3020-00-969-8831 GEAR,SPUR Index 5305-00-969-8834 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
3020-00-969-8832

Federal Supply Class:
3020

National Item Identification Number:
009698832

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:
1004934618876U S ARMY AVIATION AND MISSILE COMMAND
MAB550-92CT120001351SOUTHERN GEAR & MACHINE INC


Techincal Specification:
ATTACHMENT METHODCLAMP
BACKLASH DESIGNATIONGRADE C
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.120 INCHES BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.250 INCHES FIRST END
FACE NOMINAL WIDTH0.125 INCHES
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB
HUB NOMINAL DIAMETER0.188 INCHES FIRST END
HUB STYLE DESIGNATORSPLIT FIRST END
III MATERIALALUMINUM ALLOY 2024 FIRST GEAR
III MATERIALALUMINUM ALLOY 2024 SECOND GEAR
III MATERIALSTEEL COMP 303 HUB
III MATERIALSTEEL CORROSION RESISTING SPRING
PITCH DIAMETER0.9580 INCHES NOMINAL
PRECISION CLASSIFICATIONQUALITY NUMBER 10
PRESSURE ANGLE20.0000 DEGREES
PROPRIETARY CHARACTERISTICSPACS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.313 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER0.9792 INCHES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE FIRST GEAR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR
SURFACE TREATMENTANODIZE FIRST GEAR
SURFACE TREATMENTANODIZE SECOND GEAR
SURFACE TREATMENTPASSIVATE HUB
TEETH QUANTITY92
TOOTH FORMSTANDARD


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