Variable Speed Marine Pump
An industrial pump manufacturer approached SPIROL with a new heavy duty marine application. In a smaller version pump, the company currently uses a heavy duty .187” diameter Coiled Pin to attach an aluminum shaft to a powdered metal rotor. The shaft / rotor is exposed to 12.5 ft/lbs of torque in this application. This existing application has worked well for years. The new heavy duty marine design exposes the shaft / rotor to 20 ft/lbs of torque and the pump designer wanted help to ensure that the pin was properly selected to absorb the additional torque. The customer wanted to use the same pin in both applications, but in their trials, the pin sheared in the heavy duty application.