Rolls-Royce Archives
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).
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Letter from Tecalemit regarding a special transmission lubricant for hypoid gears.13th May 1930Box 136 \ 5  scan0256
Micro-examination report on a failed Hypoid Gear after a dynamometer test.4th Jun 1930Box 136 \ 5  scan0257
List of lubricants that successfully passed a mechanical running test for a hypoid geared axle.18th Mar 1930Box 136 \ 5  scan0258
Page 2 of a document detailing generator load and cooling test conditions.26th Jun 1930Box 136 \ 5  scan0259
Micro-examination report comparing a failed hypoid gear wheel with two American-manufactured wheels, including hardness tests and material analysis.26th Jun 1930Box 136 \ 5  scan0260
Sending a special oil from Prices to replace Whitmores compound for testing.10th Sep 1930Box 136 \ 5  scan0261
Submission of a five-gallon drum of special axle oil for testing against a competitor's product.3rd Nov 1930Box 136 \ 5  scan0262
Tests on different hypoid rear axle oils, including one from Messrs. Prices' and a new one called Oline.3rd Nov 1930Box 136 \ 5  scan0263
Rear axle lubricant named 'Oline' and the reputation of its supplier.5th Nov 1930Box 136 \ 5  scan0264
Replacement of a non-standard hypoid gear rear axle on re-conditioned chassis 14-G-IV.7th Nov 1930Box 136 \ 5  scan0265
Letter from Oiline Refining Company regarding samples of special gear lubricants for testing.10th Nov 1930Box 136 \ 5  scan0266
Current lack of use for a hypoid axle and suggesting its modernization for future use.14th Nov 1930Box 136 \ 5  scan0267
Issues with hypoid gears, including correspondence with Gleason Works and details of a double heat treatment process.18th Nov 1930Box 136 \ 5  scan0268
Letter from Gleason Works responding to scoring troubles with hypoid gears.27th Oct 1930Box 136 \ 5  scan0269
Request for an analysis of Wakefield's Gearease No.1 oil, to be compared with Whitmore's No.0 Hypoid Oil.18th Dec 1930Box 136 \ 5  scan0270
Analysis of a sample of Oiline F.J.W. No6 special gear lubricant for hypoid axles.27th Jan 1931Box 136 \ 5  scan0271
Secret memo discussing the design and modification of a hypoid rear axle.7th Feb 1931Box 136 \ 5  scan0272
Testing and proposed use of Wakefield's Hypoid Axle Compound as an alternative oil for Phantom II rear axles.10th Mar 1931Box 136 \ 5  scan0273
Hypoid axle lubrication, detailing issues with Amber Gear Oil and expressing reluctance to change from Whitmore's Compound 'O'.12th Mar 1931Box 136 \ 5  scan0274
Suitability and approval process for hypoid axle lubricants.13th Mar 1931Box 136 \ 5  scan0275
Specifying the use of Wakefield's oil as an alternative for Hypoid Rear Axles from chassis B-85-M onwards.13th Mar 1931Box 136 \ 5  scan0276
Costs and testing of different lubricants for hypoid axles.23th Mar 1931Box 136 \ 5  scan0277
The investigation and modification of a noisy 20/25HP Hypoid Axle.14th May 1931Box 136 \ 5  scan0278
Inquiry about the probability of standardizing the hypoid type axle for the 25 HP Chassis.9th Jun 1931Box 136 \ 5  scan0279
The standardisation of the hypoid axle for the 25 HP model.16th Jun 1931Box 136 \ 5  scan0280
Correspondence with Price's Oil Company regarding lubricant options for the Phantom II hypoid axle.30th Jun 1931Box 136 \ 5  scan0281
Suitability and approval status of various oils for hypoid rear axle lubrication.1st Jul 1931Box 136 \ 5  scan0282
Successful testing of an alternative oil for hypoid rear axles.1st Sep 1931Box 136 \ 5  scan0283
Comparing the price of C.C. Wakefield's 'Gearease' against the currently used 'Whitmore Compound' lubricant.28th Oct 1931Box 136 \ 5  scan0284
Order for a 5-gallon drum of Wakefields Gearease No.1 for hypoid gear rear axles.30th Oct 1931Box 136 \ 5  scan0285
Cost and testing of hypoid axle oils from suppliers Whitmores', Wakefields', and Prices'.30th Oct 1931Box 136 \ 5  scan0286
Standardisation of chassis parts concerning an alternative lubricant for hypoid gear rear axles.21th Sep 1931Box 136 \ 5  scan0287
