8/18/2023 0 Comments Rodman drill bits![]() Based on another recommendation, I picked up a drill bit designed for drilling glass and ceramic tile today. And they are also expensive depending on size. They both locally anneal and cut at the same time. They must be used per instructions as the point of contact gets cherry red and you must not linger. These have been around for years and are available from Enco, MSC and others like your local factory supply. ![]() There are also solid carbide and carbide-tipped straight flute drills that are meant to drill hardened materials up to 65 Rockwell C. There is no website yet but they have a toll-free number. Yes, they are expensive but they also have smaller sets. ![]() I never heard of them before but was pretty impressed so I sprang for the large set at the show price of $80. They were self starting and would not bend or break even with tremendous side pressure applied. These are not masonary bits, and I watched him drill through files, ceramic tiles, cinder blocks and a tap. The high-tech bonding allows it to withstand drilling tempertures up to 1900 deg. They are a special cobalt-tungsten carbide tip on a chrome vanadium steel shank. While at the Dayton Hamvention this year I watched a rep from Rodman & Co. (Just FYI, the web-server hosting the pics in the top of the post seems to be down, but the pics at the end are actually attached to the post and are viewable.) Here's a link to the home-made angle iron notcher thread. If there simply is no way to drill holes in this file, is there another readily available source of something that I could use as a metal cutting surface for this notcher? The cutting surface has to be harder than mild steel, because that's what I'm notching with it. Any suggestions? Is there a drill bit equivalent to the abrasive cutting disk? This is the final pieces to getting this notcher finished, but I'm kinda stuck at the moment. I've tried a cobalt drill bit on it, and it barely makes a scratch. ubb/images/graemlins/wink.gif"%20alt=")Īnyway, I need to drill some holes in it. I discovered that I can cut it with an abrasive cuttoff disk pretty easily (after I ruined a bandsaw blade. I've got a file that I've cut up and intend to use as the cutting surfaces on a home-made angle iron notcher (see my post on the sheetmetal fabrication section of this site).
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