Model: 138C517

Spur Antibacklash Gear

Properties:

End Application
5840-01-020-5631, radar set
Pitch Diameter
1.7500 inches
Teeth Quantity
42
Bore Style
Plain both ends
Outside Diameter
1.833 inches
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.240 inches first end
Face Width
0.188 inches
Bore Diameter
0.250 inches both ends
Hub Style Designator
Split first end
Hub Diameter
0.312 inches first end
Material
Steel comp 303 body
Material
Steel comp 303 hub
Material
Steel comp 302 spring
Material Specification
Qq-s-764 federal specification single material response body
Material Specification
Qq-s-764 federal specification single material response hub
Material Specification
Qq-s-766 federal specification single material response spring
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35, type 2 federal specification single treatment response
Style Designator
Protruding hub
NSN
3020-01-317-5398
Part Number
138C517
Description
Gear,antibacklash,spur
CAGE
97942

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 138C517 NSN 3020-01-317-5398

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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