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National Stock Number:
3020-00-967-9388
Federal Supply Class:
3020
National Item Identification Number:
009679388
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:
| 10049161 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| MATERIAL | ALUMINUM ALLOY 2024 FIRST GEAR | | STEEL COMP 303 HUB | | ALUMINUM ALLOY 2024 SECOND GEAR | | STEEL CORROSION RESISTING SPRING | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR | | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB | | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR | | SURFACE TREATMENT | ANODIZE FIRST GEAR | | PASSIVATE HUB | | ANODIZE SECOND GEAR | | TEETH QUANTITY | 120 | | TOOTH FORM | STANDARD | | PRESSURE ANGLE | 20.0000 DEGREES | | PRECISION CLASSIFICATION | QUALITY NUMBER 10 | | STYLE DESIGNATOR | PROTRUDING HUB | | PITCH DIAMETER | 1.2500 INCHES NOMINAL | | NOMINAL OUTSIDE DIAMETER | 1.271 INCHES | | FACE NOMINAL WIDTH | 0.104 INCHES | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.239 INCHES FIRST END | | BORE STYLE | PLAIN BOTH ENDS | | BORE NOMINAL DIAMETER | 0.187 INCHES BOTH ENDS | | HUB STYLE DESIGNATOR | SPLIT FIRST END | | HUB NOMINAL DIAMETER | 0.250 INCHES FIRST END | | CLAMPING SURFACE NOMINAL LENGTH | 0.203 INCHES FIRST END | | ATTACHMENT METHOD | CLAMP |
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