3020-01-251-5885 GEAR,HELICAL Index 3020-01-251-5887 GEAR,INTERNAL

National Stock Number:
3020-01-251-5886

Federal Supply Class:
3020

National Item Identification Number:
012515886

Description:
GEAR,HELICAL

Detail:
A GEAR, CYLINDRICAL IN FORM, WITH TEETH ON THE OUTER SURFACE AT AN ANGLE TO THE AXIS OF THE GEAR. SEE ALSO GEAR, ANTIBACKLASH, HELICAL:


Manufacturer Information:
521020453711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
BODY STYLEPLAIN, SOLID
BORE STYLEW/ KEYWAY BOTH ENDS
BORE NOMINAL DIAMETER4.251 INCHES BOTH ENDS
FACE NOMINAL WIDTH4.800 INCHES
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HELIX ANGLE18.9966 DEGREES
HUB NOMINAL DIAMETER6.500 INCHES BOTH ENDS
HUB STYLE DESIGNATORPLAIN BOTH ENDS
KEYWAY NOMINAL WIDTH1.001 INCHES BOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OR FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 4340 OVERALL
NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM2.592 INCHES BOTH ENDS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.800 INCHES BOTH ENDS
NOMINAL OUTSIDE DIAMETER9.998 INCHES
PITCH DIAMETER9.5000 INCHES NOMINAL
PRESSURE ANGLE25.0000 DEGREES
STYLE DESIGNATORPROTRUDING HUBS
TEETH QUANTITY36
TEETH TYPESINGLE HELIX
TOOTH FORMSTANDARD
TOOTH DIRECTIONLEFT


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