Model: 409716-20

Spur Antibacklash Gear

Properties:

Attachment Method
Clamp
Pitch Diameter
Between 1.3323 inches and 1.3333 inches
Teeth Quantity
64
Nominallength
0.437 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.312 inches first end
Face Width
0.125 inches
Bore Diameter
0.241 inches both ends
Hub Diameter
0.313 inches first end
Clamping Surface Length
0.250 inches first end
Material
Aluminum alloy 2024 body
Material
Steel comp 303 hub
Material Specification
Qq-a-225/6 federal specification single material response body
Material Specification
Qq-s-764, type 303, cond a federal specification single material response hub
Surface Treatment
Anodize body
Surface Treatment
Passivate hub
Surface Treatment Specification
Mil-a-8625 military specification single treatment response body
Surface Treatment Specification
Mil-f-14072, finish e300 military specification single treatment response hub
Style Designator
Protruding hub
NSN
3020-00-482-8522
Part Number
409716-20
Description
Gear,antibacklash,spur
CAGE
80020

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 409716-20 NSN 3020-00-482-8522

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:
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:
Trailers/Vehicles

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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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