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).
Engineering drawing for a clutch friction disc.
| Identifier | ExFiles\Box 129\1\ scan0096 | |
| Date | 24th November 1936 | |
| DR. NO. 67100 1/64 PUNCH 8 HOLES 3/16 PUNCH 8 HOLES 8 SLOTS - .047 SAW EQUALLY SPACED TO BE CUT AFTER BRONZE IS APPLIED 1/4 DRILL 8 HOLES 18 HOLES EQUALLY SPACED EXCEPT FOR 1 HOLE WHICH IS OFFSET AS SHOWN DRILL .1562 DIA +.005 -.000 1/8 DRILL - 16 HOLES AS SHOWN #74 BRONZE MIXTURE ROLLS-ROYCE, LTD. THEIR #G-84808 SECTION AA{D. Abbot-Anderson} Dimensions and specifications: 28°, 22 1/2°, 2, 3.4, .047 SAW, 1/2°, 5, 14°, 18°, 9/32 BRONZE, 4 1/4 R.{Sir Henry Royce}, 4 1/2 R.{Sir Henry Royce}, 4 3/4 R.{Sir Henry Royce} 7.762 DIA. ±.005 13.600 DIA. ±.025 7.3125 DIA. +.002 -.000 Section AA{D. Abbot-Anderson} details: .057 .063 BRONZE EACH SIDE .216 .226 ROUGH BLANK .202 .208 GRIND STEEL .080 ±.005 SIDES MUST BE FLAT WITHIN .015 VARIATION IN THICKNESS .002 Notes: TOOLS MUST BE STAMPED WITH "T" NO. & PARTS WITH "T" NO. & MAT'L LIMITS ON ALL FRACTIONAL MACHINE DIMENSIONS ± .010 REMOVE ALL PROJECTING EDGES AND SHARP CORNERS Title Block: THE CLEVELAND GRAPHITE BRONZE CO. CLEVELAND, OHIO CLUTCH FRICTION DISC SCALE: A.L.F. DR. # APP. OK. Huke APP. DR. NO. 100149 | ||