Product features
For use with 80-2 chain, 1″ pitch for driver or driven sprocket applications
Dual type B sprocket provides a stable and secure attachment to the shaft, and can be modified to suit a multitude of applications requiring two chains
Shaft diameter options range between 1 to 1-1/2″ for a number of applications
Varying amounts of teeth and pitch diameter sizes offer application flexibility
High carbon steel for durability and strength
Product description
The Martin double, 
also known as 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 numbers of tooth and pitch diameters offer application flexibility. Made from high carbon metal, it has high durability and strength. Multiple chain capability allows for more power at higher operational speeds with higher load capacity.
Type B sprockets possess a hub extension on one side to supply stability, and allow for the use of full-depth keyways and standard setscrews to attach the sprocket. They can also accommodate an array of shafts. The double design 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”; 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”; size through bore from 2-3/4 to 4-1/4”; and approximate weight from 3.6 to 165 lb. The facial skin width (excluding the hub) is 1.710”. The chain row thickness can be 0.557” nominal. Hubs with a diameter size of 2-9/16” possess a recessed groove for chain clearance. Maximum bores will accommodate standard keyseat and setscrew over keyseat. Slightly bigger bores are possible without keyseat, shallow keyseat, or setscrew at position to keyseat. All Martin sprockets fulfill or exceed ANSI criteria.
A sprocket is a wheel with tooth 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 in turn interacts with another sprocket. Gears can be used to transmit power around a part, based on how they fit with each other. 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. A good 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 & Equipment manufactures power transmission and conveying items. The business was founded in 1951 and is definitely headquartered in Arlington, TX. Martin provides tools that meet American Nationwide Standards Institute (ANSI), Nationwide Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.