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Industrial & Scientific > Power Transmission Products > Roller Chain Sprockets > B00452TOHO
  1. Martin Roller Chain Sprocket, Reboreable, Type A Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type A Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type A Hub, Single Strand, 25 Chain Size, 0.25
    Martin Roller Chain Sprocket, Reboreable, Type A 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 A Hub, Single Strand, 25 Chain Size, 0.25" Pitch, 40 Teeth, 0.5" Bore Dia., 3.327" OD, 0.11" Width

    Delivery: 10-20 Working Days
    Customer Ratings (6 reviews)
    Price R523.00


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 A sprocket offers flexibility in mounting arrangements
  • Shaft diameter size from 1/4" to 1/2" for a variety of applications
  • Can be used with large-diameter shafts, and drilled for mounting or welded directly to other apparatuses
  • High carbon steel for strength and durability
Additional Information

The Martin type A sprocket is suitable for use with the series 25 chain with 1/4” pitch for driver or driven sprocket applications. This sprocket has a narrow profile and no hub extension, and is easily adaptable for bushings, bearings, and sleeves. Varying numbers of teeth, outside diameters and stock bore sizes offer application flexibility. Made from high carbon steel, it has high strength and durability.

The options for this class of sprocket are: number of teeth from 18 to 72; outside diameter from 1.568” to 5.876”; stock bore size from 1/4” to 1/2”; and approximate weight from 0.04 lbs. to 0.74 lbs. The tooth width is 0.110” nominal. The maximum bore size will accommodate standard keyseat and setscrew over keyseat. 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 ANSI, NAS and DIN standards.

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Most Helpful Customer Reviews

Great Quality Steel Sprocket. I also purchased a #25 roller chain and the two items meshed very well. The other dimensions were within tolerances described.
Awesome price for seriously good sprockets. Perfect for my need.
Please Note

The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.

Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!

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Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.