4720-00-368-8236 HOSE,PREFORMED Index 3020-00-368-8238 GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-368-8237

Federal Supply Class:
3020

National Item Identification Number:
003688237

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:
752107101351SOUTHERN GEAR & MACHINE INC
901004-4C82577RAYTHEON COMPANY
9703-1002S12444DESIGNATRONICS INC PERFECT GEAR AND INSTRUMENT DIV


Techincal Specification:
ATTACHMENT METHODCLAMP
BORE NOMINAL DIAMETER0.125 INCHES BOTH ENDS
BORE STYLEPLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.172 INCHES FIRST END
FURNISHED ITEMS AND QUANTITY1 RETAINING RING AND 1 STOP PIN
FACE NOMINAL WIDTH0.104 INCHES
FIRST GROOVE NOMINAL DIAMETER0.290 INCHES SECOND END
FIRST GROOVE NOMINAL WIDTH0.029 INCHES SECOND END
HUB NOMINAL DIAMETER0.183 INCHES FIRST END
HUB NOMINAL DIAMETER0.312 INCHES SECOND END
HUB STYLE DESIGNATOR1 GROOVE SECOND END
HUB STYLE DESIGNATORSPLIT FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.050 INCHES SECOND END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.203 INCHES FIRST END
NOMINAL DISTANCE FROM END TO FIRST GROOVE0.021 INCHES SECOND END
NOMINAL OUTSIDE DIAMETER0.771 INCHES
PITCH DIAMETER0.7500 INCHES NOMINAL
PRECISION CLASSIFICATIONQUALITY NUMBER 10
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUBS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-STD-171,FINISH NO. 5.4.1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
TEETH QUANTITY72
TOOTH FORMSTANDARD


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