List of specifications and dimensions for a 'Delage' worm gear.
| Identifier | ExFiles\Box 21\4\ Scan135 | |
| Date | 5th February 1923 | |
| X/3525 5. 2. 23. PARTICULARS OF "DELAGE" WORM. Top diameter...........3.062 Pitch "...........2.750 Bottom "...........2.420 Helix angle..........17° 45 mins. Angle of tooth.........10° Linear pitch...........500 4 start..............4 start. Lead.................2" Bottom of tooth........ .117. ---------- RHC. {R. H. Coverley - Production Engineer} | ||
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).