The Hougen Copperhead Carbide Rotabroach Bits have been available for some time however the new Hougen Mag Drill HMD508 ($1317, Ohio Power Tool) is the first drill designed to fully take advantage of the higher speed possible of the 18,000 series bits. Similar to the HMD505 ($1270, Ohio Power Tool) the unit features a build in gravity feed coolant tank and 2 speed options for different size cutters. The HMD508 is a little different in that it is rated at 450 & 750 RPM (vs HMD505 at 250 & 450 RPM) so for all the 12,000 series Rotabroaches you would use 450 RPM and for Copperhead Carbide Bits 750 RPM.
The Copperheads Carbide cutters are intended for use in abrasive or tough-to-cut material and should offer extended life over traditional cutters. Unfortunately the carbide bits are only available in a 2” Depth of Cut from 9/16” to 1-1/2” so it’s a fairly limited selection. The Carbide bits have a thinner cutting edge which allows them to operate at the higher rate of speeds. You can also special order (by calling Ohio Power Tool, 800-242-4424) these bits with the Tool-less Fusion style shanks however the set screw anchored bits will provide a longer life span.
If you order the HMD508 Mag Drill before July 31st you can also take advantage of an additional promotion for a FREE Copperhead Carbide Kit 18002 ($296, Ohio Power Tool). Simply use this Mail-in Rebate and Hougen will send you the Cutter Kit for FREE! That’s a pretty good deal and seems like a good way to get people to tryout the Carbide Bits.
