3020-01-316-1114 GEAR,ANTIBACKLASH,SPUR Index 4420-01-316-1116 HEATER,FLUID,INDUSTRIAL

National Stock Number:
3020-01-316-1115

Federal Supply Class:
3020

National Item Identification Number:
013161115

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:
180891303956NORTHROP GRUMMAN SYSTEMS CORPORATION
1808913-103956NORTHROP GRUMMAN SYSTEMS CORPORATION
180913-101351SOUTHERN GEAR & MACHINE INC
180913-103956NORTHROP GRUMMAN SYSTEMS CORPORATION
1977616 ITEM 1203956NORTHROP GRUMMAN SYSTEMS CORPORATION
18091303956NORTHROP GRUMMAN SYSTEMS CORPORATION
AB250-112/CT/.1251/P201351SOUTHERN GEAR & MACHINE INC
AB250-112/P201351SOUTHERN GEAR & MACHINE INC


Techincal Specification:
CLAMPING SURFACE NOMINAL LENGTH0.255 INCHES FIRST END
CRITICALITY CODE JUSTIFICATIONFEAT
FACE NOMINAL WIDTH0.125 INCHES
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A531,TY 303,COND A ASSN STD SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6-2024-T4 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6-2024-T4 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE SPRING
HUB NOMINAL DIAMETER0.188 INCHES FIRST END
HUB STYLE DESIGNATORSPLIT FIRST END
III MATERIALALUMINUM FIRST GEAR
III MATERIALALUMINUM SECOND GEAR
III MATERIALSTEEL CORROSION RESISTING HUB
III MATERIALSTEEL CORROSION RESISTING SPRING
PITCH DIAMETER1.7500 INCHES NOMINAL
PRESSURE ANGLE20.0000 DEGREES
PROPRIETARY CHARACTERISTICSPACS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.255 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER1.781 INCHES
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
STYLE DESIGNATORPROTRUDING HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE FIRST GEAR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE HUB
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING
SURFACE TREATMENTANODIZE FIRST GEAR
SURFACE TREATMENTANODIZE SECOND GEAR
SURFACE TREATMENTPASSIVATE HUB
SURFACE TREATMENTPASSIVATE SPRING
TEETH QUANTITY112
TOOTH FORMSTANDARD
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.125 INCHES BOTH ENDS


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