Originally Posted by Engloid

If you guys ever use a hole saw, try submersing the part in water, and do the holesaw cutting underwater. It kicks ***!! Lubrication is good, but if the parts are kept cool, lubrication really isn't necessary. You will cut much better with even an air nozzle pointed at the area and blowing cool air than you will with quite a bit of oil. Remember that although friction is the cause of heat, you cannot eleminate but a very small part of the friction, and that friction is pretty much what is making the cut. By keeping the part and saw cool, you don't have to worry about the friction.