Model: GD121

Helical Gear

Properties:

Body Style
Webbed, offset, solid
Attachment Method
Mounting hole
Pitch Diameter
2.5000 inches
Teeth Quantity
24
Bore Style
10a w/ keyway both ends
Mounting Hole Thread Series Designator
Unc axially through body, first end
Mounting Hole Thread Size
0.312 inches axially through body, first end
Mounting Hole Type And Quantity
2 threaded axially through body, first end
Outside Diameter
2.734 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
18.7667 degrees
Distance Between Body Face And Protruding Hub End
0.009 inches first end
Body Recess Depth
0.031 inches second end
Face Width
0.641 inches
Bore Diameter
0.625 inches both ends
Keyway Width
0.156 inches both ends
Distance From Bore Center To Keyway Bottom
0.390 inches both ends
Hub Style Designator
Plain first end
Hub Diameter
0.875 inches first end
Bolt Hole Circle Diameter
1.688 inches axially through body, first end
Material
Steel comp 8620h
Material Specification
66, aisi/sae 8620h federal standard single material response
Style Designator
Protruding hub, recessed body
NSN
3020-00-841-1251
Part Number
GD121
Description
Gear,helical
CAGE
66289

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 GD121 NSN 3020-00-841-1251

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:
SX
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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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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