The 2CFK size 2 shaft mount reducer cooling fan is designed to prolong the life of your shaft mount reducer by preventing the unit from overheating. This fan has a unique blade design for maximum air flow and long term performance. Fans are always recommended in any application running in ambient temperatures over 125 degrees Fahrenheit. For additional information or to get a quote on our size 2 gearbox fan, contact our customer service team, and we will gladly assist you!