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		                        | National Stock Number:
 3020-00-200-2050
 
 Federal Supply Class:
 3020
 
 National Item Identification Number:
 002002050
 
 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:
 
 | 4B7785 | 11083 | CATERPILLAR INC |  | 4B7785 | 79500 | WESTINGHOUSE ELECTRIC CORP | 
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 Techincal Specification:
 
 | BODY STYLE | PLAIN, SOLID |  | BORE NOMINAL DIAMETER | 1.499 INCHES BOTH ENDS |  | BORE STYLE | W/ KEYWAY BOTH ENDS |  | FACE NOMINAL WIDTH | 0.625 INCHES |  | HARDNESS RATING | 22.8 ROCKWELL C MINIMUM  AND 29.9 ROCKWELL C MAXIMUM OVERALL |  | HELIX ANGLE | 25.8581 DEGREES |  | HUB NOMINAL DIAMETER | 2.250 INCHES FIRST END |  | HUB STYLE DESIGNATOR | PLAIN FIRST END |  | KEYWAY NOMINAL WIDTH | 0.189 INCHES BOTH ENDS |  | MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |  | PITCH DIAMETER | 3.1115 INCHES NOMINAL |  | MATERIAL | STEEL OVERALL |  | NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM | 0.847 INCHES BOTH ENDS |  | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.248 INCHES FIRST END |  | NOMINAL OUTSIDE DIAMETER | 3.309 INCHES |  | PRESSURE ANGLE | 20.0000 DEGREES |  | STYLE DESIGNATOR | PROTRUDING HUB |  | TEETH QUANTITY | 28 |  | TEETH TYPE | SINGLE HELIX |  | SPECIAL FEATURES | TIMING MARK LETTER C ON TEETH 134 DEG 59MIN 53 SECCCW FROM TIMING MARK LETTER M BETWEEN TEETH ONCENTER LINE OF KEYWAY ON HUB END |  | TOOTH DIRECTION | RIGHT |  | TOOTH FORM | STANDARD | 
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