Model: 1639C74

Gear Cluster

Properties:

Design Type
Helical first gear
Design Type
Spur second gear
Construction
Solid
Hardness Rating
30.0 rockwell c and 35.0 rockwell c
Outside Diameter
1.4370 inches first gear
Outside Diameter
0.374 inches second gear
Nominallength
2.938 inches
Hub Length
0.250 inches second end
Hub Length
0.6930 inches first end
Hub Length
1.057 inches between first and second gear
Hub Style Designator
Plain first end
Hub Style Designator
Plain second end
Hub Diameter
0.250 inches both ends
Material
Steel
Material Specification
Mil-s-5626 military specification single material response
NSN
3020-00-509-4766
Part Number
1639C74
Description
Gear Cluster
CAGE
3X894

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 1639C74 NSN 3020-00-509-4766

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
121870
UFC:
64910
LTL:
77.5
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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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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