Product features
For use with 80-2 chain, 1″ pitch for driver or driven sprocket applications
Double type B sprocket offers a stable and secure attachment to the shaft, 
and will be modified to suit a wide variety of applications requiring two chains
Shaft diameter options range between 1 to 1-1/2″ for a variety of applications
Varying numbers of teeth and pitch diameter sizes offer application flexibility
High carbon steel for durability and strength
Product description
The Martin double, 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 numbers of the teeth and pitch diameters provide application flexibility. Created from high carbon metal, it has high strength and durability. Multiple chain capability permits more power at higher operational speeds with higher load capacity.
Type B sprockets possess a hub extension on one side to supply stability, and invite for the use of full-depth keyways and regular setscrews to add the sprocket. They are able to also accommodate a wide range 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”; duration 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” have a recessed groove for chain clearance. Maximum bores will accommodate regular keyseat and setscrew over keyseat. Slightly larger bores are possible without keyseat, shallow keyseat, or setscrew at position to keyseat. All Martin sprockets meet or exceed ANSI requirements.
A sprocket is a wheel with tooth around the perimeter that meshes with a chain, track, or various other perforated or indented materials. Unlike gears that mesh with another equipment, sprockets mesh with a chain, which in turn interacts with another sprocket. Gears can be utilized to transmit power around a corner, based on how they can fit jointly. 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 standard bicycle, that includes 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 transmitting and conveying items. The company was founded in 1951 and is definitely headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), Nationwide Aerospace Regular (NAS), and Deutsches Institut für Normung (DIN) standards.