Sprockets

A sprocket is a profiled wheel with teeth that meshes with a chain. A sprocket is not a gear. It is distinguished from a gear in that sprockets are never meshed together directly. Sprockets transmit rotary motion between two shafts, and are one of the most popular ways to transmit power. Sprockets are utilized to decrease or increase speed by differentials in the number of teeth between driver and driven sprocket. Sprockets can also be utilized in conveying systems, where the chain or belt is utilized to move material from one point to another.

Sprockets are available in many different materials, such as steel, stainless steels and various plastics or urethanes. They are available in many shapes, sizes and styles.

The four most common sprocket styles are:

• Type A- Plain or flat plate
• Type B- Hub on one side
• Type C- Hub on both sides
• Type D- Detachable hubs

When selecting, replacing or identifying a sprocket, it is important to know the dimensions (and ideally the part number) of the chain which is to run upon it, specifically the pitch (center distance between teeth), roller diameter, and the roller width of the chain. This is necessary to identify the type and size sprocket. The number of teeth on the sprocket is also necessary if a part number is not available. Sprockets are normally available bored to size or with a bushing system. The sprockets lock onto the shaft through either a keyway and set screw system, a bushing system or some other sort of locking device, such as a collar or shrink disc.

Please contact a Bearing Service sales representative to assist in designing in or providing the right sprocket for you application.

Here is a list of Manufacturers / Brands that we represent:

• Martin Sprocket & Gear
• Regal PTS (Browning)
• Rexnord/Linkbelt
• Baldor/ Dodge
• UST
• Altra Motion (Boston Gear)
• P.T. International
• Van Zeeland
• SKF