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National Stock Number:
3020-01-141-3769
Federal Supply Class:
3020
National Item Identification Number:
011413769
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:
| 7241925P1 | 03538 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| BORE STYLE | PLAIN FIRST END | | FACE NOMINAL WIDTH | 0.175 INCHES | | HUB STYLE DESIGNATOR | PINNED FIRST END | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,CLASS 303,COND A FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763,CLASS 416,COND H FED SPEC 2ND MATERIAL RESPONSE BODY | | MATERIAL | STEEL COMP 303 AND STEEL COMP 416 BODY | | MOUNTING HOLE TYPE AND QUANTITY | 1 PLAIN AXIALLY THROUGH HUB, FIRST END | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.090 INCHES FIRST END | | NOMINAL OVERALL LENGTH | 0.390 INCHES | | PRECISION CLASSIFICATION | QUALITY NUMBER 12 | | PRESSURE ANGLE | 20.0000 DEGREES | | SPECIAL FEATURES | OUTSIDE DIAMETER 1.5281MIN 1.5312MAX IN.; PINNED ATTACHMENT METHOD; MOUNTING HOLE DIAMETER 0.076MIN 0.081MAX IN.; BORE PROVISION INCLUDED; BORE DIAMETER 0.2501MIN 0.2504MAX IN.; BORE LENGTH 0.39 IN.; FIRST END HUB DIAMETER 0.37MIN 0.375MAX IN.; FIRST END DISTANCE FROM END OF HUB TO CENTER OF TAPPED HOLE 0.125 IN.; CIRCULAR PITCH 0.04909 IN. | | STYLE DESIGNATOR | PROTRUDING HUB | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | TEETH QUANTITY | 96 | | TOOTH FORM | STANDARD |
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