A chain drive is a way for transmitting power. The most common use is in a roller chain, where a series of chain links are connected in a closed loop, and power is transmitted via one or more sprocket gears. Roller chain drives have been used in wastewater treatment facilities since the 1960's. The chain materials are typically cast iron, or machined and/or welded steel and stainless steel.

This plastic chain link provides provides superior corrosion and wear resistance, and is also lighter in weight, providing energy savings. While the ultimate strength is lower than a metal chain, smooth transitions and gentle radii ensure stresses are well distributed, enuring robust performance. A classic example of a well-engineered plastic part.