chain sprocket

Finished bore sprockets provide increased prevention of shaft slippage over minimum simple bore sprockets. Finished bores allow for the roller chain sprocket to move larger loads with an increase of accuracy.

Transmission Chain Toronto Gear Works produces ready-to-ship completed bore sprockets that are produced with precision and are fast and easy to install. Our catalogue features a variety of finished bore sprockets that can match many precise overall performance requirements.

Toronto Gear Functions stocks steel finished bore roller chain sprockets for #25 (0.250” pitch) roller chain. We stock these steel sprockets in tooth counts ranging from 9 to 72. Our completed bore sprockets with a 0.500” bore or smaller are given two set screws. All of our completed bore sprockets with a 0.625” bore or greater have a standard keyway and two established screws. The keyway is usually centered on the tooth and the set screws are located over the key at 90 degrees.

Steel finished bore #25 roller chain sprocket part numbers can be determined the following:

25BF + Tooth Count + “x” + bore size.

An example will be 25BF72x1-3/8. That is for a #25 roller chain. It includes a “B” design sprocket which implies that it has a hub. It has a finished bore of just one 1.375” and it provides 72 teeth.