Model: 3B8913

Helical Gear

Special Features:

Boss over keyway 2nd end, tapped hole into each spoke boss 0.625 in. Deep, 0.250-28 unf 2b thd on 1st end for pull out

Properties:

Body Style
Spoked
Pitch Diameter
4.4330 inches
Teeth Quantity
28
Bore Style
10a w/ keyway both ends
Bore Style
W/ keyway both ends
Hardness Rating
22.8 rockwell c and 29.9 rockwell c
Outside Diameter
4.717 inches
Nominallength
1.510 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
25.5439 degrees
Distance Between Body Face And Protruding Hub End
0.133 inches second end
Distance Between Body Face And Recessed Hub End
0.197 inches first end
Face Width
1.375 inches
Bore Diameter
1.875 inches both ends
Keyway Width
0.252 inches both ends
Distance From Bore Center To Keyway Bottom
0.614 inches both ends
Hub Style Designator
Plain both ends
Hub Diameter
1.625 inches first end
Hub Diameter
1.625 inches second end
Material
Steel comp 1035
Material Specification
66 federal standard single material response and aisi/sae 1035 assn standard single material response
Style Designator
One protruding hub, one recessed hub
NSN
3020-00-363-6352
Part Number
3B8913
Description
Gear,helical
CAGE
11083

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:

Part 3B8913 NSN 3020-00-363-6352

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05464
FIIG:
A27300
Concept No.:
1
App. Key:
AF
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8483409000
  • SITC: 74840
  • End Use: Industrial machines, other
  • NAICS: 333612
  • USDA: 1

Freight Class: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately

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