3020-00-073-6643 GEAR CLUSTER Index 3020-00-073-6645 GEAR CLUSTER

National Stock Number:
3020-00-073-6644

Federal Supply Class:
3020

National Item Identification Number:
000736644

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:
185246903956NORTHROP GRUMMAN SYSTEMS CORPORATION
185246956232LOCKHEED MARTIN CORPORATION


Techincal Specification:
MATERIALALUMINUM ALLOY 2024 BODY
STEEL COMP 303 HUB
ALUMINUM ALLOY 2024 TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY
FED STD 66 FED STD SINGLE MATERIAL RESPONSE HUB
QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE TEETH
SURFACE TREATMENTANODIZE BODY
PASSIVATE HUB
ANODIZE TEETH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE TEETH
TEETH QUANTITY40
TOOTH FORMSTANDARD
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUB
PITCH DIAMETER0.6250 INCHES NOMINAL
NOMINAL OUTSIDE DIAMETER0.6562 INCHES
FACE NOMINAL WIDTH0.125 INCHES
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.250 INCHES FIRST END
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.187 INCHES BOTH ENDS
HUB STYLE DESIGNATORPINNED FIRST END
HUB NOMINAL DIAMETER0.375 INCHES FIRST END
THE MANUFACTURERS DATA
MANUFACTURERS CODE03956
DESIGN CONTROL REFERENCE1852469


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