3020-01-425-8212, GEAR,ANTIBACKLASH,SPUR

National Stock Number:
3020-01-425-8212

Federal Supply Class:
3020

National Item Identification Number:
014258212

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:

12373389	01365	MARINE CORPS LOGISTICS COMMAND TECHNICAL DATA REPOSITORY CUSTOMER SERVICE-MICC LOGISTICS OPERATIONS CENTER
12373389	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
12373389-2	01365	MARINE CORPS LOGISTICS COMMAND TECHNICAL DATA REPOSITORY CUSTOMER SERVICE-MICC LOGISTICS OPERATIONS CENTER
12373389-2	05606	GENERAL DYNAMICS-OTS, INC.
12373389-2	0C9L5	GENERAL DYNAMICS LAND SYSTEMS CUSTOMER SERVICE & SUPPORT COMPANY
12373389-2	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
S9706A-Z7D84R	00328	DESIGNATRONICS INCORPORATED

Techincal Specification:

MATERIAL	STEEL COMP 303 FIRST GEAR
	STEEL COMP 303 HUB
	STEEL COMP 303 SECOND GEAR
	STEEL COMP 302 SPRING
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE FIRST GEAR
	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE HUB
	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR
	ASTM-A313 ASSN STD SINGLE MATERIAL RESPONSE SPRING
SURFACE TREATMENT	PASSIVATE FIRST GEAR
	PASSIVATE HUB
	PASSIVATE SECOND GEAR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE FIRST GEAR
	MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE HUB
	MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE SECOND GEAR
TEETH QUANTITY	84
PRESSURE ANGLE	20.0000 DEGREES
PRECISION CLASSIFICATION	ACCURACY GRADE 12
STYLE DESIGNATOR	PROTRUDING HUB
PITCH DIAMETER	1.7500 INCHES NOMINAL
NOMINAL OUTSIDE DIAMETER	1.790 INCHES
FACE NOMINAL WIDTH	0.104 INCHES
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.221 INCHES SECOND END
BORE STYLE	PLAIN BOTH ENDS
BORE NOMINAL DIAMETER	0.250 INCHES BOTH ENDS
HUB STYLE DESIGNATOR	SPLIT SECOND END
HUB NOMINAL DIAMETER	0.310 INCHES SECOND END
CLAMPING SURFACE NOMINAL LENGTH	0.221 INCHES SECOND END
ATTACHMENT METHOD	SLOT

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