Model: 77923

Helical Gear

Special Features:

One mtg hole on tops keyway, one mtg hole 180 dep apart

Properties:

Body Style
Plain, solid
Attachment Method
Mounting hole
Pitch Diameter
4.9520 inches
Teeth Quantity
39
Bore Style
10a w/ keyway both ends
Bore Style
W/ keyway both ends
Mounting Hole Thread Series Designator
Unc axially through body, first end
Hardness Rating
32.0 rockwell c
Mounting Hole Thread Size
0.250 inches axially through body, first end
Mounting Hole Type And Quantity
2 threaded axially through body, first end
Outside Diameter
5.1995 inches
Teeth Type
Single helix
Tooth Form
Standard
Tooth Direction
Left
Pressure Angle
20.0000 degrees
Helix Angle
10.1500 degrees
Distance Between Body Face And Protruding Hub End
2.313 inches first end
Face Width
1.000 inches
Bore Diameter
1.751 inches first end
Keyway Width
0.376 inches first end
Distance From Bore Center To Keyway Bottom
1.048 inches first end
Hub Style Designator
2 steps first end
End Length
0.750 inches first end
End Diameter
2.372 inches first end
First Step Length
0.923 inches first end
First Step Diameter
2.363 inches first end
Second Step Length
0.640 inches first end
Second Step Diameter
2.750 inches first end
Bolt Hole Circle Diameter
3.500 inches axially through body, first end
Material
Steel comp 4140
Style Designator
Protruding hub
NSN
3020-00-347-9380
Part Number
77923
Description
Gear,helical
CAGE
86768

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 77923 NSN 3020-00-347-9380

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:
--
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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