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).
Blueprint of a burnishing tool with a pilot for hand burnishing, showing the design of the broach.
| Identifier | ExFiles\Box 115\3\ scan0243 | |
| Date | 20th August 1934 | |
| LAP SMOOTH REMOVE ALL CORNERS FOR BURNISH TO .813/.8135 .8115, .812, .8125, .813, .8135, .814, .8145, .815 GRIND BEVEL OF 1° TO 2° ON CORNERS TO GIVE LAND OF UNIFORM WIDTH SECTION OF BUTTON SHOWING DETAIL OF LAND 4 TIMES SIZE BURNISHING TOOL WITH PILOT FOR HAND BURNISHING MATERIAL:- PARAGON OR EQUIVALENT PRINT SHOWING DESIGN OF BROACH Nº 548 DRN S.H. DATE 20-8-34 VANDERVELL PRODUCTS LTD WESTERN AVENUE PARK ROYAL W.3. 1°-2° 5/32" 1/32" 3/32" R.{Sir Henry Royce} 3/64" 3/8" .805 .807 4" 12 3/4" 5" .807 .809 | ||