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 sinkage and liner alterations for a specific chassis.
| Identifier | ExFiles\Box 146\3\ scan0287 | |
| Date | 29th December 1936 | |
| DATE: 29.12.36 MAIN BEARINGS REPORT UPON SINKAGE OF BEARINGS AND ALTERATION TO LINERS. CHASSIS NO.: 3.8-GA OWNER: F.B.A. LTD JOB NO.: 35968 MILEAGE: 29014. 'A' joint face upper half Camshaft side 'B' " " " " opposite side 'C' Joint face lower half camshaft side 'D' " " " " opposite side MAIN BEARINGS 1 2 3 4 5 6 7 TOTAL Amount of sinkage of upper half { 'A' 'B' } .001" .002" .003" .0025" .0015" .0015" .003" TOTAL Amount of sinkage of lower half{ 'C' 'D' } .001" .0015" .0025" .0015" .001" .001" .0015" TYPE OF LINER { STEEL WITH HALL'S METAL FACINGS. ORIGINAL Thickness of LINER { ALL LINERS WERE .100" THICK Fitted RR. 56 Liners } YES. Amount of 'step' left on upper face of liner { .001" .002" .003" .0025" .0015" .0015" .003" Thickness of NEW liner RR56 not including STEP { .099" .098" .097" .0975" .0985" .0985" .097" TOTAL Amount of Machined off lower cap faces { 'E' 'F' } .001" .0015" .0025" .0015" .001" .001" .0015" 'E' = joint face of cap camshaft side. 'F' = " " " " opposite side. RESULTANT CLEARANCE BETWEEN CRANK JOURNAL & BEARING 1, 2, 3, 4, 5 & 6 FROM .00275" TO .003" + ON N.7 BERING - .003" TO .00325". JA | ||