From ROY to Hs. updating on the work progress and despatch schedule for Gleason 'Peregrine' Hypoids.26th Aug 1932Box 136 \ 5  scan0288
Cover note for a list of approved lubricants for Hypoid Gears submitted by the Gleason Co.4th Oct 1932Box 136 \ 5  scan0289
Letter from the Shell Group requesting information on the lubrication of Hypoid gears.19th Apr 1933Box 136 \ 5  scan0290
Page 2 of a letter from H. Mitchell to E.V. Hives requesting a meeting.19th Apr 1933Box 136 \ 5  scan0291
Letter arranging a meeting to discuss the lubrication of hypoid gears.5th May 1933Box 136 \ 5  scan0292
Delays in coordinating gear grinding with an external company and proposing a solution.14th Dec 1923Box 136 \ 5  scan0293
Special material claimed to be useful for providing noiseless gears.1st May 1924Box 136 \ 5  scan0294
Material 'Celeran' for gears, concluding it offers no advantage over Phosphor Bronze.12th May 1924Box 136 \ 5  scan0295
First-speed gear trouble in 4-speed gearboxes of Lanchester, Daimler, and Riley cars.20th Mar 1925Box 136 \ 5  scan0296
Comparative analysis of Daimler and Lanchester gearbox designs with annotated diagrams.30th Mar 1925Box 136 \ 5  scan0297
Gear and gearbox design, covering issues with unmeshing and comparing various construction methods.20th Mar 1925Box 136 \ 5  scan0298
Comparison of ground and cut gears, and an investigation into fitting plain bearings to gearboxes instead of ball or roller types.20th Mar 1925Box 136 \ 5  scan0299
Letter from E. Reinbold to E. W. Hives regarding a new patented 'Andrade differential'.4th Mar 1926Box 136 \ 5  scan0300
Information on S.A.E. special steel 3440 used in Hudson and Essex gearboxes.26th Feb 1934Box 136 \ 5  scan0301
Product for testing, referencing an attached letter and booklet on 'Keenolisation'.30th May 1934Box 136 \ 5  scan0302
Investigating a complaint about the quality of 3rd speed helical gears supplied by The Gear Grinding Co. Ltd.1st Feb 1937Box 136 \ 5  scan0303
Preliminary report on improving the quietness of 25/30 HP engine timing gears and Phantom gearbox gears.3rd Apr 1937Box 136 \ 5  scan0304
List of improvements and standards for gear manufacturing, grinding, and testing.3rd Apr 1937Box 136 \ 5  scan0305
Report page discussing the accuracy of broaches and their responsibility for noise.3rd Apr 1937Box 136 \ 5  scan0306
Improving the quality and reducing the cost of chassis gear production.25th Jun 1937Box 136 \ 5  scan0307
Technical memorandum on achieving silent gearing in timing and gearbox systems.31th Aug 1937Box 136 \ 5  scan0308
Gear generating purposes, specifications, and methods for achieving gear quietness.31th Aug 1937Box 136 \ 5  scan0309
Gear eccentricity, tip clearance, and helix accuracy for silent gearing in the Phantom III.31th Aug 1937Box 136 \ 5  scan0310
Blueprints for the Phantom III Idler Gear and a request for production.3rd Sep 1937Box 136 \ 5  scan0311
Blueprints for Phantom III Idler Gear components and a request to produce six sets.3rd Sep 1937Box 136 \ 5  scan0312
Necessary primary effects and permissible errors for producing silent gearing.3rd Sep 1937Box 136 \ 5  scan0313
Gear tooth design, profile errors, and pressure angles, referencing the Phantom III constant mesh pinion.9th Sep 1937Box 136 \ 5  scan0314
Opinion regarding the modification of tooth form for involute transmission gears.3rd Sep 1937Box 136 \ 5  scan0315
Responding to a controversy and clarifying previous points on the subject of silent gears.22th Sep 1937Box 136 \ 5  scan0316
Reprinted article on the subject of automobile worm gearing.1st Sep 1937Box 136 \ 5  scan0317
Comprehensive survey on worm gearing for modern automobile drives.1st Sep 1937Box 136 \ 5  scan0318
Analysis of worm gear design, contact mechanics, load capacity, and comparison with bevel gears.1st Sep 1937Box 136 \ 5  scan0319
Detailed analysis of worm gearing, covering efficiency, design considerations, materials, and manufacturing processes.1st Sep 1937Box 136 \ 5  scan0320
Technical explanation of the design, forces, contact, lubrication, wear, and pitting in worm gear assemblies.1st Sep 1937Box 136 \ 5  scan0321
Page discussing the principles, mounting, and standardization of worm gearing.14th Oct 1937Box 136 \ 5  scan0322
