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).
Standardisation of parts for a 10/43 axle ratio including a double row pinion nose roller bearing.
| Identifier | ExFiles\Box 171\5\ img028 | |
| Date | 8th March 1938 | |
| COMPLETED 13.5.38. BENTLEY STANDARDISATION OF PARTS Date Issued: 8.3.38. Sheet No.: B.9. Drg. No.: L.O.P.S. Description: 10/43 AXLE RATIO INCLUDING DOUBLE ROW PINION NOSE ROLLER BEARING SHOWN ON PD.41. Purpose: For use with overdrive gearbox to improve performance in direct gear. Brief Report and Remarks: Gears of this ratio ran 28,000 miles on 5.B.IV, 32 hours on 3rd. speed on dyno. and will have completed 10,000 miles on 6.B.IV. Nose bearing failure of a single row roller occured on 6.B.IV. at 5,000 miles. The double row bearing will shortly undergo dyno. test. 10/43 ratio also fitted in 3.B.IV and B.10.DG. When recommended for Introduction: 101 in M.{Mr Moon / Mr Moore} Report References: By: BY.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}: RM.{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design}: DA.{Bernard Day - Chassis Design} Mx{John H Maddocks - Chief Proving Officer}: MX.{John H Maddocks - Chief Proving Officer} Old Parts: Material £2.2.0., Labour £0.16.6, Burden £1.8.11., Total £4. 7.5. New Parts: Material £2.6.8., Labour £0.16.9, Burden £1.9. 4., Total £4.12.9. Increase in Cost: £0. 5. 4. (handwritten: GRH 9/4/38) Cost of Tools: £ 16.0.0d., Production Position and Comments: New design 10/43 axle gears with double row pinion bearing to be introduced at 1st. Bentley in 'M' series increases factory cost of chassis by 5/4d. and involves £16.0.0d tool cost. All details for 10/41 gears of existing type have been released for 'M' series and as a result parts valued £196.0.0d. are machined too far to convert to new design and will therefore be rendered scrap. RHC.{R. H. Coverley - Production Engineer} Authorisation to Proceed. Introduce on the 1st Chassis in M Series. Sg.{Arthur F. Sidgreaves - MD} Signature Date: 10/5/38 Hs.{Lord Ernest Hives - Chair} Signature Date: 10/5/38 | ||