Model: A8977

Gear Cluster

Properties:

Bore Style
Plain both ends
Design Type
Helical second gear
Design Type
Helical third gear
Design Type
Helical first gear
Design Type
Spur fourth gear
Construction
Solid
Outside Diameter
2.165 inches sixth gear
Outside Diameter
2.813 inches fifth gear
Outside Diameter
3.385 inches fourth gear
Nominallength
5.488 inches
Hub Length
0.203 inches between second and third gear
Hub Length
0.812 inches between third and fourth gear
Hub Length
1.875 inches between first and second gear
Bore Diameter
0.762 inches both ends
Hub Diameter
0.775 inches between first and second gear
Hub Diameter
1.094 inches between third and fourth gear
Material
Steel comp 4027 or steel comp 8620 or steel comp 8720 or steel comp 4161
Material
Steel comp 4027 or steel comp 8620 or steel comp 8720 or steel comp 4161
Material Specification
66, aisi/sae 8720 federal standard single material response or sae 4027 assn standard single material response or sae 4161 assn standard single material response
NSN
3020-00-360-8150
Part Number
A8977
Description
Gear Cluster
CAGE
34623

A cylindrical item having a full 360 degree (6.282 radians) complement of teeth on two or more surfaces. It may be a one-piece casting or composed of two or more separate items firmly held together by welding, rivets, pins, or the like, to form a single unit. It is designed to mount on a shaft. For items consisting of a shaft with an integral complement(s) or gear teeth, see gearshaft (as modified). Excludes gear subassembly, speed decreaser.

Part A8977 NSN 3020-00-360-8150

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
36636
FIIG:
A270A0
Concept No.:
App. Key:
A
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

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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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