3020-00-918-3820 GEAR CLUSTER Index 3020-00-918-3822 GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-918-3821

Federal Supply Class:
3020

National Item Identification Number:
009183821

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:
537-103-02807421L3HARRIS INTERSTATE ELECTRONICS CORPORATION
537-103-02807CR8ADVANCED LOGIC RESOURCES INC


Techincal Specification:
ATTACHMENT METHODCLAMP
BORE NOMINAL DIAMETER0.187 INCHES BOTH ENDS
BORE STYLEPLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.251 INCHES FIRST END
FACE NOMINAL WIDTH0.104 INCHES
HUB NOMINAL DIAMETER0.248 INCHES FIRST END
HUB STYLE DESIGNATORSPLIT FIRST END
MATERIALALUMINUM ALLOY OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.317 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER1.278 INCHES
PITCH DIAMETER1.2500 INCHES NOMINAL
PRECISION CLASSIFICATIONQUALITY NUMBER 12
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENTANODIZE OVERALL
TEETH QUANTITY90
TOOTH FORMSTANDARD


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