Letter from gear-maker David Brown to Bentley Motors regarding a leaflet on 'Automobile Worm Gearing' and an invitation to meet at the Motor Exhibitions.14th Oct 1937Box 136 \ 5  scan0323
The testing and noise comparison of unground first-speed gears for Bentley models.14th Dec 1937Box 136 \ 5  scan0324
Modification to the Wraith gear lever knob to eliminate rattles.10th Mar 1938Box 136 \ 5  scan0325
Bentley engine gears, comparing unhardened gears against 45° helix angle gears.1st Apr 1938Box 136 \ 5  scan0326
Modification notice for the B.111 and B.50 change gear mechanism as an economy measure.26th Apr 1938Box 136 \ 5  scan0327
Suggestion to improve the Bentley 50 and 111 gear change lever by adding a hard rubber bush.10th Jun 1938Box 136 \ 5  scan0328
Proposal to modify the change speed gear on the Wraith III to address a knocking complaint.11th Jun 1938Box 136 \ 5  scan0329
Findings on change speed mechanisms, including issues with gates, stops, and engine oscillation.30th Jun 1938Box 136 \ 5  scan0330
Letter regarding the return of two pairs of loaned axle gears.12th Oct 1938Box 136 \ 5  scan0331
Arranging the return of two sets of loaned axle gears.13th Oct 1938Box 136 \ 5  scan0332
The return of borrowed parts from Lendrum & Hartman.17th Oct 1938Box 136 \ 5  scan0333
Comparative tests on Phantom III idler gears to determine torque and ageing effects.10th Jun 1939Box 136 \ 5  scan0334
Paper on ground form finishing hobs and gear manufacturing presented at a Society of Automotive Engineers meeting.15th Jan 1940Box 136 \ 5  scan0335
Page discussing the manufacturing of accurate and quiet gears, focusing on hobbing techniques and hob tolerances.15th Jan 1940Box 136 \ 5  scan0336
Page discussing the design, calculation, and testing of hobs for generating gear teeth.15th Jan 1940Box 136 \ 5  scan0337
The operation and use of hob lead checkers and contour testing fixtures for gear manufacturing.15th Jan 1940Box 136 \ 5  scan0338
Guide on the correct procedure and importance of sharpening hobs, page 5.15th Jan 1940Box 136 \ 5  scan0339
Hob centering gages and the causes and remedies for visible flats on gear teeth.15th Jan 1940Box 136 \ 5  scan0340
The process and importance of hob setting for precision gears.15th Jan 1940Box 136 \ 5  scan0341
Page detailing gear hobbing techniques, machine condition, and hob positioning.15th Jan 1940Box 136 \ 5  scan0342
Page describing the nomenclature of hob terms, noting that certain photographs are excluded from mimeographed copies.15th Jan 1940Box 136 \ 5  scan0343
Diagrams and tables detailing involute gear design, hobbing, and manufacturing limits.15th Jan 1940Box 136 \ 5  scan0344
Calculations and diagrams for gear hobbing, including setup, modification, and teeth contact.15th Jan 1940Box 136 \ 5  scan0345
Inspection charts for a gear hob, showing lead and modified tooth form.15th Jan 1940Box 136 \ 5  scan0346
Formula sheet for setting a hob pressure angle checking fixture, with examples for straight and spiral gash hobs.15th Jan 1940Box 136 \ 5  scan0347
Diagrams illustrating gear hobbing, showing cutting zones, lines of action, and hob teeth.15th Jan 1940Box 136 \ 5  scan0348
Guide for estimating the time required for hobbing gears, with formulas and a cutting speeds table.15th Jan 1940Box 136 \ 5  scan0349
Chart and diagrams detailing the recommended length and features of worm gear hobs.5th Apr 1940Box 136 \ 5  scan0350
Use of high helix angle gears for reducing noise in gearboxes.5th Apr 1940Box 136 \ 5  scan0351
New aluminium timing gears based on the Lincoln Zephyr camshaft wheel design.10th Aug 1940Box 136 \ 5  scan0352
Requesting a review of documents PL.280 and PL.373 concerning the second-speed synchromesh.21th Oct 1940Box 136 \ 5  scan0353
Cover letter from Rm. to Lov. regarding an order for gears and an attached reply from Olley in America.5th Jun 1941Box 136 \ 5  scan0354
Requesting assistance in obtaining sample gears that have arrived at Prestwick Aerodrome.23th Jul 1941Box 136 \ 5  scan0355


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