Model: 1856558

Gear Cluster

Properties:

Attachment Method
Mounting hole
Bore Style
Plain both ends
Design Type
Spur second gear
Design Type
Spur first gear
Construction
Assembled
Thread Size
0.112 inches both ends
Outside Diameter
0.664 inches fifth gear
Outside Diameter
3.789 inches fourth gear
Nominallength
0.6560 inches
Hub Length
0.3810 inches first end
Bore Diameter
0.250 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.5000 inches between first and second gear
Material
Aluminum alloy 2024 second gear
Material
Steel comp 303 first gear
Material Specification
Qq-a-225/6, alloy 2024, t351 federal specification single material response second gear
Material Specification
Qq-s-764, type 303 cond a federal specification single material response first gear
Surface Treatment
Anodize second gear
Surface Treatment Specification
Mil-a-8625, type 2, class 1 military specification single treatment response second gear
Surface Treatment Specification
Mil-a-8625, type 3, class 1 military specification single treatment response first gear
Thread Series Designator
Unc both ends
NSN
3020-01-046-0329
Part Number
1856558
Description
Gear Cluster
CAGE
03956

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 1856558 NSN 3020-01-046-0329

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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