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Spur Antibacklash Gear NSN 3020-01-256-5377

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 3020-01-256-5377 NSN: 3020-01-256-5377

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Features and Characteristics

Pitch Diameter
Between 0.7768 inches and 0.7778 inches
Teeth Quantity
56
Bore Style
Plain both ends
Outside Diameter
0.805 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.221 inches first end
Face Width
0.104 inches
Bore Diameter
0.250 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.437 inches first end
Precision Classification
Quality number 12
Material
Steel comp 302 spring
Material Specification
Qq-w-423 federal specification single material response spring
Surface Treatment
Passivate hub
Surface Treatment Specification
Qq-p-416, type ii, class 2 federal specification single treatment response spring
Style Designator
Protruding hub
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
012565377
NSN
3020012565377

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
Z6G-56R
Cage Code:
00328
Status:
A
MSDS:
Part Number:
PABP54-56Q12
Cage Code:
23266
Status:
A
MSDS:
Part Number:
807551-1056
Cage Code:
96214
Status:
A
MSDS:
Part Number:
807551
Cage Code:
96214
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 3020-01-256-5377
What are the manufacturers of nsn 3020012565377?
Does this nsn 3020012565377 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020012565377
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 3020012565377 contain any precious metals?
No precious metal content.
Does nsn 3020012565377 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020012565377?
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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