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).
Letter from Hardy Spicer & Co. Ltd. discussing journal investigation and radial clearance tolerances.
Identifier | ExFiles\Box 148\4\ scan0087 | |
Date | 1st November 1938 | |
1262. HARDY SPICER & CO. LIMITED. TELEPHONE: BIRCHFIELDS 4504-9 (6 LINES) TELEGRAMS & CABLES: AUTOJOINTS, BIRMINGHAM CODE: BENTLEY'S PHRASE LONDON OFFICE 54 ST.{Capt. P. R. Strong} THOMAS STREET, LONDON S.E.1 TELEPHONE: HOP 0703 Manufacturers of HARDY SPICER UNIVERSAL JOINTS AND PROPELLER SHAFTS · GENUINE HARDY FLEXIBLE COUPLINGS BRITISH BOUND BROOK OIL-LESS & COMPO OIL-RETAINING BEARINGS ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY Registered Office and Works BIRCH ROAD, WITTON BIRMINGHAM·6 ENGLAND OUR REF JAD.MW YOUR REF DA.{Bernard Day - Chassis Design}2/G 1st November,1938. Messrs. Rolls Royce Limited. D E R B Y. Attention of Mr.Grylls. Dear Mr.Grylls, We are investigating the journal which you handed to me but in the meantime I am dealing with the question of radial clearance. You gave me a measure figure of .003 that existed on the sample and we took this to be on the diameter and not on the radius. Checking up our tolerances we find it is possible to have between .001 and .003. In case the details will interest you they are as follows:- 2 Rollers @ ............ .0940 max = .1880 Maximum diameter of pin .......... = .6580 .8460 Min. bore of race........................... .847 - .846 .001 Min. Clearance. 2 Rollers @ ............ .09375 min. =.18750 Min.diameter of pin............... =.65750 .84500 Maximum bore of race ............... .848 - .845 .003 Max.Clearance. We will write again as soon as we have gone further into the investigation. Yours faithfully, p.p.HARDY,SPICER & CO. LIMITED. J G Daniel Director. | ||