Model: 1801174-144

Spur Antibacklash Gear

Special Features:

Hole location hub between hub end and gear face 90 degrees apart; mounting hole nom diameter 0.063 in., type plain qty1 and threaded q type 1, thread series designator unc, nom thread size 0.112 in., thread qty per in. 40

Properties:

Attachment Method
Mounting hole
Pitch Diameter
3.0000 inches
Teeth Quantity
144
Bore Style
Plain both ends
Outside Diameter
3.0417 inches
Nominallength
0.375 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.250 inches first end
Face Width
0.125 inches
Bore Diameter
0.250 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.563 inches first end
Material
Steel hub
Material Specification
Mil-s-7720, comp 303 military specification single material response hub
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 1 military specification single treatment response
Style Designator
Protruding hub
NSN
3020-00-455-9289
Part Number
1801174-144
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 1801174-144 NSN 3020-00-455-9289

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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