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 of a second and third speed clutch component with internal and external splines.
| Identifier | ExFiles\Box 124\3\ scan0422 | |
| Date | 16th June 1936 | |
| BUICK MOTOR CO. FLINT, MICH., U.S.A. ENGINEERING DEPARTMENT CHANGE DATE E) TRACED; 1.000 DIA. AND 1.3201 ADDED REQ. 27280 8-18-36 F) 3 1/8 DIA. TO 2 11/16 DIA. REQ. 27519 10-3-36 1.000 DIA. JIG PIN 1.3201 TO ¢ OF PIN VIEW OF TEETH & GROOVE DOUBLE SIZE TOOTH CHAMFER 36°45' RADIUS AS DEVELOPED BY CUTTER .005/.015 .1288 CHORDAL THICKNESS .072 VIEW OF EXTERNAL TOOTH FOUR TIMES SIZE HANDWRITTEN TEXT: COAST SIDE ON SECOND SPACED SIDE GRIND & POLISH RELIEVE 14 TEETH .013 TO .018 AS SHOWN THIS END ONLY STAMP LETTER "S" HERE .577/.582 DIA. HOLE MUST BE ON ¢ OF EXTERNAL TOOTH SPACE WITHIN .005 BOTH SIDES SECTION A-A SECTION B-B SECTION C-C SECTION THRU SPLINE FOUR TIMES SIZE SPLINES & EXTERNAL TEETH MUST BE CONCENTRIC WITHIN .002 TOTAL INDICATOR READING EXTERNAL SPLINE SPECIFICATIONS: 24 TEETH 2.000 P.D. 12/14 PITCH 27 1/2° PRESSURE ANGLE .072 DEDENDUM .142 FULL DEPTH INTERNAL SPLINE SPECIFICATIONS: 12 TEETH 1.200 P.D. 10/20 PITCH 20° PRESSURE ANGLE .061 FULL DEPTH WIRE BRUSH TEETH FINISH ALL OVER HEAT TREAT CASE HARDEN DEPTH OF CASE .030-.045 DRAW AT 400° F.{Mr Friese} FOR 30 MIN. ROCKWELL HARDNESS C 55-60 DO NOT SCALE - REPORT ERRORS BERR ALL DRILLED HOLES COUNTERSINK ALL TAPPED HOLES 1/64x45° ±.010 ALLOWED ON ALL FRACTIONAL DIMENSIONS DR. VIGH TR.{Capt. F. W. Turner - Finance} REP. VIGH CH. M.L.W. SCALE FULL MATERIAL: H.R.S. SPEC. NO. 3115-A DATE 6-16-36 CLUTCH - SECOND & THIRD SPEED 1298943 VARIOUS DIMENSIONS: 2-3/32, 25/32, 1-11/16 BORE, 1/8 R, 11/64 DRILL, 3/32 x 45° CHAMFER BOTH SIDES, GRIND TO THIS DIA., TURN SMOOTH, 1.215/1.216 DIA., 2.499/2.501, 2.137/2.140 O.D. OF SPLINES, 1.337/1.338 DIA., 1.276 DIA., .161, .577/.582 REAM, CENTRAL, .110/.120, .330/.340 | ||