On Thursday 29 March 2007, Dean Hedin wrote: >Gene, I definitely agree if I could spin the bits faster I could reduce > tear out. > >The only thing that I though might work (to get better rpm's with tiny > bits) is to use one of those >brushless DC RC airplane motors. Some of them run up to 55-60k rpm. > I think I might try this. > >Running a compressor to drive an air tool is not practical for me. > >BTW, Those tiny little router bits are too fragile. I find a much more >durable solution is to grind a carbide blank >to a sharp point. Then grind half the point away from the side. > Splitting the cone lengthwise, so to speak. >I do this with the blank chucked in the lathe and a diamond wheel on a > tool post grinder. Takes some time >to do initially but not as long as I thought it would, plus resharpening >takes only moments.
I just ran across some 4" tile cutting diamond blades on sale at Lowes last night, for 6 bucks! So I spent last night and this afternoon making an arbor for them. The intention is to stick them in a 1/2" collet in my micromills spndle, and make a bit holder, something like the 5C stuff, that I can mount on the mill's table, to hold the dull bit at a suitable angle for sharpening and let the mill spin this 4" wheel with the most gentle of touches to tune up a carbide bit. Right now I'm doing those chores by hand with one of those little $15 diamond dremel disks. It works, and if I pay attention, works well, but it seems this would give me much better control over the angles than I can get by hand with the dremel. I haven't considered just using the dremel as the bit driver, again because the dremel's drive coupling is only slightly stiffer than damp noodles. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The hardest part of climbing the ladder of success is getting through the crowd at the bottom. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
