Product features
For use with 80-2 chain, 1″ pitch for driver or driven sprocket applications
Dual type B sprocket offers a stable and secure attachment to the shaft, and can be modified to suit a wide variety of applications requiring two chains
Shaft diameter choices range from 1 to 1-1/2″ for a number of applications
chain sprocket Varying numbers of teeth and pitch size sizes offer application flexibility
High carbon steel for durability and strength
Product description
The Martin dual, also referred to as a duplex, type B sprocket is ideal for use with the series 80-2 chain with 1” pitch for driver or driven sprocket applications. Varying amounts of the 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 higher load capacity.
Type B sprockets possess a hub extension using one side to provide stability, and allow for the use of full-depth keyways and regular setscrews to add the sprocket. They can also accommodate a wide variety of shafts. The double style accepts two chains side-by-side.
The options for this class of sprocket are: number of teeth from 10 to 95; outside diameter from 3.680 to 30.830”; share 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”; size through bore from 2-3/4 to 4-1/4”; and approximate weight from 3.6 to 165 lb. The face width (excluding the hub) is 1.710”. The chain row thickness is certainly 0.557” nominal. Hubs with a diameter size of 2-9/16” possess a recessed groove for chain clearance. Maximum bores will accommodate regular keyseat and setscrew 
over keyseat. Slightly bigger bores are possible without keyseat, shallow keyseat, or setscrew at angle to keyseat. All Martin sprockets meet up with or exceed ANSI specifications.
A sprocket is a wheel with the teeth around the perimeter that meshes with a chain, track, or various other perforated or indented material. Unlike gears that mesh with another equipment, sprockets mesh with a chain, which then interacts with another sprocket. Gears can be utilized to transmit power around a corner, based on how they fit together. Sprockets with chains just work in straight lines. Some common benefits of chain-drive systems consist of 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, that includes a sprocket and a chain to deliver power from the rider’s legs to the wheels producing the bike move.
Martin Sprocket & Equipment manufactures power tranny and conveying items. The business was founded in 1951 and can be headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), National Aerospace Regular (NAS), and Deutsches Institut für Normung (DIN) standards.