3020-01-273-2720 GEAR,HELICAL Index 3020-01-273-2722 GEAR,SPUR

National Stock Number:
3020-01-273-2721

Federal Supply Class:
3020

National Item Identification Number:
012732721

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:
484749480064NAVAL SHIP SYSTEMS COMMAND


Techincal Specification:
BODY STYLESPOKED
BORE NOMINAL DIAMETER3.500 INCHES BOTH ENDS
BORE STYLEW/ 2 KEYWAYS BOTH ENDS
FACE NOMINAL WIDTH3.500 INCHES
HELIX ANGLE15.0000 DEGREES
HUB NOMINAL DIAMETER5.500 INCHES FIRST END
HUB STYLE DESIGNATORPLAIN FIRST END
KEYWAY NOMINAL WIDTH0.754 INCHES BOTH ENDS
MATERIALSTEEL COMP 4140 OR STEEL COMP 4340 OVERALL
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.750 INCHES FIRST END
NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM2.092 INCHES BOTH ENDS
NOMINAL OUTSIDE DIAMETER24.423 INCHES
PITCH DIAMETER24.1564 INCHES NOMINAL
PRESSURE ANGLE20.0000 DEGREES
SPECIAL FEATURESKEYWAYS SPACED 90 DEG APART
STYLE DESIGNATORPROTRUDING HUB
TEETH TYPESINGLE HELIX
TEETH QUANTITY140
TOOTH DIRECTIONLEFT
TOOTH FORMSTANDARD


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