University of Wisconsin-Madison Physical Sciences Lab

Example: Ram Drill Air Motor Heat Sink

Photo of Ram Drill Motor Heat Sink

While drilling with the Ram Drill (also known as the Shot Hole Drill), bearings in the air motor were failing due to heat. This was caused by the motor’s heat sink, which was made of stainless steel (on the right in the above picture). A new aluminum heat sink was designed, with fins cut into the surface to greatly improve cooling through nine times the surface area.