Product features
For use with 80-2 chain, 1″ pitch for driver or driven sprocket applications
Double type B sprocket offers a stable and protected attachment to the shaft, and can be modified to match a wide variety 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 double, also known as a sprockets 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 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 better load capacity.

Type B sprockets have a hub extension using one side to provide stability, and invite for the use of full-depth keyways and regular setscrews to add the sprocket. They can also accommodate an array 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”; length 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 is 0.557” nominal. Hubs with a diameter size of 2-9/16” have a recessed groove for chain clearance. Optimum bores will accommodate regular keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at position to keyseat. All Martin sprockets meet or exceed ANSI requirements.

A sprocket is a wheel with the teeth around the perimeter that meshes with a chain, track, or other 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 used to transmit power around a part, based on how they can fit jointly. Sprockets with chains only work in directly 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, 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 transmitting and conveying products. The company was founded in 1951 and is certainly headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), Nationwide Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.