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Industrial & Scientific > Power Transmission Products > Roller Chain Sprockets > B0045JJNT6
  1. Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25
    Image(s) provided for illustrative purposes and may differ from the actual product
  2. Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 25 Chain Size, 0.25" Pitch, 20 Teeth, 0.25" Bore Dia., 1.729" OD, 1.281" Hub Dia., 0.11" Width

    Delivery: 10-20 Working Days
    Price R613.00

Various Product Options May Be Available!
This item may be available in a different size, colour, scent, version or platform. Click below to be directed to product options:

Product Description

  • For use with series 25 chain, 1/4" pitch for driver or driven sprocket applications
  • Type B reboreable sprocket offers a stable and secure attachment to the shaft
  • Shaft diameter size from 1/4" to 1/2" for a variety of applications
  • Varying numbers of teeth, hub sizes, pitch diameters, and stock bore sizes offer application flexibility
  • High carbon steel for strength and durability
Additional Information

The Martin type B sprocket is suitable for use with the series 25 chain with 1/4” pitch for driver or driven sprocket applications. Varying numbers of teeth, hub sizes, pitch diameters and stock bore sizes offer application flexibility. Made from high carbon steel, it has high strength and durability.

Type B sprockets have a hub extension on one side to provide stability, and allow for the use of full-depth keyways and standard setscrews to attach the sprocket. They can also accommodate a wide range of shafts.

The options for this class of sprocket are: number of teeth from 9 to 72; outside diameter from 0.837” to 5.876”; stock bore size from 1/4” to 1/2”; maximum bore size from 1/4” to 1-3/8”; hub diameter from 7/16” to 2.00”; length through bore from 1/2” to 3/4”; and approximate weight from 0.03 lbs to 1.30 lbs. The tooth width is 0.110” nominal. Maximum bores will accommodate standard keyseat and setscrew over keyseat (sold separately). Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at angle to keyseat. All Martin sprockets meet or exceed ANSI standards.

A sprocket is a wheel with teeth around the perimeter that meshes with a chain, track, or other perforated or indented material. Unlike gears that mesh with another gear, sprockets mesh with a chain, which then interacts with another sprocket. Gears can be used to transmit power around a corner, based on how they fit together. Sprockets with chains only work in straight lines. Some common benefits of chain-drive systems include minimal slippage, a fixed ratio between rotating shafts, and versatility with many different chain attachments and sprocket material selections. An example of a power transmission system is a standard bicycle, which has a sprocket and a chain to deliver power from the rider’s legs to the wheels making the bike move.

Martin Sprocket & Gear manufactures power transmission and conveying products. The company was founded in 1951 and is headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.

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