Spur Antibacklash Gear NSN 3020-01-085-2891

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: 3020-01-085-2891

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Features and Characteristics

Attachment Method

Mounting hole

Pitch Diameter

2.0630 inches

Teeth Quantity

130

Bore Style

Plain both ends

Mounting Hole Type And Quantity

2 plain transversely through face

Outside Diameter

2.0312 inches

Nominallength

0.385 inches

Tooth Form

Stub

Pressure Angle

20.0000 degrees

Distance Between Body Face And Protruding Hub End

0.160 inches first end

Face Width

0.104 inches

Bore Diameter

0.120 inches both ends

Hub Style Designator

Split first end

Hub Diameter

0.188 inches first end

Clamping Surface Length

0.188 inches first end

Precision Classification

Quality number 12

Mounting Hole Diameter

0.032 inches transversely through face

Material

Steel comp 303 hub and aluminum alloy 2024 hub

Material Specification

Qq-s-763, cl 303 federal specification 1st material response hub and qq-a-250/4 federal specification 2nd material response hub

Surface Treatment

Passivate hub

Surface Treatment Specification

171, finish no. 5.4.1 military standard single treatment response hub

Style Designator

Protruding hub

FSC

3020 Transmission Chain Sprockets Pulleys Gears

NIIN

010852891

NSN

3020010852891

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

577R646H14

Cage Code:

97942

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 3020-01-085-2891

What are the manufacturers of nsn 3020010852891?

Northrop Grumman Systems Corporation (97942)

Does this nsn 3020010852891 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 3020010852891
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 3020010852891 contain any precious metals?
No precious metal content.

Does nsn 3020010852891 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 3020010852891?
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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Quality Inspected Parts
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