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).
Visit to Adamant Engineering Co. concerning a ball bearing failure in a steering component.
Identifier | ExFiles\Box 153\2\ scan0046 | |
Date | 8th June 1936 | |
To E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Ev.{Ivan Evernden - coachwork} X1300 Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}25/KW.8.6.36. Visit to Adamant Engineering Co. We visited the Adamant Engineering Co. on the 26th May, in connection with the recent failure of a ball bearing on the 25/30 HP. steering. They agreed with us that the reduced radius of ball track should materially increase the load capacity of the bearing, and are going to introduce the new dimensions as soon as possible. Unfortunately, manufacture has proceeded so far on the 405 rollers ordered by us, that the altered radius cannot be applied to these. In the case of Wraith parts ordered by the Experimental Dept., the reduced radius can be applied without scrap. They are going to make as soon as possible a special 25 H.P. cam for the purpose of rig tests and three 25 H.P. rollers with reduced track radius for experimental purposes. Commdr. Matravers pointed out a difficulty concerning the proposal to have the ball bearings produced completely and matched up in units by a ball bearing manufacturer. The Adamant Co. apparently grind the tooth faces on the roller by setting up from the bearing tracks. If this sequence of manufacture were maintained and the roller teeth were still to be finished by the Adamant Co., then the roller would have to make two journeys between the Adamant Co. and the ball bearing manufacturer during its production. The best way to overcome this difficulty would appear to be to have the roller made entirely by the ball bearing manufacturer or, alternatively, if the latter cannot case-harden nickel chrome steel, to have the roughing and hardening done by Adamants and all finishing by the ball bearing people. The Adamant Co. would be agreeable to either of these methods of production. We intend to see Messrs. Ransome & Marles as to whether they can produce the roller completely. | ||