4730-00-137-9693 RESTRICTOR,FLUID FLOW Index 3020-00-137-9698 GEAR ASSY,SPUR SECT

National Stock Number:
3020-00-137-9697

Federal Supply Class:
3020

National Item Identification Number:
001379697

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:
3791-50167-10195542NORTHROP GRUMMAN SYSTEMS CORPORATION


Techincal Specification:
ATTACHMENT METHODCLAMP AND INTERNAL RING GROOVE
BORE NOMINAL DIAMETER0.187 INCHES BOTH ENDS
BORE STYLEPLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH0.140 INCHES FIRST END
FACE NOMINAL WIDTH0.162 INCHES
HUB NOMINAL DIAMETER0.2495 INCHES FIRST END
HUB NOMINAL DIAMETER0.774 INCHES SECOND END
HUB STYLE DESIGNATORSPLIT FIRST END
HUB STYLE DESIGNATORPLAIN SECOND END
MATERIALALUMINUM ALLOY 2024 OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.368 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER2.750 INCHES
PITCH DIAMETER2.6656 INCHES MINIMUM AND 2.6666 INCHES MAXIMUM
PRECISION CLASSIFICATIONQUALITY NUMBER 13
PRESSURE ANGLE20.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUBS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541,TYPE 2,GRADE C,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
TEETH QUANTITY64
TOOTH FORMSTANDARD


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