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Spur Antibacklash Gear NSN 3020-01-260-2121

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 3020-01-260-2121 NSN: 3020-01-260-2121

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Features and Characteristics

Attachment Method
Setscrews
Pitch Diameter
2.2917 inches
Teeth Quantity
110
Bore Style
Plain both ends
Outside Diameter
2.333 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.281 inches first end
Face Width
0.104 inches
Bore Diameter
0.249 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.500 inches first end
Material
Steel comp 303
Material Specification
Mil-s-7720, comp 303s military specification single material response
Surface Treatment
Passivate
Surface Treatment Specification
Mil-f-14072 finish e300 military specification single treatment response
Style Designator
Protruding hub
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
012602121
NSN
3020012602121

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
990-0909
Cage Code:
13499
Status:
A
MSDS:
Part Number:
P7-1-110
Cage Code:
00141
Status:
A
MSDS:
Part Number:
990-0909-070
Cage Code:
13499
Status:
A
MSDS:
Part Number:
AP48K-110
Cage Code:
29440
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 3020-01-260-2121
What are the manufacturers of nsn 3020012602121?
Does this nsn 3020012602121 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020012602121
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 3020012602121 contain any precious metals?
No precious metal content.
Does nsn 3020012602121 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020012602121?
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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