Model: GR879

Helical Gear

Properties:

Body Style
Plain, solid
Pitch Diameter
4.3137 inches
Teeth Quantity
25
Bore Style
10a w/ keyway both ends
Bore Style
W/ keyway both ends
Hardness Rating
20.3 rockwell c body and 25.6 rockwell c body
Hardness Rating
46.0 rockwell c teeth and 52.0 rockwell c teeth
Outside Diameter
4.6470 inches
Nominallength
3.500 inches
Teeth Type
Double helix, solid
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
15.0000 degrees
Distance Between Body Face And Protruding Hub End
1.160 inches first end
Face Width
3.716 inches
Bore Diameter
2.500 inches both ends
Keyway Width
0.502 inches both ends
Distance From Bore Center To Keyway Bottom
1.482 inches both ends
Hub Style Designator
Plain first end
Hub Diameter
3.750 inches first end
Material
Steel comp 4140
Material Specification
66 federal standard single material response and aisi/sae 4140 assn standard single material response
Style Designator
Protruding hub
NSN
3020-00-275-8020
Part Number
GR879
Description
Gear,helical
CAGE
77873

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 GR879 NSN 3020-00-275-8020

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
LCL:
60.0
WCC:
593
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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