Martin Roller Chain Sprocket, Reboreable, Type A Hub, Double Single Strand, 40 Chain Size, 0.5" Pitch, 15 Teeth, 0.5" Bore Dia., 2.65" OD, 1.8125" Hub Dia., 1.40625" Width

The Martin double single type A sprocket is suitable for use with two series 40 chains with 1/2” pitch for driver or driven sprocket applications. Varying numbers of teeth, pitch diameters, and stock bore sizes offer application flexibility. Made from high carbon steel, it has high strength and durability. Multiple chain capability allows for more power at higher operational speeds with greater load capacity. Type A sprockets have a narrow profile and no hub extension, and are easily adaptable for bushings, bearings, and sleeves. They can be used with large diameter shafts, drilled for mounting, or welded directly to other apparatuses. The double single style accepts two chains side-by-side. The options for this class of sprocket are: number of teeth from 15 to 25; outside diameter from 2.650 to 4.260”; pitch diameter from 2.405 to 3.989”; stock bore size from 1/2 to 5/8”; maximum bore size from 1-1/4 to 2-1/4”; length through bore of 1-13/32”; centerline to centerline of chain rows of 1-1/8”; diameter of hub between chain rows from 1-13/16 to 3-7/16”; and approximate weight from 1.20 to 4.50 lb. The face width is 1-13/32”; and the chain row thickness is 0.284” nominal. 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.

• For use with series 40 chain, 1/2” pitch for driver or driven sprocket applications
• Double single type A sprocket offers flexibility in mounting arrangements for applications that require two chains
• Shaft diameter options from 1/2” to 5/8” for a variety of applications
• Varying numbers of teeth and pitch diameter sizes offer application flexibility
• High carbon steel for strength and durability