3020-00-946-2206 GEAR,ANTIBACKLASH,SPUR Index 3020-00-946-2209 GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-946-2208

Federal Supply Class:
3020

National Item Identification Number:
009462208

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:
AB64H11C144F5C08783RAYTHEON CO
E61819108783RAYTHEON CO


Techincal Specification:
ATTACHMENT METHODCLAMP
BACKLASH DESIGNATIONGRADE C
BORE NOMINAL DIAMETER0.187 INCHES BOTH ENDS
BORE STYLEPLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.205 INCHES FIRST END
FACE NOMINAL WIDTH0.128 INCHES
HUB STYLE DESIGNATORSPLIT FIRST END
HUB NOMINAL DIAMETER0.250 INCHES FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-268,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALALUMINUM ALLOY OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.314 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER2.279 INCHES
PITCH DIAMETER2.2500 INCHES NOMINAL
PRECISION CLASSIFICATIONQUALITY NUMBER 11
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTANODIZE FIRST GEAR
TEETH QUANTITY144
TOOTH FORMSTANDARD


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