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).
Main bearing wear and measurements after a 10,000-mile test in France.
| Identifier | ExFiles\Box 83\2\ scan0045 | |
| Date | 21th May 1937 guessed | |
| UNIT Nọ: B 4 MAIN BEARINGS AFTER 10,000 MILES IN FRANCE CRANKSHAFT: E61223 MATṣ: V.C.M. Nọ: 5456 W.626 (2 HOLES IN JOURNALS) MAIN BEARINGS: IN HOYTS Z3 MATERIAL WITH OIL GROOVES RIGHT ROUND. TABLE DATA: SECTION 1: MAIN BEARINGS | Nọ | DIA. BEFORE TEST | DIA. AFTER TEST AA{D. Abbot-Anderson} | DIA. AFTER TEST BB | OVALITY | MAX. WEAR | |----|------------------|--------------------|--------------------|---------|-----------| | 1 | 2·2511 | 2·2516 | 2·2505 | ·0011 | ·0005 | | 2 | " | 2·2595 | 2·2515 | ·008 | ·0084 | | 3 | " | 2·2560 | 2·2520 | ·004 | ·0049 | | 4 | " | 2·2560 | 2·2520 | ·004 | ·0049 | | 5 | " | 2·2560 | 2·2517 | ·0043 | ·0049 | | 6 | " | 2·2600 | 2·2520 | ·008 | ·0089 | | 7 | " | 2·2516 | 2·2513 | ·0003 | ·0005 | SECTION 2: CRANKSHAFT JOURNALS | Nọ (implied) | DIA. BEFORE TEST | DIA. AFTER TEST A | DIA. AFTER TEST B | OVALITY | MAX. WEAR | |--------------|------------------|-------------------|-------------------|---------|-----------| | 1 | 2·2487 | 2·2480 | 2·2473 | ·0007 | ·0014 | | 2 | 2·2485 | 2·2476 | 2·2470 | ·0006 | ·0015 | | 3 | 2·2485 | 2·2480 | 2·2470 | ·001 | ·0015 | | 4 | 2·2486 | 2·2478 | 2·2472 | ·0006 | ·0014 | | 5 | 2·2487 | 2·2479 | 2·2470 | ·0009 | ·0017 | | 6 | 2·2487 | 2·2480 | 2·2473 | ·0007 | ·0014 | | 7 | 2·2487 | 2·2480 | 2·2476 | ·0004 | ·0011 | SECTION 3: MAX. CLEARANCE BETWEEN BRG. & JOURNAL | Nọ (implied) | BEFORE | AFTER | |--------------|--------|--------| | 1 | ·0024 | ·0043 | | 2 | ·0026 | ·0125 | | 3 | ·0026 | ·009 | | 4 | ·0025 | ·0088 | | 5 | ·0024 | ·009 | | 6 | ·0024 | ·0127 | | 7 | ·0024 | ·004 | BEARINGS, WITH THE EXCEPTION OF Nọs 1 & 7, IN VERY POOR CONDITION (SEE PHOTOGRAPHS WITH REPORT). JOURNALS WORN & GROOVED. GAUGE SIZE: 2·2508 | ||