAL CLEARANCE BETWEEN BRG. HALVES AND LINERS (SKETCH 'C') \| \|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\| \| 1 \| 2.2484 \| 2.2481 \| 2.2460 \| .0021 \| .0024 \| 2.2512 \| 2.2505 \| 2.2500 \| .0005 \| - \| .174 \| .1725 \| .1745 \| .1745 \| .0005 \| .002 \| .0028 \| .0045 \| 2.5977 \| 2.6000 \| .0023 \| O \| \| 2 \| 2.2480 \| 2.247 \| 2.2458 \| .0012 \| .0022 \| 2.2512 \| 2.2521 \| 2.2502 \| .0019 \| .0009 \| .171 \| .171 \| .175 \| .175 \| .004 \| .004 \| .0032 \| .0063 \| 2.5957 \| 2.5996 \| .0039 \| .002 \| \| 3 \| 2.2482 \| 2.2477 \| 2.2454 \| .0023 \| .0028 \| 2.2512 \| 2.2518 \| 2.2494 \| .0024 \| .0006 \| .172 \| .1715 \| .1753 \| .1745 \| .0033 \| .003 \| .0030 \| .0039 \| 2.5955 \| 2.6000 \| .0005 \| .002 \| \| 4 \| 2.2481 \| 2.2482 \| 2.2457 \| .0025 \| .0024 \| 2.2512 \| 2.2540 \| 2.2480 \| .0060 \| .0028 \| .168 \| .171 \| .174 \| .1745 \| .006 \| .0035 \| .0031 \| .0083 \| 2.5952 \| 2.5985 \| .0033 \| O \| \| 5 \| 2.2480 \| 2.2481 \| 2.2457 \| .0024 \| .0023 \| 2.2512 \| 2.2540 \| 2.2516 \| .0024 \| - \| .169 \| .1715 \| .1745 \| .1745 \| .0105 \| .003 \| .0032 \| .0083 \| 2.5920 \| 2.5995 \| .0075 \| .005 \| \| 6 \| 2.2482 \| 2.2477 \| 2.2472 \| .0005 \| .0010 \| 2.2512 \| 2.2518 \| 2.2510 \| .0008 \| - \| .1665 \| .172 \| .175 \| .175 \| .0085 \| .003 \| .0030 \| .0046 \| 2.5915 \| 2.5997 \| .0082 \| .002 \| \| 7 \| 2.2480 \| 2.2459 \| 2.2463 \| .0020 \| .0017 \| 2.2512 \| 2.2553 \| 2.2533 \| .0020 \| .0041 \| .165 \| .1665 \| .1735 \| .1735 \| .0085 \| .007 \| .0032 \| .0090 \| 2.5908 \| 2.5987 \| .0079 \| .011 \| TABLE 2: CRANKPIN & BIG-END BEARINGS \| NO OF BRG \| CRANKPIN - DIAMETER BEFORE TEST \| CRANKPIN - DIAMETER AFTER TEST A' \| CRANKPIN - DIAMETER AFTER TEST B' \| CRANKPIN - DIAMETER AFTER TEST C' \| CRANKPIN - DIAMETER AFTER TEST D' \| CRANKPIN - OVALITY \| CRANKPIN - MAXIMUM WEAR \| BIG-END BEARINGS - DIAMETER BEFORE TEST \| BIG-END BEARINGS - DIAMETER AFTER TEST A" \| BIG-END BEARINGS - DIAMETER AFTER TEST B" \| BIG-END BEARINGS - OVALITY \| BIG-END BEARINGS - MAXIMUM WEAR \| BIG-END BEARINGS - MAXIMUM CLEARANCE BEFORE \| BIG-END BEARINGS - MAXIMUM CLEARANCE AFTER \| BIG-END BEARINGS - CLEAR ON BRG. HALVES CONN. ROD \| BIG-END BEARINGS - CLEAR ON BRG. HALVES CAP. SIDE \| \|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\|---\| \| 1 \| 1.999 \| 1.9989 \| 1.9985 \| 1.9987 \| 1.9987 \| .0002 \| .0005 \| 2.0008 \| 2.0018 \| 2.0013 \| .0005 \| .0010 \| .0018 \| .0033 \| .0005 \| .0025 \| \| 2 \| 1.999 \| 1.9988 \| 1.9988 \| 1.9987 \| 1.9987 \| .00015 \| .0003 \| 2.0008 \| 2.0017 \| 2.0012 \| .0005 \| .0009 \| .0018 \| .0030 \| .0025 \| .0025 \| \| 3 \| 1.999 \| 1.999 \| 1.9987 \| 1.9988 \| 1.9988 \| .0002 \| .0003 \| 2.0008 \| 2.0016 \| 2.0012 \| .0004 \| .0008 \| .0018 \| .0029 \| .0015 \| .0025 \| \| 4 \| 1.999 \| 1.9988 \| 1.9985 \| 1.9986 \| 1.9987 \| .00015 \| .0005 \| 2.0008 \| 2.0016 \| 2.0013 \| .0003 \| .0008 \| .0018 \| .0031 \| .0008 \| .003 \| \| 5 \| 1.999 \| 1.999 \| 1.9987 \| 1.9987 \| 1.9987 \| .00015 \| .0003 \| 2.0008 \| 2.0018 \| 2.0001 \| .0017 \| .0010 \| .0018 \| .0031 \| .003 \| .002 \| \| 6 \| 1.999 \| 1.9989 \| 1.9988 \| 1.9987 \| 1.9987 \| .0002 \| .0003 \| 2.0008 \| 2.0019 \| 2.0013 \| .0006 \| .0011 \| .0018 \| .0032 \| .0035 \| .001 \| Diagram Labels: Main Brg. C'Case and Brg Cap Sketch "C" FIGURES GIVEN INCLUDES A,B,C & D Conn. Rod Brg Crankpin Stamp (bottom right): ROLLS ROYCE LTD DERBY AERO A38572 18 NOV 1936 Handwritten Reference: Ex I 67

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).