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Spur Antibacklash Gear NSN 3020-01-070-0639

Item Description

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.

NSN 3020-01-070-0639 NSN: 3020-01-070-0639

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Features and Characteristics

Attachment Method
Clamp
Pitch Diameter
0.7500 inches
Teeth Quantity
72
Outside Diameter
0.7698 inches
Nominallength
0.395 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.062 inches second end
Face Width
0.108 inches
Bore Diameter
0.125 inches both ends
Material
Stainless steel
Surface Treatment
Passivate
Surface Treatment Specification
Mil-std-171, finish no. 5.4.1 military specification single treatment response
Style Designator
Peripheral face, hubless
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
010700639
NSN
3020010700639

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
AGA0731
Cage Code:
01351
Status:
A
MSDS:
Part Number:
9713-195
Cage Code:
12444
Status:
A
MSDS:
Part Number:
97310032-4
Cage Code:
53712
Status:
A
MSDS:
Part Number:
901055-4C
Cage Code:
82577
Status:
A
MSDS:
Part Number:
901055
Cage Code:
82577
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8483409000
  • NAICS: 333612
  • SITC: 74840
  • Description: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 3020-01-070-0639
What are the manufacturers of nsn 3020010700639?
Does this nsn 3020010700639 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020010700639
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.
Does nsn 3020010700639 contain any precious metals?
No precious metal content.
Does nsn 3020010700639 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020010700639?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
26668
FIIG:
A27300
App. Key:
AC
Cond. Code:
1
Status:
A

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