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).
Summary sheet for the settings and dimensions of Hypoid Gears, Summary No. 823.
| Identifier | ExFiles\Box 92\5\ scan0151 | |
| Date | 28th September 1937 | |
| FORM F.E.D 641 HYPOID GEARS SUMMARY NO. 823 GLEASON WORKS ROCHESTER N.Y. U.S.A. CONCAVE (GEAR TOOTH BEARING) CONVEX (GEAR TOOTH BEARING) FOR: ROLLS ROYCE LTD. COMBINATION: 8x34 GEAR PITCH: 3.4 GEAR FACE: 1.750" GEAR CONE DISTANCE: 5.146" MADE OUT: J.{Mr Johnson W.M.} M.{Mr Moon / Mr Moore} Gove DATE: Sept. 28.1937 CHECKED: L. Warner DATE: Sept 29 1937 DRIVE PRESSURE ∠: 18°15' REVERSE PRESSURE ∠: 24°15' SPIRAL ∠: GEAR 33°36' PINION 44°57' OFFSET OF PINION BELOW CENTER: .850" GENERAL DIMENSIONS Nº | ITEM | PINION | GEAR 1 | PART NUMBER | | 2 | ADDENDUM | | .104" 3 | WORKING DEPTH | | .489" 4 | WHOLE DEPTH | .552" | .550" 5 | FACE ANGLE | 18°16' | 77°30' 6 | PITCH ANGLE | 13°55' | 76°20' 7 | ROOT ANGLE | 12°16' | 71°23' 8 | DEDENDUM ANGLE | | 4°57' 9 | OUTSIDE DIAMETER | 3.497" | 10.049" 10 | CONE CENTER TO CROWN | 5.297" | 1.115" 11 | CONE CENTER TO BACK | 5.730" | 2.387" 12 | NORMAL CHORD. ADDEN * | .330" | .087" 13 | NORMAL CHORD. THICK * | .419" | .221" 14 | HAND OF SPIRAL | L | R 15 | CUTTING METHOD | FIXED SETTING SPREAD BLADE 16 | MOUNTING DISTANCE | 5.313" | 2.525" 17 | SOFT MOUNTING DISTANCE | 5.316" | 18 | DRIVER PINION ROTATION | C.W. GEAR CUTTER SPECIFICATIONS Nº | DIAMETER | PT. WIDTH | I.B.∠ | O.B.∠ 24 | ROUGH | 9" | .090" | 18° | 24° 25 | FINISH | 9" ** | .130" | *#1-17½° | 25° CUSTOMER'S ORDER CUSTOMER'S ORDER Nº | SALES ORDER Nº | NO. OF PAIRS | DATE GEAR SETTINGS 15" GEAR ROUGHER 26 | MACHINE ROOT ∠ | ROUGH | 71°23' 27 | MACH. CENTER TO BACK | ROUGH | 2.387" 28 | HORIZONTAL | OUT | 2.346" 29 | ANGULAR | ROUGH ADV. | 16°45' 30 | CUTTER AXIAL | ROUGH ADV. | .010" 15" SPIRAL GENERATOR FINISH 31 | MACHINE ROOT ∠ | 71°23' 32 | MACH. CENTER TO BACK | 2.610" 33 | HORIZONTAL | OUT | 1.849" 34 | VERTICAL | UP | 3.748" 35 | CUTTER AXIAL POS. | ADV. | .211" 38 | 3/10 RATIO CHANGE GEARS NC-75 | DRIVER STUD DRIVEN: 37 67 39 | | DRIVER STUD DRIVEN: 47 83 40 | TEST ROLL 30° CRADLE 3/16" WORK Nº 14 GEAR GRINDER SETTINGS *3A (Section is blank) PINION ROUGHING SETTINGS ROUGHING CUTTER SPECIFICATIONS 57 | DIAMETER | PT. WIDTH | IB ∠ | OB ∠ | 9.500" | .060" | 26° | 17° 15" SPIRAL BEVEL ROUGHER SETTINGS 58 | MACHINE ROOT ∠ | 12°16' 60 | MACH. CENTER TO BACK | 5.878" 61 | CUTTER AXIAL POS. | ADV. | .010" 15 HYPOID GENERATOR SETTINGS 62 | HORIZONTAL | OUT | 1.914" | WITH ADV 63 | ANGULAR | DOWN | 15°7' | WITH 64 | HORIZONTAL | OUT | 1.464" 65 | VERTICAL | DOWN | 3.389" 66 | OFFSET OF BLANK | 0 67 | CUTTER SPINDLE ∠ | 0 68 | CUTTER COLUMN ∠ | 0 Nº 16 HYPOID GENERATOR SETTINGS (Section is blank) Nº 15 PINION ROUGHER SETTINGS (Section is blank) 80 | 3/10...RATIO CHANGE GEARS. NC-75 | DRIVER STUD DRIVEN: 55 49, DRIVER STUD DRIVEN: 70 63 | TEST ROLL 20°CRADLE 83°9' WORK PINION FINISHING SETTINGS (Header: BOTTOM Nº 16 HYPOID GENERATOR FINISHING TOP) Nº | ITEM | BOTTOM | TOP 91 | MACHINE ROOT ∠ | 12°16' | 12°16' 92 | MACH. CENTER TO BACK | 5.162" | 5.516" 93 | CUTTER BLADES | *21-17½°-T.B. | *48-25°-T.B. 94 | POINT DIAMETER | 8.380" | 9.460" 95 | OFFSET OF BLANK | .984" | .765" 96 | CUTTER AXIAL POS. WITH | .150" | .400" 97 | HORIZONTAL | OUT .911" | OUT 2.411" 98 | VERTICAL | DOWN 4.042" | DOWN 2.959" 99 | CUTTER SPINDLE ∠ | UP 0°1' | DOWN 3°22' 100 | CUTTER COLUMN ∠ | OUT 0°1' | OUT 3°8' RATIO CHANGE GEARS | BOTTOM (DRIVER STUD DRIVEN) | TOP (DRIVER STUD DRIVEN) | 83 72 | 80 89 | 89 77 | 89 77 TEST ROLL BOTTOM: 20°CRADLE 88°49'WORK TOP: 20°CRADLE 89°20'WORK V & H CHECK: GEAR WITH ........ PINION Table is present but all values are blank. NOTES: * THICKNESS MEASUREMENTS ARE TAKEN AT MIDDLE OF FACE ** SPECIAL 1/2 BLADE CUTTER IS REQUIRED TO CUT GEAR ; DUE TO LONG FACE BACKLASH ALLOWED .008"-.010" UNDEVELOPED SETTINGS NOTE: THIS SUMMARY PROVIDES CUTTER CLEARANCE FOR 1" SO' DIAM. FRONT BEARING. REFER TO WORK SHEETS S*498 | ||