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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DescriptionDateIdentifier
Letter comparing the performance of Shell and BP petrol, recommending a switch to BP due to better performance in a 20 HP chassis.7th Sep 1929Box 20 \ 6  Scan100
To Mr Royce discussing potential causes of failures in ball bearings.1st Jun 1911Box 20 \ 7  Scan001
Improving ball bearing cage design to prevent wear and issues under no-load conditions.1st Jun 1911Box 20 \ 7  Scan002
Improving ball bearing reliability by fitting rigid cages to prevent foreign matter contamination.27th Jun 1911Box 20 \ 7  Scan003
To Mr Johnson discussing the replacement of D.W.M. ball bearings following an enquiry about improvements.27th Jun 1911Box 20 \ 7  Scan004
The urgent replacement of faulty ball bearings with sheet metal cages with new cast cage bearings.23th Aug 1911Box 20 \ 7  Scan005
Technical paper on the design, load distribution, and stress analysis of ball and roller bearings.23th Aug 1911Box 20 \ 7  Scan006
Technical document detailing the formulas and principles for ball bearing design.23th Aug 1911Box 20 \ 7  Scan007
Meeting minutes from late 1911 discussing issues with broken, faulty, and replaced ball-bearings.23th Oct 1911Box 20 \ 7  Scan008
Meeting minutes from late 1911 discussing the replacement of faulty ball bearings from various suppliers.13th Dec 1911Box 20 \ 7  Scan009
Committee discusses a failed front wheel bearing, its cause, and the cost of replacement for a customer.27th Oct 1911Box 20 \ 7  Scan010
Instructions regarding the replacement of pressed cage bearings with cast bronze cage bearings for Chassis 1498.27th Oct 1911Box 20 \ 7  Scan011
Departmental memo requesting an examination of a customer's front road wheel ball bearing for a guarantee claim.3rd Apr 1912Box 20 \ 7  Scan012
Broken front wheel ball bearing from car 1545, seeking an opinion on the cause and liability for replacement.4th Apr 1912Box 20 \ 7  Scan013
The causes of failure in ball bearings.9th Jun 1912Box 20 \ 7  Scan014
Technical discussion on the causes of failure in ball bearings used in motor car wheels.6th Apr 1912Box 20 \ 7  Scan015
Page from 'The Autocar' magazine discussing the performance and design of different types of ball bearings.6th Apr 1912Box 20 \ 7  Scan016
Page from 'THE AUTOCAR' magazine discussing vehicle bearings, hubs, and commercial vehicle use.6th Apr 1912Box 20 \ 7  Scan017
Notes on the crushing strength of ball bearings and the influence of rotational speed on carrying capacity.1st May 1910Box 20 \ 7  Scan018
Instructing the Drawing Office to alter drawings for the end play in gearbox ball bearings as approved by Mr Royce.17th Sep 1912Box 20 \ 7  Scan019
The endways clearance for ball bearings in a gearbox.19th Sep 1912Box 20 \ 7  Scan020
Special parts, specifically the gearbox with Hoffmann Ball Bearings, fitted to chassis 21COE.4th Dec 1912Box 20 \ 7  Scan021
Destructive testing of Hoffmann ball bearings as requested by Mr Royce.26th Jun 1914Box 20 \ 7  Scan022
End thrust tests of ball bearings from three different makes.26th Jun 1914Box 20 \ 7  Scan023
Test report on a bearing, detailing the condition of the balls and race after a run.26th Jun 1914Box 20 \ 7  Scan024
Hand-drawn diagram of a test rig for measuring spring characteristics.26th Jun 1914Box 20 \ 7  Scan025
End thrust tests of ball bearings.20th Jul 1914Box 20 \ 7  Scan026
The performance and failure analysis of different ball bearings after a series of tests.24th Jul 1914Box 20 \ 7  Scan027
The results of an end thrust test for different types of ball bearings.24th Jul 1914Box 20 \ 7  Scan028
Letter from Hoffman Manufacturing about their refusal to provide information on special aero ball bearings.24th Apr 1910Box 20 \ 7  Scan029
Quality, sourcing, and potential in-house manufacturing of ball bearings for gearboxes.15th May 1915Box 20 \ 7  Scan030
The requirement for one or two more race grinders for the plant.29th Aug 1938Box 20 \ 7  Scan031
The correct type of Hoffmann front wheel ball bearings to be used, either with or without entrance grooves.16th Oct 1919Box 20 \ 7  Scan032
