Martin Roller Chain Sprocket, Reboreable, Type B Hub, Single Strand, 12B Chain Size, 19.05mm Pitch, 36 Teeth, 20mm Bore Dia., 229.17mm OD, 100mm Hub Dia., 11.1mm Width

The Martin metric type B sprocket is suitable for use with series ISO 12B-1/metric 60 chain with 19.05 mm (0.750”) pitch for driver or driven sprocket applications. Varying numbers of teeth, pitch diameters, and stock bore sizes offer application flexibility. Made from high carbon steel, it has high strength and durability. Type B sprockets have a hub extension on one side to provide stability and allow for the use of full-depth keyways and standard setscrews to attach the sprocket. They also can accommodate a wide range of shafts. The chain data for this class of sprockets is BS 228/13, ISO 12B-1; pitch is 19.05 mm (0.750”); roller diameter is 12.07 mm (0.475”); roller width is 11.68 mm (0.460”); and tensile strength is 2,950 kg (6,500 lbs). The options for this class of sprocket are: number of teeth from 11 to 114; pitch diameter from 67.62mm to 691.36 mm; stock bore size of 12 mm to 32 mm; maximum bore size from 32 mm to 92 mm; hub diameter from 47 mm to 140 mm; length through bore from 35 mm to 55 mm; and approximate weight from 0.53 kg to 33.98 kg. The tooth width is 11.10-mm (0.437”) nominal. Maximum bores will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at angle to keyseat. All Martin sprockets meet or exceed ANSI standards. A sprocket is a wheel with teeth around the perimeter that meshes with a chain, track, or other perforated or indented material. Unlike gears that mesh with another gear, sprockets mesh with a chain, which then interacts with another sprocket. Gears can be used to transmit power around a corner, based on how they fit together. 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. An 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 & Gear manufactures power transmission and conveying products. The company was founded in 1951 and is headquartered in Arlington, TX. Martin provides tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.

• For use with 12B-1 chain, 19.05 mm pitch, meets ISO metric standards
• Type B sprocket offers a stable and secure attachment to the shaft
• Shaft diameter size from 12 mm to 32 mm for a variety of applications
• Varying numbers of teeth, pitch diameter sizes, and stock bore sizes offer application flexibility
• High carbon steel for strength and durability