For use with Hougen Portable Magnetic Drills and machine tools operations on materials up to 350 BHN. Made of hardened, high speed tool steel and precision ground, cutters feature a 3/4" diameter shank (Model HMD933 requires adapter #02386) and are available in 1, 2, 3, 4 & 6" D.O.C. Plus, modified end tooth geometry for stacked plate drilling is available. "12,000-Series" Annular Cutters are resharpenable using the 10950 Sharpening Machine.
Drilling through stainless steel is a tough job. Using a Hougen mag drill with annular cutters makes for short work. My first attempt burned up the annular cutter. Cutting was done with water pouring into the cut. Keeping the cut cool is the key. No damage to the cutter with this process. Mild steel use Hougen's lubricant. No problem.