Model: 1856485

Spur Antibacklash Gear

Properties:

Pitch Diameter
3.0000 inches
Teeth Quantity
144
Bore Style
Plain both ends
Outside Diameter
3.040 inches
Nominallength
0.435 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.310 inches first end
Face Width
0.125 inches
Bore Diameter
0.187 inches both ends
Hub Style Designator
1 step first end
End Length
0.093 inches first end
End Diameter
0.375 inches first end
First Step Length
0.213 inches first end
First Step Diameter
0.562 inches first end
Second Step Diameter
0.875 inches first end
Third Step Diameter
0.060 inches first end
Material
Aluminum body
Material
Steel hub
Surface Treatment
Anodize body
Surface Treatment
Passivate hub
Surface Treatment Specification
Mil-a-8625, type 2, class 1 military specification single treatment response body
Style Designator
Protruding hub
NSN
3020-01-045-8843
Part Number
1856485
Description
Gear,antibacklash,spur
CAGE
03956

An item having one fixed gear and one free gear, both having the same complement of spur gear teeth, mounted on a common hub. The free gear is attached to the fixed gear by springs and operates as one gear. Upon installation with the mating gear, the teeth of the free moving gear are preset to mesh with teeth other than those of the fixed gear. This spring tension between the fixed gear and the free gear eliminates any free motion between the driver and the driven gear. The gear is used where identical and accurate transmitted motion between gears is required.

Part 1856485 NSN 3020-01-045-8843

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
26668
FIIG:
A27300
Concept No.:
App. Key:
AC
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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