Drilling flat bottom holes..... Thanks!
Thanks to everyone who responded to my request for info on drilling some
flat bottom holes in aluminum. If I can't track down a flat bottom drill bit that meets my specs, I'll just try taking several standard 7/8" bits (with turned-down shanks) to a machine shop and see what they can do to flatten the ends. Next, I'll try it out on some scrap and see what happens. If that doesn't work, I'll just drill all the simple holes myself (42 holes in each of about twenty 11" x 19" aluminum plates), and then take the batch to a machine shop and let them do the two bottom holes that are on each plate. Thanks again. Marty |
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