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National Stock Number:
3020-01-211-4162
Federal Supply Class:
3020
National Item Identification Number:
012114162
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:
| 7-317221313 | 02731 | MCDONNELL DOUGLAS HELICOPTER CO INC | | 7-317221313-3 | 01351 | SOUTHERN GEAR & MACHINE INC | | 7-317221313-3 | 02731 | MCDONNELL DOUGLAS HELICOPTER CO INC | | 7-317221313-3 | 67047 | JAYGAR ASSOCIATES INC | | 7-317221313-3 | 67074 | TRIVENT ENGINEERING, INCORPORATED | | 7-317221313-3 | 8V613 | THE BOEING COMPANY |
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Techincal Specification:
| MATERIAL | ALUMINUM ALLOY 2024 FIRST GEAR | | STEEL CORROSION RESISTING HUB | | ALUMINUM ALLOY 2024 SECOND GEAR | | TEETH QUANTITY | 18 | | PRESSURE ANGLE | 20.0000 DEGREES | | STYLE DESIGNATOR | PROTRUDING HUB | | PITCH DIAMETER | 2.2500 INCHES NOMINAL | | NOMINAL OUTSIDE DIAMETER | 2.635 INCHES | | FACE NOMINAL WIDTH | 0.190 INCHES | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.237 INCHES FIRST END | | BORE STYLE | PLAIN BOTH ENDS | | BORE NOMINAL DIAMETER | 0.249 INCHES BOTH ENDS |
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