Roller chain sprockets, sometimes called single-strand sprockets, possess a series of teeth around a central bore and are used in cogs and chains mixture with roller chains to go conveyors and other industrial machinery. Fixed bore sprockets are made to fit a particular shaft size you need to include a keyway and setscrew therefore they’re ready to install. Plain bore sprockets are manufactured without a keyway or set screw. Keyways or set screws can be machined to the exact size needed by the existing shaft and application. Bushed bores have more clamping area around the shaft to provide a secure fit for high torque or high-power applications when the shaft reaches risk of slipping, such as paper milling and agricultural machinery.