3020-01-425-8211, GEAR,ANTIBACKLASH,SPUR

4720-01-425-8210 HOSE ASSEMBLY,NONMETALLIC

National Stock Number:
3020-01-425-8211

Federal Supply Class:
3020

National Item Identification Number:
014258211

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:

12373388	01365	MARINE CORPS LOGISTICS COMMAND TECHNICAL DATA REPOSITORY CUSTOMER SERVICE-MICC LOGISTICS OPERATIONS CENTER
12373388	05606	GENERAL DYNAMICS-OTS, INC.
12373388	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
A168-2-1	26420	ASTRO GEAR AND INSTRUMENT CO INC

Techincal Specification:

ATTACHMENT METHOD	SLOT
BORE NOMINAL DIAMETER	0.187 INCHES BOTH ENDS
BORE STYLE	PLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH	0.250 INCHES SECOND END
FACE NOMINAL WIDTH	0.250 INCHES
HUB NOMINAL DIAMETER	0.248 INCHES SECOND END
HUB STYLE DESIGNATOR	SPLIT SECOND END
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM-A313 ASSN STD SINGLE MATERIAL RESPONSE SPRING
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE FIRST GEAR
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM-A582 ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR
MATERIAL	STEEL COMP 302 SPRING
MATERIAL	STEEL COMP 303 FIRST GEAR
MATERIAL	STEEL COMP 303 HUB
MATERIAL	STEEL COMP 303 SECOND GEAR
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.310 INCHES SECOND END
NOMINAL OUTSIDE DIAMETER	4.359 INCHES
PITCH DIAMETER	4.1250 INCHES NOMINAL
PRECISION CLASSIFICATION	QUALITY NUMBER 10
PRESSURE ANGLE	20.0000 DEGREES
STYLE DESIGNATOR	PROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
TEETH QUANTITY	33

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