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Spur Antibacklash Gear NSN 3020-00-042-3946

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 3020-00-042-3946 NSN: 3020-00-042-3946

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Features and Characteristics

Attachment Method
Mounting hole
Pitch Diameter
1.5625 inches
Teeth Quantity
150
Bore Style
Plain both ends
Mounting Hole Thread Series Designator
Unc transversely through hub, first end
Mounting Hole Thread Size
0.112 inches transversely through hub, first end
Mounting Hole Type And Quantity
1 threaded transversely through hub, first end
Outside Diameter
1.581 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.200 inches first end
Face Width
0.125 inches
Bore Diameter
0.187 inches both ends
Hub Style Designator
Pinned first end
Hub Diameter
0.375 inches first end
Precision Classification
Quality number 12
Material
Aluminum alloy
Material Specification
52s-h32, aeroflex laboratories mfr ref single material response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 1 military specification single treatment response
Style Designator
Protruding hub
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
000423946
NSN
3020000423946

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
L310014090
Cage Code:
36090
Status:
A
MSDS:
Part Number:
1340063-150
Cage Code:
10001
Status:
A
MSDS:
Part Number:
1340063
Cage Code:
10001
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 3020-00-042-3946
What are the manufacturers of nsn 3020000423946?
Does this nsn 3020000423946 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020000423946
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 3020000423946 contain any precious metals?
Precious metal content is unknown.
Does nsn 3020000423946 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020000423946?
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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