3020-00-563-3826, GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-00-563-3826

Federal Supply Class:
3020

National Item Identification Number:
005633826

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:

8171711

18876

U S ARMY AVIATION AND MISSILE COMMAND

Techincal Specification:

MATERIAL	ALUMINUM ALLOY FIRST GEAR
	STEEL CORROSION RESISTING HUB
	ALUMINUM ALLOY SECOND GEAR
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR
	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE HUB
	QQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR
TEETH QUANTITY	35
TOOTH FORM	STANDARD
PRESSURE ANGLE	14.5000 DEGREES
STYLE DESIGNATOR	PROTRUDING HUB
PITCH DIAMETER	7.3125 INCHES NOMINAL
NOMINAL OUTSIDE DIAMETER	7.353 INCHES
FACE NOMINAL WIDTH	0.376 INCHES
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	3.344 INCHES FIRST END
BORE STYLE	PLAIN BOTH ENDS
BORE NOMINAL DIAMETER	0.500 INCHES BOTH ENDS
HUB STYLE DESIGNATOR	PLAIN FIRST END
HUB NOMINAL DIAMETER	0.500 INCHES FIRST END
FURNISHED ITEMS AND QUANTITY	1 SPRING PIN AND
	2 SPRING
SPECIAL FEATURES	TWO SHOULDER SCREWS INCLUDED

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