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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:
| ATTACHMENT METHOD | CLAMP | | BORE NOMINAL DIAMETER | 0.187 INCHES BOTH ENDS | | BORE STYLE | PLAIN BOTH ENDS | | CLAMPING SURFACE NOMINAL LENGTH | 0.203 INCHES FIRST END | | FACE NOMINAL WIDTH | 0.104 INCHES | | HUB NOMINAL DIAMETER | 0.250 INCHES FIRST END | | HUB STYLE DESIGNATOR | SPLIT FIRST END | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB | | MATERIAL | ALUMINUM ALLOY 2024 FIRST GEAR | | MATERIAL | ALUMINUM ALLOY 2024 SECOND GEAR | | MATERIAL | STEEL COMP 303 HUB | | MATERIAL | STEEL CORROSION RESISTING SPRING | | NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.239 INCHES FIRST END | | NOMINAL OUTSIDE DIAMETER | 1.271 INCHES | | PITCH DIAMETER | 1.2500 INCHES NOMINAL | | PRECISION CLASSIFICATION | QUALITY NUMBER 10 | | PRESSURE ANGLE | 20.0000 DEGREES | | STYLE DESIGNATOR | PROTRUDING HUB | | SURFACE TREATMENT | ANODIZE FIRST GEAR | | SURFACE TREATMENT | ANODIZE SECOND GEAR | | SURFACE TREATMENT | PASSIVATE HUB | | TEETH QUANTITY | 120 | | TOOTH FORM | STANDARD |
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