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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 of specifications for Hypoid Gears, Summary No. 1000, from Gleason Works.

Identifier  ExFiles\Box 98\1\  scan0171
Date  8th August 1939
  
CONCAVE (GEAR TOOTH BEARING)
HYPOID GEARS
SUMMARY NO. 1000
GLEASON WORKS
ROCHESTER, N. Y., U. S. A.{Mr Adams}
M'F'G.{Mr Griffiths - Chief Accountant / Mr Gnapp} SOFT
OFFSET LAP

PINION SETTINGS
DEVELOPED SETTINGS

FOR ROLLS ROYCE, LTD.
COMBINATION 13x43
DRIVE PRESSURE V 18° 15' REVERSE PRESSURE V 24° 16'
PINION SPIRAL V 45° 11' GEAR SPIRAL V 35° 37'
CONE DISTANCE 4.478" GEAR FACE 1 3/16 D.P. 5.059
OFFSET OF PINION .650" BELOW CENTER

GENERAL DIMENSIONS
NO. | ITEM | PINION | GEAR
1 | PART NUMBER | GB4994 | GB4995
2 | REF. B. P. NUMBER
3 | ADDENDUM | | .113"
4 | WORKING DEPTH | | .321"
5 | WHOLE DEPTH | .364" | .362"
6 | FACE ANGLE | 21° 17' | 73° 4'
7 | PITCH ANGLE | 18° 35' | 71° 38'
8 | ROOT ANGLE | 16° 43' | 68° 27'
9 | DEDENDUM ANGLE | | 3° 11'
10 | OUTSIDE DIAMETER | 3.375" | 8.571"
11 | CONE CENTER TO CROWN | 4.332" | 1.305"
12 | CONE CENTER TO BACK | 4.682" | 2.291"
13 | NORMAL CHORD. ADDEN. | *.185" | *.098"
14 | NORMAL CHORD. THICK. | *.259" | *.180"
15 | HAND OF SPIRAL | L | R
16 | CUTTING METHOD | FIXED SETTING | SPREAD BLADE
17 | MOUNTING DISTANCE | 4.525" | 2.350"
18 | SOFT MOUNTING DISTANCE | 4.528"
19 | DRIVER PINION | ROTATION C.W.

GEAR SETTINGS
ROUGHING CUTTER SPECIFICATIONS
NO. 20 | DIAMETER 9" | POINT WIDTH .050".025"R
NO. 21 | CUTTER AXIAL POSITION SLIDING BASE POS. | 18° 0' | 24° 0' | A .005"
15" SPIRAL BEVEL ROUGHER SETTINGS
NO. 22 | MACH. ROOT ∢ | 68° 27'
NO. 23 | HORIZONTAL | OUT 1.796"
NO. 24 | ANGULAR | UP 16° 21'
FINISHING CUTTER SPECIFICATIONS
NO. 25 | CUTTER NUMBER | #4 1/2-17 1/2 I, 28°-0
NO. 26 | FINISHING CUTTER DIAM. | 9"
NO. 27 | FINISHING POINT WIDTH | .090".025"R
15", No.16 SPIRAL GENERATOR SETTINGS
NO. 28 | MACHINE ROOT V | 68° 27'
NO. 29 | HORIZONTAL (15") | OUT 1.305"
NO. 30 | VERTICAL (15") | UP 3.658"
| RADIAL (#16) | 3.884"
| CRADLE ANGLE (#16) | 70° 22'
| MACH. CENTER TO BACK | 2.401"
| CUTTER AXIAL POS. SLIDING BASE | A .102"
| RATIO CHANGE GEARS Nc/75 3/10 | DR. 48 STUD 90 DN. 56 | DR. 58 STUD DN. 74 | DR. 97 STUD DN. 100
| TEST ROLL | 30° CRADLE | 51° 53' WORK.

ROUGHING
ROUGHING CUTTER SPECIFICATIONS
NO. 32 | DIAMETER 9" FT. WIDTH .050:.025R | IN. BLADE V 28°-0 | OUT. BL. V 14°0'
NO. 33 | MACHINE ROOT ANGLE | 16° 43'
NO. 34 | CUTTER AXIAL LOCATION SLIDING BASE POS. | ADVANCE .005"
NO. 35 | MACH. CENTER TO BACK | 4.707"
15" SPIRAL BEVEL ROUGHER SETTINGS
NO. 36 | HORIZONTAL | OUT 1.239"
NO. 37 | ANGULAR | DOWN 14° 7'
15", No.16 HYPOID GENERATOR SETTINGS
NO. 38 | HORIZONTAL | OUT .846"
NO. 39 | VERTICAL | DOWN 3.172"
NO. 40 | OFFSET OF BLANK | 0
NO. 41 | RADIAL | 3.283"
NO. 42 | CRADLE ∢ | 284° 56'
| RATIO CHANGE GEARS Nc/75 9/10 | DR. 63 STUD 70 DN. 69 | DR. 48 STUD 65 DN. 66 | DR. 67 STUD DN. 91
| TEST ROLL | 20° CRADLE | 62° 44' WORK

15" HYPOID GENERATOR FINISHING
| | BOTTOM | TOP
NO. 43 | MACHINE ROOT ∢ | 16° 43' | 17° 3'
NO. 44 | MACH. CENTER TO BACK | 4.398" | 4.683"
NO. 45 | CUTTER NUMBER | #21-17 1/2 O.B. | #36-25 I.B.
NO. 46 | POINT DIAMETER (.025" BLADE RADIUS) | 8.680" | 9.200"
NO. 47 | OFFSET OF BLANK | DOWN .757" | DOWN .589"
NO. 48 | CUTTER AXIAL LOCATION | WITHDRAW .165" | WITHDRAW .231"
NO. 49 | HORIZONTAL | OUT .717" | OUT 1.740"
NO. 50 | VERTICAL | DOWN 3.660" | DOWN 2.953"
NO. 51 | CUTTER SPINDLE V | IN 0° 41' | IN 2° 34'
NO. 52 | CUTTER COLUMN V | DOWN 0° 43' | IN 2° 27'
| RATIO CHANGE GEARS | DRIVER 80 STUD 54 | DRIVEN | DRIVER 48 STUD 68 | DRIVEN
| CHANGE GEARS | 69 97 | | 77 51 |
| TEST ROLL | CRADLE 20° WORK 70° 15' | CRADLE 20° WORK 71° 3'

V & H CHECK SOFT GEAR WITH SOFT PINION
| | BOTTOM | TOP
| | TOE | HEEL | TOTAL | TOE | HEEL | TOTAL
| V | +9 | -11 | 20 | V | -6 | +20 | 26
| H | -10 | +14 | 24 | H | +4 | -28 | 32
BACKLASH ALLOWANCE .004"-.006"

CUSTOMER'S ORDER NO. | SALES ORDER NO. | NO. OF PAIRS | DATE
2324 | AD4310 | 1 SOFT 3 HARD | JULY 25/1939.

MADE OUT BY Fudak | DATE aug 8, 1939 | CHECKED BY W. Jones
* MEASUREMENT AT MIDDLE OF FACE
FORM EO 324
  
  


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