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Spur Antibacklash Gear NSN 3020-00-278-8191

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 3020-00-278-8191 NSN: 3020-00-278-8191

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Features and Characteristics

Attachment Method
Clamp
Pitch Diameter
1.1250 inches
Teeth Quantity
108
Outside Diameter
1.136 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.033 inches second end
Face Width
0.062 inches
Hub Style Designator
Split first end
Hub Diameter
0.186 inches first end
Precision Classification
Quality number 9
Material
Steel hub
Material Specification
Qq-a-355, cond t3 federal specification single material response body
Surface Treatment
Passivate hub
Surface Treatment Specification
Mil-f-14072 e300 military specification single treatment response hub
Style Designator
Protruding hubs
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
002788191
NSN
3020002788191

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
62-0019
Cage Code:
81413
Status:
A
MSDS:
Part Number:
179676-000
Cage Code:
81413
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 3020-00-278-8191
What are the manufacturers of nsn 3020002788191?
Does this nsn 3020002788191 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020002788191
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 3020002788191 contain any precious metals?
Precious metal content is unknown.
Does nsn 3020002788191 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020002788191?
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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