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		                        | National Stock Number:
 3020-00-423-8897
 
 Federal Supply Class:
 3020
 
 National Item Identification Number:
 004238897
 
 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:
 
 | 2B6916 | 11083 | CATERPILLAR INC | 
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 Techincal Specification:
 
 | BODY STYLE | WEBBED, WITH LIGHTENING HOLES |  | BORE NOMINAL DIAMETER | 1.492 INCHES BOTH ENDS |  | BORE STYLE | PLAIN BOTH ENDS |  | FACE NOMINAL WIDTH | 1.872 INCHES |  | HARDNESS RATING | 82.9 ROCKWELL B MINIMUM  AND 96.4 ROCKWELL B MAXIMUM OVERALL |  | HELIX ANGLE | 25.5439 DEGREES |  | HUB NOMINAL DIAMETER | 2.625 INCHES FIRST END |  | HUB NOMINAL DIAMETER | 2.625 INCHES SECOND END |  | HUB STYLE DESIGNATOR | PLAIN BOTH ENDS |  | MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE  AND AISI/SAE 1045 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |  | MATERIAL | STEEL COMP 1045 OVERALL |  | PITCH DIAMETER | 9.9750 INCHES NOMINAL |  | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.605 INCHES FIRST END |  | NOMINAL OUTSIDE DIAMETER | 10.256 INCHES |  | NOMINAL OVERALL LENGTH | 2.480 INCHES |  | PRESSURE ANGLE | 20.0000 DEGREES |  | STYLE DESIGNATOR | ONE PROTRUDING HUB, ONE FLUSH HUB |  | TEETH QUANTITY | 63 |  | TEETH TYPE | SINGLE HELIX |  | TOOTH DIRECTION | RIGHT |  | TOOTH FORM | STANDARD | 
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