3020-00-020-3919 GEAR CLUSTER Index 6605-00-020-3921 RIDER RIM AND MOVER

National Stock Number:
3020-00-020-3920

Federal Supply Class:
3020

National Item Identification Number:
000203920

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:
3306-69190073CMC ELECTRONICS INC


Techincal Specification:
MATERIALSTEEL COMP 303 HUB
STEEL TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TY 303,COND A CANCELLED FED SPEC 1ST MATERIAL RESPONSE HUB
QQ-S-766,CL 302,COND A FED SPEC 2ND MATERIAL RESPONSE TEETH
SURFACE TREATMENTPASSIVATE OVERALL
TEETH QUANTITY60
PRESSURE ANGLE14.5000 DEGREES
STYLE DESIGNATORPROTRUDING HUBS
PITCH DIAMETER1.2500 INCHES NOMINAL
NOMINAL OUTSIDE DIAMETER1.2920 INCHES
FACE NOMINAL WIDTH0.062 INCHES
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.185 INCHES FIRST END
0.063 INCHES SECOND END
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.0908 INCHES BOTH ENDS
HUB STYLE DESIGNATORPLAIN BOTH ENDS
HUB NOMINAL DIAMETER0.312 INCHES FIRST END
0.185 INCHES SECOND END
THE MANUFACTURERS DATA
MANUFACTURERS CODE90073
DESIGN CONTROL REFERENCE3306-691


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