Spur Antibacklash Gear NSN 3020-00-439-8326

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: 3020-00-439-8326

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Features and Characteristics

Pitch Diameter

2.6250 inches

Teeth Quantity

Bore Style

Plain both ends

Outside Diameter

2.7040 inches

Tooth Form

Standard

Pressure Angle

14.5000 degrees

Distance Between Body Face And Protruding Hub End

1.438 inches first end0.132 inches second end

Face Width

0.750 inches

Bore Diameter

0.688 inches both ends

Hub Style Designator

2 grooves first end

Hub Diameter

1.561 inches second end

First Groove Width

0.080 inches second end

First Groove Diameter

1.490 inches second end

Distance From End To First Groove

0.125 inches first end

Second Groove Width

0.058 inches first end

Second Groove Diameter

1.310 inches first end

Distance From End To Second Groove

0.297 inches first end

Material

Stainless steel hub

Material Specification

Qq-s-763, cl 6 federal specification single material response hub

Surface Treatment

Passivate hub

Style Designator

Protruding hubs

FSC

3020 Transmission Chain Sprockets Pulleys Gears

NIIN

004398326

NSN

3020004398326

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

9142983

Cage Code:

18876

Status:

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 3020-00-439-8326

What are the manufacturers of nsn 3020004398326?

U S Army Aviation And Missile (18876)

Does this nsn 3020004398326 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 3020004398326
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 3020004398326 contain any precious metals?
Precious metal content is unknown.

Does nsn 3020004398326 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 3020004398326?
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:

Cond. Code:

Status:

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