Re-use of 'no-entering slot' type bearings for the front wheel and hub.18th Oct 1919Box 20 \ 7  Scan033
Continued memorandum discussing a ruling on the use of an entering slot type of bearing in cars.18th Oct 1919Box 20 \ 7  Scan034
Reuse of 'No-entering Slot' type bearings for the chassis front wheel and hub.20th Oct 1919Box 20 \ 7  Scan035
Letter from British Timken Limited to W. Hives Esq. of Rolls-Royce's Experimental Department regarding the application of Timken Roller Bearings to front wheels.1st Feb 1921Box 20 \ 7  Scan036
Cover of a primer booklet for Timken bearings.10th Feb 1921Box 20 \ 7  Scan037
Letter to British Timken Limited regarding the arrangement of front hubs and the use of their bearings.10th Feb 1921Box 20 \ 7  Scan038
Use of a Chain Roller Bearing Co. bearing for the back axle pinion of a Goshawk I or II.21th Feb 1921Box 20 \ 7  Scan039
Use of Hyatt roller bearings versus plain bearings in gearboxes.4th Oct 1921Box 20 \ 7  Scan040
Dynamometer testing of rear foot and hand brakes, noting failures and suggesting design changes.8th Oct 1921Box 20 \ 7  Scan041
Testing a noisy Hyatt Roller Bearing and the policy for modifying parts based on successful practices.1st Oct 1921Box 20 \ 7  Scan042
Suitability of Michell Thrust Bearings for high-speed applications on a chassis.27th Oct 1921Box 20 \ 7  Scan043
Switch from inch to metric-sized ball bearings for American production.23th Nov 1921Box 20 \ 7  Scan044
The difficulty of avoiding inch dimensions in designs despite a move towards metric standards.23th Nov 1921Box 20 \ 7  Scan045
Letter from the American Bronze Corporation to the Society of Automotive Engineers regarding enclosed data sheets on plain bearings.17th Apr 1922Box 20 \ 7  Scan046
Letter from The New Departure Manufacturing Co. announcing the establishment of a direct branch in London.22th Nov 1922Box 20 \ 7  Scan047
Trial of a new, cheaper, and better Ball Bearing Grease from a different supplier.21th Aug 1923Box 20 \ 7  Scan048
Breakup of a ball bearing supplier monopoly and the subsequent sourcing and pricing strategy.26th Aug 1924Box 20 \ 7  Scan049
The performance of special deep groove ball bearings, No. 4747, in the 20 HP clutch withdrawal mechanism.27th May 1925Box 20 \ 7  Scan050
Letter from The Hoffman Manufacturing Co. regarding a new design of Ball Journal Cage using milled slots instead of countersunk rivets.17th Apr 1925Box 20 \ 7  Scan051
Arranging for the testing of Hoffman Ball Bearings on an experimental car.2nd Jul 1925Box 20 \ 7  Scan052
The decision to use high melting-point grease instead of oil for hub lubrication after a conversation with the Hoffmann people.17th Mar 1927Box 20 \ 7  Scan053
Report concerning the failure of a Bevel Thrust Bearing on chassis 10.G.III after 10,000 miles.16th Jun 1927Box 20 \ 7  Scan054
Proposed modification to the rear axle centre casing, specifically regarding bearings and lightening the differential cage.12th Oct 1927Box 20 \ 7  Scan055
Letter to Mr. F.H. Royce regarding stainless steel ball bearings designed for running under water.22th Oct 1927Box 20 \ 7  Scan056
Trial of a hypoid axle with a 1' offset and the necessary adaptations for a New Departure bearing.14th Jan 1928Box 20 \ 7  Scan057
Choice between Schatz and New Departure bearings with six suggestions for design modification.14th Feb 1928Box 20 \ 7  Scan058
Technical note on bearings, oil retention, water exclusion, and a suggestive sketch.21th Aug 1928Box 20 \ 7  Scan059
Suggesting the substitution of Belmoline C grease for Duckham's H.B.B. grease for packing ball bearings.21th Aug 1928Box 20 \ 7  Scan060
Copy of a letter from Hoffmann Manufacturing Co. Ltd regarding approved bearing lubricants.30th Oct 1928Box 20 \ 7  Scan061
The trial of Schubert type angular thrust bearings for India 4 gears.30th Oct 1928Box 20 \ 7  Scan062
Letter from The United States Graphite Co. introducing their self-lubricating bearing 'Gramix'.15th Dec 1928Box 20 \ 7  Scan063
Promotional tag for GRAMIX self-lubricating bearings.15th Feb 1929Box 20 \ 7  Scan064
Modifications to an 'SS' clutch design, referencing bearings from Hoffman and Skefco.15th Feb 1929Box 20 \ 7  Scan065
