2520-00-451-2680 HOUSING,CLUTCH Index 4820-00-451-2682 VALVE,CHECK

National Stock Number:
3020-00-451-2681

Federal Supply Class:
3020

National Item Identification Number:
004512681

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:
3020004512681SCY13E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE
9322C300487557LOCKHEED CORP LOCKHEED ELECTRONICS CO INC
AB550-96CT187301351SOUTHERN GEAR & MACHINE INC
AB550-96CT18730CU17AEROSPACE GEAR INC
9322C300494117BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.
AB550-96CT18739W957DYNACO GEARS INC


Techincal Specification:
ATTACHMENT METHODCLAMP
BORE NOMINAL DIAMETER0.187 INCHES BOTH ENDS
BORE STYLEPLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.188 INCHES FIRST END
FACE NOMINAL WIDTH0.125 INCHES
HUB STYLE DESIGNATORSPLIT FIRST END
HUB NOMINAL DIAMETER0.250 INCHES FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB
MATERIALALUMINUM ALLOY 2024 FIRST GEAR
MATERIALALUMINUM ALLOY 2024 SECOND GEAR
MATERIALSTEEL COMP 303 HUB
MATERIALSTEEL CORROSION RESISTING SPRING
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.313 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER1.098 INCHES
PITCH DIAMETER0.9990 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENTANODIZE FIRST GEAR
SURFACE TREATMENTANODIZE SECOND GEAR
SURFACE TREATMENTPASSIVATE HUB
TEETH QUANTITY96
TOOTH FORMSTANDARD


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