The 5CFK size 5 shaft mount reducer cooling fan is designed to increase the durability of your shaft mount reducer by preventing it from overheating. It features a specialized blade design for superior air flow and long-lasting efficiency. This fan is crucial for any setup operating in temperatures higher than 125 degrees Fahrenheit. For additional information or to get a quote on our size 5 gearbox fan, contact our customer service team, and we will gladly assist you!