Model: 30138-74

Spur Antibacklash Gear

Properties:

Attachment Method
Clamp
Pitch Diameter
0.6160 inches
Teeth Quantity
74
Bore Style
Plain both ends
Outside Diameter
0.633 inches
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.152 inches first end
Face Width
0.057 inches
Bore Diameter
0.120 inches both ends
Hub Diameter
0.187 inches first end
Material
Aluminum alloy 2024
Material Specification
11-a-225/6, t4 federal specification single material response
Style Designator
Protruding hub
NSN
3020-00-884-6235
Part Number
30138-74
Description
Gear,antibacklash,spur
CAGE
07421

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 30138-74 NSN 3020-00-884-6235

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:
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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