3020-01-319-0814, GEAR,ANTIBACKLASH,SPUR

2520-01-319-0815 COOLER,FLUID,TRANSMISSION

National Stock Number:
3020-01-319-0814

Federal Supply Class:
3020

National Item Identification Number:
013190814

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:

1808913	03956	NORTHROP GRUMMAN SYSTEMS CORPORATION
1808913-2	03956	NORTHROP GRUMMAN SYSTEMS CORPORATION
AB250-112/CT/.1873/P2	01351	SOUTHERN GEAR & MACHINE INC
1977616	03956	NORTHROP GRUMMAN SYSTEMS CORPORATION
1977616 ITEM 13	03956	NORTHROP GRUMMAN SYSTEMS CORPORATION
AC64V-112	29440	W. M. BERG INC

Techincal Specification:

BORE STYLE	PLAIN BOTH ENDS
BORE NOMINAL DIAMETER	0.1873 INCHES BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH	0.250 INCHES FIRST END
FACE NOMINAL WIDTH	0.104 INCHES
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A581,COND A ASSN STD SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE SPRING
HUB NOMINAL DIAMETER	0.250 INCHES FIRST END
HUB STYLE DESIGNATOR	SPLIT FIRST END
III MATERIAL	ALUMINUM ALLOY 2024 BODY
III MATERIAL	STEEL COMP 302 SPRING
III MATERIAL	STEEL COMP 303 HUB
PITCH DIAMETER	1.7500 INCHES NOMINAL
PRECISION CLASSIFICATION	QUALITY NUMBER 12
PRESSURE ANGLE	20.0000 DEGREES
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.281 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER	1.781 INCHES
STYLE DESIGNATOR	PROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING
SURFACE TREATMENT	ANODIZE BODY
SURFACE TREATMENT	PASSIVATE HUB
SURFACE TREATMENT	PASSIVATE SPRING
TEETH QUANTITY	112

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