Eric. Posted October 26, 2011 Report Share Posted October 26, 2011 Quote Link to comment Share on other sites More sharing options...
Bombarde16 Posted October 27, 2011 Report Share Posted October 27, 2011 Fascinating solution to an eternal problem: Drilling a square hole. I'm assuming that it was jigged up in a massive and massively expensive CNC machine. I wonder if this sort of technology will ever make it down to consumer level. For that matter, if it's even possible. An eccentric cutter head moving that fast has got to set up some enormous vibrations that would be problematic if not prohibitive in a lighter weight or even hand-held tool. Quote Link to comment Share on other sites More sharing options...
wilburpan Posted October 27, 2011 Report Share Posted October 27, 2011 An eccentric cutter head moving that fast has got to set up some enormous vibrations that would be problematic if not prohibitive in a lighter weight or even hand-held tool. Doesn't the Festool Domino have a cutter that vibrates/oscillates to make the tenon slot? Not exactly the same vibration as the cutter in this video, for sure, but it indicates that the problem may not be completely unsolvable. Quote Link to comment Share on other sites More sharing options...
Dan S Posted October 27, 2011 Report Share Posted October 27, 2011 You can't make a truly square hole, the only way to do that is with a broach. You can however approximate a square hole pretty well. This video shows how the system works, and provides some information about how close to square you can get. Quote Link to comment Share on other sites More sharing options...
Ben@FineWoodworking Posted October 27, 2011 Report Share Posted October 27, 2011 That animation makes me think on the wankel (sp) engine. Quote Link to comment Share on other sites More sharing options...
mikepdarr Posted October 27, 2011 Report Share Posted October 27, 2011 I was thinking rotary cutters had been around for awhile. We had one back in metal shop in the early nineties. Quote Link to comment Share on other sites More sharing options...
nateswoodworks Posted October 28, 2011 Report Share Posted October 28, 2011 At an auction several years back I had bought an OLD 1/2" drill (you know the ones that will wring out your arm and twist it around your body) a few years back because I needed one more tool that could kill me-and it reminded me of my grandpa's. Anyways, with the drill came a small set of bits that were so cheap they actualy drilled an oval hole. They flexed but didn't break, make them cheaper and you could drill square holes around corners! Nate 1 Quote Link to comment Share on other sites More sharing options...
Stephens_Shop Posted November 12, 2011 Report Share Posted November 12, 2011 That's just cool in slow mo. Quote Link to comment Share on other sites More sharing options...
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