Model: 179792-000

Spur Antibacklash Gear

Properties:

Attachment Method
Mounting hole
Pitch Diameter
0.8125 inches
Teeth Quantity
52
Bore Style
Plain both ends
Mounting Hole Type And Quantity
3 countersunk axially through body, second end
Outside Diameter
0.843 inches
Tooth Form
Stub
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.020 inches first end
Face Width
0.119 inches
Bore Diameter
0.2194 inches both ends
Hub Style Designator
Plain first end
Hub Diameter
0.750 inches first end
Precision Classification
Quality number 9
Mounting Hole Diameter
0.070 inches axially through body, second end
Bolt Hole Circle Diameter
0.172 inches axially through body, second end
Material
Aluminum alloy 2024 body
Material
Steel comp 303 hub or steel comp 303s hub
Material
Steel comp 303 or steel comp 303s hub
Material Specification
66, sae 30303 federal standard single material response hub or mil-s-7720, cond a military specification single material response hub
Material Specification
Qq-a-225/6, t4 federal specification single material response body
Surface Treatment
Passivate hub
Surface Treatment Specification
Mil-c-5541 military specification single treatment response body
Surface Treatment Specification
Mil-c-5541 military specification single treatment response teeth
Surface Treatment Specification
Mil-f-14072, finish 300 military specification single treatment response hub
Style Designator
Protruding hub
NSN
3020-00-278-5152
Part Number
179792-000
Description
Gear,antibacklash,spur
CAGE
81413

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 179792-000 NSN 3020-00-278-5152

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
197339
UFC:
96710
LTL:
65.0
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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