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Spur Antibacklash Gear NSN 3020-00-918-3811

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 3020-00-918-3811 NSN: 3020-00-918-3811

Features and Characteristics

Attachment Method
Clamp
Pitch Diameter
1.8056 inches
Teeth Quantity
130
Bore Style
Plain both ends
Outside Diameter
1.833 inches
Tooth Form
Standard
Pressure Angle
20.0000 degrees
Distance Between Body Face And Protruding Hub End
0.343 inches first end
Face Width
0.078 inches
Bore Diameter
0.187 inches both ends
Hub Style Designator
Split first end
Hub Diameter
0.248 inches first end
Clamping Surface Length
0.251 inches first end
Precision Classification
Quality number 12
Material
Aluminum alloy
Surface Treatment
Anodize
Style Designator
Protruding hub
FSC
3020 Transmission Chain Sprockets Pulleys Gears
NIIN
009183811
NSN
3020009183811

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
537-102-032
Cage Code:
07421
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 3020-00-918-3811
What are the manufacturers of nsn 3020009183811?
Does this nsn 3020009183811 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 3020009183811
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 3020009183811 contain any precious metals?
No precious metal content.
Does nsn 3020009183811 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 3020009183811?
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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  •   Certificate of Conformance
  •   Quality Inspected Parts
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