Blueprint for a crankshaft sprocket for the Cadillac Motor Car Co.
| Identifier | ExFiles\Box 128\3\ scan0145 | |
| Date | 9th October 1929 | |
| DO-4866 TOOTHSPACE KEYWAY 3°-12'-51" 67°-30' .251/.253 1.622/1.627 TYPE #766 STAMP HERE STAMP 'O' HERE A 3.339/3.349 O.D. 1.489/1.490 REAM 1.5010/1.5015 GRIND 1 5/8 1 1/8 1/2 THESE FACES MUST BE SQUARE WITH BORE WITHIN .004 TOTAL INDICATOR READING. 3/32 CHAMFER AT 45° #6 GUIDE GROOVE .375 PITCH - TYPE # 766 --- 28 TEETH - 3.349 P.D. P.D. MUST NOT BE OVER .003 ECCENTRIC. FINISH ALL OVER. BREAK ALL SHARP CORNERS BEFORE HARDENING. CARBONIZE & HARDEN 1/32 DEEP. CAUTION DO NOT SCALE BLUE PRINT. A TOLERANCE OF PLUS OR MINUS .010" IS ALLOWED ON ALL DIMENSIONS UNLESS OTHERWISE SPECIFIED REVISION TABLE: TRANS NO. | DATE | MARK | REVISION 2080 | 10-9-29 | | Released 2156 | 3-26-30 | A | WAS 3.369/3.389 O.D. 2156 | 3-26-30 | B | WAS TYPE #49 SPECIAL STAMPED: APR 2 1934 CUSTOMER'S PART No 881807 COMPANY: MORSE CHAIN COMPANY, ITHACA, NEW YORK, DETROIT OFFICE, DETROIT, MICH. FOR: CADILLAC MOTOR CAR CO. DETROIT, MICH. TITLE: CRANKSHAFT SPROCKET MATERIAL: O.H. STEEL SCALE: FULL SIZE DWN: C.F. Cieske DATE: 10-8-29 CK {Mr Clark} 'D: Merrell Huffy DATE: 10-9-29 PART NUMBER: DO-4866 | ||
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).