Letter regarding an application from Skefko Company to submit their self-aligning ball-bearings for consideration.1st Apr 1912Box 20 \ 7  Scan066
Departmental memo requesting the testing of Skiffco ball bearings.4th Apr 1912Box 20 \ 7  Scan067
Requesting an experiment to compare 'Skefko' and 'Hoffmann' ball bearings.2nd Sep 1913Box 20 \ 7  Scan068
Requesting experiments with Skefko ball bearings due to issues with Hoffmann bearings.2nd Sep 1913Box 20 \ 7  Scan069
Fitting of Skefko ball bearings to the gearbox and rear axle, referencing two production cards and an instruction sheet.9th Oct 1913Box 20 \ 7  Scan070
Agreeing to fit Skefko ball bearings to production gear and axle boxes for observation.16th Oct 1913Box 20 \ 7  Scan071
Skefko ball bearings for gearboxes and rear axles.30th Oct 1913Box 20 \ 7  Scan072
Proposal to return and test Skeffko ball bearings to ascertain the percentage of defects.5th Nov 1913Box 20 \ 7  Scan073
Internal memorandum requesting test results for Skefko ball bearings used in the gearbox and hubs.12th Nov 1913Box 20 \ 7  Scan074
Extract concerning a 1926 gearbox fitted with Skefko ball bearings.14th Nov 1913Box 20 \ 7  Scan075
The failure of Skefko ball bearings during a silence test and requesting a report on the return percentage.14th Nov 1913Box 20 \ 7  Scan076
In reply to a query about Skefko Ball Bearings, detailing a report on their silence test performance.18th Nov 1913Box 20 \ 7  Scan077
Referencing an extract about fitting Skefko Bearings.7th Apr 1914Box 20 \ 7  Scan078
List of experimental parts and modifications fitted to Chassis 58 N A.7th Apr 1914Box 20 \ 7  Scan079
Instruction sheet requesting an urgent order for various Skaffko ball bearings for a self-starter motor.6th Jun 1914Box 20 \ 7  Scan080
The experimental fitting of Skefko Ball Bearings to various car components.18th Jun 1914Box 20 \ 7  Scan081
And response regarding tests on Skefko ball bearings.29th Jun 1914Box 20 \ 7  Scan082
End thrust tests of a Skefko ball bearing compared to Hoffman and D.W.F. bearings.12th May 1914Box 20 \ 7  Scan083
On the unsuitability of Skefko ball bearings for end pressure applications like road wheels, noting they are noisier than Hoffmann or D.W.F. types.10th Jul 1914Box 20 \ 7  Scan084
Instructions to Mr. Mercer regarding Alteration No. 6395, specifying the substitution of ball bearings.13th Jul 1914Box 20 \ 7  Scan085
Confirming the removal of Skefko ball bearings from a front axle and steering gear box.16th Jul 1914Box 20 \ 7  Scan086
Extract from a report on the end thrust tests of ball bearings.24th Jul 1914Box 20 \ 7  Scan087
Summarising the results of an end thrust test on different brands of ball bearings.24th Jul 1914Box 20 \ 7  Scan088
Design proposals and bearing modifications for the 'SS' clutch.15th Feb 1929Box 20 \ 7  Scan089
The unsuitability of ordinary ball thrust bearings for the Goshawk 11 engine at high speeds.26th Oct 1921Box 20 \ 7  Scan090
Request for the results of experiments on different pinion thrust bearings for the Goshawk back axle.21th Jul 1922Box 20 \ 7  Scan091
List of parts sent from the United States for experimental work.30th Jan 1920Box 20 \ 7  Scan092
List of parts received from Mr. Olley for inspection and testing.4th Mar 1920Box 20 \ 7  Scan093
Request for a report on Ball Bearings, attaching a copy of a letter from America.11th Aug 1920Box 20 \ 7  Scan094
Letter from Rolls-Royce of America to Claude Johnson requesting test results for Fafnir ball bearings.29th Jul 1920Box 20 \ 7  Scan095
Rejecting Fafnir ball bearings due to non-compliance with specifications and excessive noise.13th Aug 1920Box 20 \ 7  Scan096
Continuation of a discussion regarding sourcing American equivalent Hoffman bearings and clarifying the total number of bearings in a set.13th Aug 1920Box 20 \ 7  Scan097
Unsatisfactory Hess-Bright bearings on gears received from America.23th Oct 1918Box 20 \ 7  Scan098
List of parts sent from the United States for which experimental work is required.30th Jan 1920Box 20 \ 7  Scan099


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