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		                        | National Stock Number:
 3020-00-739-4847
 
 Federal Supply Class:
 3020
 
 National Item Identification Number:
 007394847
 
 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:
 
 | 4H7384 | 11083 | CATERPILLAR INC | 
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 Techincal Specification:
 
 | ATTACHMENT METHOD | MOUNTING HOLE |  | BODY RECESS NOMINAL DEPTH | 0.970 INCHES FIRST END |  | BODY STYLE | WEBBED, OFFSET, WITH LIGHTENING HOLES |  | BOLT HOLE CIRCLE NOMINAL DIAMETER | 6.000 INCHES AXIALLY THROUGH BODY, FIRST END |  | BORE STYLE | PLAIN BOTH ENDS |  | BORE NOMINAL DIAMETER | 4.751 INCHES BOTH ENDS |  | FACE NOMINAL WIDTH | 1.625 INCHES |  | HARDNESS RATING | 59.0 ROCKWELL C MINIMUM OVERALL AND 64.0 ROCKWELL C MAXIMUM OVERALL |  | HELIX ANGLE | 25.5439 DEGREES |  | III MATERIAL | STEEL OVERALL |  | PITCH DIAMETER | 12.6667 INCHES NOMINAL |  | PRESSURE ANGLE | 20.0000 DEGREES |  | PROPRIETARY CHARACTERISTICS | PACS |  | MOUNTING HOLE NOMINAL DIAMETER | 0.506 INCHES AXIALLY THROUGH BODY, FIRST END |  | MOUNTING HOLE TYPE AND QUANTITY | 12 PLAIN AXIALLY THROUGH BODY, FIRST END |  | NOMINAL OUTSIDE DIAMETER | 12.500 INCHES |  | SPECIAL FEATURES | BODY SLOPES OUT 0.150 IN. PAST GEAR FACE |  | STYLE DESIGNATOR | HUBLESS, RECESSED BODY |  | TEETH QUANTITY | 80 |  | TEETH TYPE | SINGLE HELIX |  | TOOTH DIRECTION | LEFT |  | TOOTH FORM | STANDARD | 
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