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National Stock Number:
3020-00-441-4869
Federal Supply Class:
3020
National Item Identification Number:
004414869
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:
| 9176943 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | P4-5-184S | 00141 | ROLLER BEARING CO OF AMERICA, INC |
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Techincal Specification:
| MATERIAL | ALUMINUM ALLOY BODY | | STEEL COMP 303S OR | | STEEL COMP 303SE HUB | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-268,COND T4 FED SPEC SINGLE MATERIAL RESPONSE BODY | | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE HUB | | SURFACE TREATMENT | ANODIZE BODY | | PASSIVATE HUB | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE BODY | | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE HUB | | TEETH QUANTITY | 184 | | TOOTH FORM | STANDARD | | PRESSURE ANGLE | 20.0000 DEGREES | | PRECISION CLASSIFICATION | QUALITY NUMBER 10 | | STYLE DESIGNATOR | PROTRUDING HUBS | | PITCH DIAMETER | 2.5540 INCHES MINIMUM AND | | 2.5550 INCHES MAXIMUM | | NOMINAL OUTSIDE DIAMETER | 2.583 INCHES | | FACE NOMINAL WIDTH | 0.104 INCHES | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.281 INCHES FIRST END | | 0.234 INCHES SECOND END | | BORE STYLE | PLAIN BOTH ENDS | | BORE NOMINAL DIAMETER | 0.500 INCHES BOTH ENDS | | HUB STYLE DESIGNATOR | PINNED FIRST END | | THREADED SECOND END | | HUB NOMINAL DIAMETER | 0.500 INCHES FIRST END |
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