3020-00-421-8032, GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-421-8032

Federal Supply Class:
3020

National Item Identification Number:
004218032

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:

703794-1	00141	ROLLER BEARING CO OF AMERICA, INC
703794-1	96214	RAYTHEON COMPANY

Techincal Specification:

ATTACHMENT METHOD	MOUNTING HOLE
BORE NOMINAL DIAMETER	0.187 INCHES BOTH ENDS
BORE STYLE	PLAIN BOTH ENDS
FACE NOMINAL WIDTH	0.125 INCHES
HUB NOMINAL DIAMETER	0.375 INCHES FIRST END
HUB STYLE DESIGNATOR	PLAIN FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 303 OVERALL
MOUNTING HOLE NOMINAL THREAD SIZE	0.112 INCHES TRANSVERSELY THROUGH HUB FIRST END
MOUNTING HOLE THREAD QUANTITY PER INCH	40 TRANSVERSELY THROUGH HUB FIRST END
MOUNTING HOLE THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END
MOUNTING HOLE TYPE AND QUANTITY	1 THREADED TRANSVERSELY THROUGH HUB FIRST END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.375 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER	1.000 INCHES
NOMINAL OVERALL LENGTH	0.500 INCHES
PITCH DIAMETER	0.9380 INCHES NOMINAL
PRESSURE ANGLE	20.0000 DEGREES
STYLE DESIGNATOR	PROTRUDING HUB
SURFACE TREATMENT	PASSIVATE OVERALL
TEETH QUANTITY	30
TOOTH FORM	STANDARD

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