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		                             National Stock Number: 3020-00-391-4050
  Federal Supply Class: 3020
  National Item Identification Number: 003914050
  Description: GEAR,HELICAL
  Detail: A GEAR, CYLINDRICAL IN FORM, WITH TEETH ON THE OUTER SURFACE AT AN ANGLE TO THE AXIS OF THE GEAR. SEE ALSO GEAR, ANTIBACKLASH, HELICAL:
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  Manufacturer Information:
 | 3238729 | 55380 | HATCH & KIRK, INC. |  | 3238729 | 72915 | GENERAL MOTORS CORP ELECTRO-MOTIVE DIV |  | K-3238729 | 18954 | KORODY-COLYER CORP A CR INDUSTRIES CO |  | K323879 | 18954 | KORODY-COLYER CORP A CR INDUSTRIES CO |   
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  Techincal Specification:
 | BODY STYLE | WEBBED, WITH LIGHTENING HOLES |  | BORE NOMINAL DIAMETER | 2.0000 INCHES BOTH ENDS |  | BORE STYLE | PLAIN BOTH ENDS |  | FACE NOMINAL WIDTH | 1.500 INCHES |  | HARDNESS RATING | 10.0 ROCKWELL C MINIMUM  AND 16.0 ROCKWELL C MAXIMUM OVERALL |  | HELIX ANGLE | 27.3217 DEGREES |  | HUB NOMINAL DIAMETER | 2.997 INCHES FIRST END |  | HUB NOMINAL DIAMETER | 2.997 INCHES SECOND END |  | HUB STYLE DESIGNATOR | PLAIN BOTH ENDS |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-890,CLASS B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |  | PITCH DIAMETER | 10.8000 INCHES NOMINAL |  | MATERIAL | STEEL OVERALL |  | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.938 INCHES BOTH ENDS |  | NOMINAL OUTSIDE DIAMETER | 11.084 INCHES |  | PRESSURE ANGLE | 20.0000 DEGREES |  | SPECIAL FEATURES | 2 COUNTERWEIGHTS,OIL PLUG,2 RIVETS,2 COUNTERWEIGHT HOLES 5/8 IN. DIA LOCATED 3 IN. BELOW CENTER OF BORE AND 2 IN. TO LEFT AND RIGHT OF LOWER VERTICAL CENTER LINE,FIGURE 6 STAMPED ON SIDE OF GEAR FACE ON CENTER LINE OF TOOTH SPACE 36 DEG 11 MIN CW FROM LOWER VERTICAL CENTER LINE,FIGURE 5 STAMPED ON SIDE OF GEAR FACE ON CENTER LINE OF TOOTH SPACE 73 DEG 20 MIN CW FROM FIGURE 6,FIGURE 7 STAMPED ON SIDE OF GEAR FACE ON CENTER LINE OF TOOTH SPACE 86 DEG 40 MIN CW FROM FIGURE 5,30.189 IN. DIA OIL HOLES,1 LOCATED ON HUB END 1-15/64 IN. BELOW CENTER OF BORE ON LOWER VERTICAL CENTER LINE AND DRILLED 2-13/16 IN. DEEP,2 LOCATED ON SIDE OF HUB 11/16 IN. FROM EACH HUB END AND DRILLED AT A 6 DEG ANGLE TO MEET OIL HOLE DRILLED FROM HUB |  | STYLE DESIGNATOR | PROTRUDING HUBS |  | TEETH QUANTITY | 54 |  | TEETH TYPE | SINGLE HELIX |  | TOOTH DIRECTION | LEFT |  | TOOTH FORM | STUB |   
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