Product features
For use with 80-2 chain, 1″ pitch for driver or driven sprocket applications
Double type B sprocket provides a stable and protected attachment to the shaft, and will be modified to suit a multitude of applications requiring two chains
Shaft diameter choices range from 1 to 1-1/2″ for a variety of applications
Varying numbers of teeth and pitch size sizes offer application flexibility
High carbon steel for strength and durability
Product description
The Martin dual, also called a duplex, type B sprocket is suitable for use with the series 80-2 chain with 1” pitch for driver or driven sprocket applications. Varying amounts of teeth and pitch diameters offer application flexibility. Created from high carbon steel, it has high strength and durability. Multiple chain capability allows for more power at higher operational speeds with better load capacity.

Type B sprockets have a hub extension using one side to supply stability, and allow for the use of full-depth keyways and regular setscrews to attach the sprocket. They are able to also accommodate a wide range of shafts. The double design accepts two chains side-by-side.

The options because of this class of sprocket are: number of teeth from 10 to 95; outside diameter from 3.680 to 30.830”; stock bore size from 1 to 1-1/2”; optimum bore size from 1-1/2 to 4”; hub diameter from 2-9/16 to 6”; length through bore from 2-3/4 to 4-1/4”; and approximate weight from 3.6 to 165 lb. The face width (not including the hub) is 1.710”. The chain row thickness is 0.557” nominal. Hubs with a diameter size of 2-9/16” have a recessed groove for chain clearance. Maximum bores will accommodate standard keyseat and setscrew over keyseat. Slightly bigger bores are possible with no keyseat, shallow keyseat, or setscrew at position to keyseat. All Martin sprockets meet up with or exceed ANSI requirements.

A sprocket is a wheel with tooth around the perimeter that meshes with a chain, track, or additional perforated or indented materials. Unlike gears that mesh with another gear, sprockets mesh with a chain, which in turn interacts with another sprocket. Gears can be utilized to transmit power around a part, based on how they fit with each other. Sprockets with chains just work in directly lines. Some common advantages 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 typical bicycle, which has a sprocket and a chain to deliver power from the rider’s legs to the tires making the bike move.

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