Model: 181-917

Spur Antibacklash Gear

Properties:

Pitch Diameter
0.4791 inches
Teeth Quantity
46
Bore Style
Plain both ends
Outside Diameter
0.497 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.125 inches second end
Distance Between Body Face And Protruding Hub End
0.202 inches first end
Face Width
0.092 inches
Bore Diameter
0.156 inches both ends
Hub Style Designator
1 step first end
Hub Style Designator
Pinned second end
Hub Diameter
0.312 inches second end
End Length
0.184 inches first end
Precision Classification
Quality number 10
End Diameter
0.187 inches first end
First Step Length
0.160 inches first end
First Step Diameter
0.250 inches first end
Material
Steel comp 303
Material Specification
66 federal standard single material response
Surface Treatment
Passivate
Style Designator
Protruding hubs
NSN
3020-00-937-6451
Part Number
181-917
Description
Gear,antibacklash,spur
CAGE
90073

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 181-917 NSN 3020-00-937-6451

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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