3020-01-161-4869 GEAR,SPUR Index 3020-01-161-4871 GEAR SECTOR,SPUR

National Stock Number:
3020-01-161-4870

Federal Supply Class:
3020

National Item Identification Number:
011614870

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:
1315290318876U S ARMY AVIATION AND MISSILE COMMAND
13152903-118876U S ARMY AVIATION AND MISSILE COMMAND
806990-104896214RAYTHEON COMPANY
PABC59-48P223266SECS, INC.
Z3H48P200328DESIGNATRONICS INCORPORATED


Techincal Specification:
ATTACHMENT METHODCLAMP
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.125 INCHES BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.221 INCHES FIRST END
FACE NOMINAL WIDTH0.104 INCHES
HUB NOMINAL DIAMETER0.187 INCHES FIRST END
HUB STYLE DESIGNATORSPLIT FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.221 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER0.5208 INCHES
PITCH DIAMETER0.5000 INCHES NOMINAL
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
TEETH QUANTITY48
TOOTH FORMSTANDARD


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