3020-00-020-3903 GEAR AND PINION SHA Index 3020-00-020-3905 GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-020-3904

Federal Supply Class:
3020

National Item Identification Number:
000203904

Description:
GEAR,ANTIBACKLASH,SPUR

Detail:
An item having one fixed gear and one free gear, both having the same complement of spur gear teeth, mounted on a common hub. The free gear is attached to the fixed gear by springs and operates as one gear. Upon installation with the mating gear, the teeth of the free moving gear are preset to mesh with teeth other than those of the fixed gear. This spring tension between the fixed gear and the free gear eliminates any free motion between the driver and the driven gear. The gear is used where identical and accurate transmitted motion between gears is required.


Manufacturer Information:
588-3318507-0090073CMC ELECTRONICS INC


Techincal Specification:
ATTACHMENT METHODMOUNTING HOLE
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.120 INCHES BOTH ENDS
END NOMINAL DIAMETER0.367 INCHES FIRST END
END NOMINAL LENGTH0.166 INCHES FIRST END
FACE NOMINAL WIDTH0.067 INCHES
FIRST STEP NOMINAL DIAMETER0.569 INCHES FIRST END
FIRST STEP NOMINAL LENGTH0.050 INCHES FIRST END
HUB STYLE DESIGNATOR1 STEP FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB
MATERIALSTEEL COMP 304 TEETH
MATERIALSTEEL COMP 303 HUB
MOUNTING HOLE THREAD SERIES DESIGNATORUNC TRANSVERSELY THROUGH HUB, FIRST END
MOUNTING HOLE TYPE AND QUANTITY2 THREADED TRANSVERSELY THROUGH HUB, FIRST END
MOUNTING HOLE NOMINAL THREAD SIZE0.086 INCHES TRANSVERSELY THROUGH HUB, FIRST END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.216 INCHES FIRST END
NOMINAL DISTANCE FROM END TO FIRST GROOVE0.594 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER1.2917 INCHES
PITCH DIAMETER1.2500 INCHES NOMINAL
PRECISION CLASSIFICATIONQUALITY NUMBER 10
PRESSURE ANGLE14.5000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENTPASSIVATE OVERALL
TEETH QUANTITY60
TOOTH FORMSTANDARD


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