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National Stock Number: 3020-00-388-9518
Federal Supply Class: 3020
National Item Identification Number: 003889518
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.
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Manufacturer Information:
8007992 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
MATERIAL | ALUMINUM ALLOY 2024 OVERALL | SURFACE TREATMENT | PASSIVATE HUB | TEETH QUANTITY | 147 | TOOTH FORM | STANDARD | PRESSURE ANGLE | 14.5000 DEGREES | PRECISION CLASSIFICATION | QUALITY NUMBER 8 | STYLE DESIGNATOR | PERIPHERAL FACE, HUBLESS | PITCH DIAMETER | 3.0625 INCHES NOMINAL | NOMINAL OVERALL LENGTH | 0.766 INCHES | FACE NOMINAL WIDTH | 0.370 INCHES | ATTACHMENT METHOD | MOUNTING HOLE | MOUNTING HOLE TYPE AND QUANTITY | 1 THREADED TRANSVERSELY THROUGH HUB, FIRST END | THE MANUFACTURERS DATA | | MANUFACTURERS CODE | 18876 | DESIGN CONTROL REFERENCE | 8007992 |
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