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		                             National Stock Number: 3020-00-391-0927
  Federal Supply Class: 3020
  National Item Identification Number: 003910927
  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:
 | 3300001 | 55380 | HATCH & KIRK, INC. |  | 3300001 | 72915 | GENERAL MOTORS CORP ELECTRO-MOTIVE DIV |  | N29578PCA | 55380 | HATCH & KIRK, INC. |  | N29978PCA | 55380 | HATCH & KIRK, INC. |  | N29978PCA | 72915 | GENERAL MOTORS CORP ELECTRO-MOTIVE DIV |  | N29578PCA | 72915 | GENERAL MOTORS CORP ELECTRO-MOTIVE DIV |   
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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 |  | END NOMINAL DIAMETER | 2.997 INCHES BOTH ENDS |  | END NOMINAL LENGTH | 1.375 INCHES BOTH ENDS |  | FACE NOMINAL WIDTH | 2.000 INCHES |  | FIRST STEP NOMINAL DIAMETER | 4.125 INCHES BOTH ENDS |  | FIRST STEP NOMINAL LENGTH | 0.063 INCHES BOTH ENDS |  | HARDNESS RATING | 10.0 ROCKWELL C MINIMUM  AND 20.0 ROCKWELL C MAXIMUM OVERALL |  | HELIX ANGLE | 27.3217 DEGREES |  | HUB STYLE DESIGNATOR | 1 STEP 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 | 0.688 INCHES BOTH ENDS |  | NOMINAL OUTSIDE DIAMETER | 11.084 INCHES |  | PRESSURE ANGLE | 20.0000 DEGREES |  | STYLE DESIGNATOR | PROTRUDING HUBS |  | TEETH QUANTITY | 54 |  | TEETH TYPE | SINGLE HELIX |  | SPECIAL FEATURES | TWO COUNTERWEIGHTS,BOLTS,NUTS,OIL HOLES IN HUB,FIG 1 STAMPED BETWEEN TEETH ON SIDE OF GEAR 170 DEG 57 MIN CCW FROM UPPER CENTER LINE,FIG 4 STAMPED BETWEEN TEETH ON SIDE @OF GEAR 73 DEG @20 MIN CCW FROM FIG 1 |  | TOOTH FORM | STANDARD |  | TOOTH DIRECTION | LEFT |   
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