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 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 diameter sizes offer application flexibility
High carbon steel for strength and durability
Product description
The Martin double, also referred to 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 teeth and pitch diameters provide application flexibility. Created from high carbon steel, it has high strength and durability. Multiple chain capability permits more power at higher operational speeds with greater load capacity.

Type B sprockets possess a hub extension on one side to provide stability, and invite for the use of full-depth keyways and regular 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”; length 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 definitely 0.557” nominal. Hubs with a diameter size of 2-9/16” possess a recessed groove for chain clearance. Optimum 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 satisfy or exceed ANSI standards.

A sprocket is a wheel with tooth around the perimeter that meshes with a chain, track, or 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 fit together. Sprockets with chains just work in directly lines. Some common advantages of chain-drive systems include minimal slippage, a set ratio between rotating shafts, and versatility with many different chain attachments and sprocket materials selections. A good example of a power transmission system is a typical bicycle, that includes a sprocket and a chain to provide power from the rider’s legs to the wheels producing the bike move.

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