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).
Micro-examination report on the hardness and case thickness of a Bentley Universal Joint Pin.
| Identifier | ExFiles\Box 87\3\ scan0093 | |
| Date | 20th August 1937 | |
| Micro-Examination Report. M 1,389 X.237 BY.{R.W. Bailey - Chief Engineer} from H1/EJW. c. to Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} H1/EJW.2/JN.20.8.37. Laboratory BENTLEY UNIVERSAL JOINT PIN GB.2311. The hardness of the core beneath the damaged track was 223 Brinell. The hardness of the damaged case was :- 792 - V.P.N. (30 & 50 Kg). C 60 - Rockwell. These figures are in accordance with the drawing requirements. The thickness of the case on the track was .032". The case on the flange was tapered in section owing to the corners, as you will see from the attached photograph M 1,389/2. In the centre of the flange where the ends of the rollers have marked the case depth is about the same as that of the track. The remainder of the pin is returned herewith. We also return to Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} the letter from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} (Ref.Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/DPB/10.8.37. ) H1/E.J.W. HE | ||