3020-01-419-6421 GEAR CLUSTER Index 3020-01-419-6423 GEAR CLUSTER

National Stock Number:
3020-01-419-6422

Federal Supply Class:
3020

National Item Identification Number:
014196422

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.


Manufacturer Information:
3915589944ELBITAMERICA, INC.


Techincal Specification:
ATTACHMENT METHODSLOT
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.090 INCHES BOTH ENDS
FURNISHED ITEMS AND QUANTITY2 SPRING
END NOMINAL DIAMETER0.124 INCHES SECOND END
END NOMINAL LENGTH0.125 INCHES SECOND END
FACE NOMINAL WIDTH0.064 INCHES
FIRST STEP NOMINAL DIAMETER0.250 INCHES SECOND END
FIRST STEP NOMINAL LENGTH0.015 INCHES SECOND END
HUB NOMINAL DIAMETER0.156 INCHES FIRST END
HUB STYLE DESIGNATOR1 STEP SECOND END
HUB STYLE DESIGNATORPLAIN FIRST END
III MATERIALALUMINUM ALLOY 2024 FIRST GEAR
III MATERIALALUMINUM ALLOY 2024 SECOND GEAR
PITCH DIAMETER0.6250 INCHES NOMINAL
PRECISION CLASSIFICATIONACCURACY GRADE 10
PRESSURE ANGLE20.0000 DEGREES
PROPRIETARY CHARACTERISTICSPACS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.048 INCHES FIRST END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.140 INCHES SECOND END
NOMINAL OUTSIDE DIAMETER0.641 INCHES
SPECIAL FEATURESMATERIAL 2024-T3, FINISH CHEMICAL FILM TREAT
STYLE DESIGNATORPROTRUDING HUBS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM-B-449, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE FIRST GEAR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM-B-449, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE HUB
TEETH QUANTITY75


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