On Thursday 26 November 2015 01:07:56 Gregg Eshelman wrote: > On 11/25/2015 4:51 PM, Gene Heskett wrote: > > Like a Proxon? Dremel I know, has crap for rigidity in the spindle > > as its in a rubber mount, independent of the motor shaft. I think > > I'd druther get one of the Chinese 48 volt dc drives. But you guys > > said the runout is atrocious. I'll look around some more though. > > > > Thanks Gregg. > > The Dremel I have, the shaft is one piece from the back end of the > armature to the collet and the bearings are solidly in the plastic > housing BUT there's a long length from the front bearing to the > collet.
That is a very old one. None that I have bought over the last 20 years have had a solid shaft to the collet. > I had a Craftsman which had a short stub shaft with two ball bearings > about 3/4" apart with one right behind the collet. A fairly decent > flexible splined coupler connected that to the motor shaft. > Unfortunately its vari-speed part took a $h!t and no replacement > available. I'd bypass that, and use the controller I have if it still works. > A more compact and perhaps easier to mount option would be a Foredom > or similar handpiece. Even better, higher speed and likely better > bearings would be a denture carving tool. I tried to snag a used one > from a dentist office auction but other people were wiling to pay MUCH > more than I. Those, air turbine driven and water cooled to as high as 600k revs, can be had on fleabay for under a $20 bill. But mounting one of them so as to be usable as a spindle would be a whole cloth invention. The inverter powered water cooled kits that could be mounted to the side of the main spindle housing all run about $450 and up and only offer up to 12,000 revs at 400 hz from the inverter. And most need a 254 volt supply. A few have an er20 collet, most are er11. er11 would be fine for this use as quite a few of them come with an assortment of collets. Intended as router replacements for gantry machines I think. My question, even for the complete kits including the water pump is, does the length of hose supplied, usually about 3 meters of some sort of plastic hose, present sufficient radiation area that no other radiator is needed even for long jobs? Or do they need a multigallon reservoir to serve as a huge heat mass and radiator? And since the bank changed the name on my card, without even changing the card number when they issued the new cards, I can't use paypal, so last night I sent them a scan of enough stuff to show that I am indeed the same guy, just renamed to my full legal name. Up till my bank got pissy, I've been the same Gene Heskett my mother called me for her 68 years. For 81 years. Been banking there for nearly 30 years, and they officially don't care that they've effectively put me out of business. Jerks. One of the rules of life is that you don't "fix" what works. I can't buy from ebay directly for even longer. About 4 years ago they changed the PW requirements such that my 21 char password wasn't any good. But because it was no longer valid, I couldn't change it to something that was valid. I spent about 4 hours on the phone one day about a year back, trying to get them to send me a password reset, but those emails never arrived in my inbox. So we then asked for the account to be totally nuked so I could set it up again from scratch, but despite escalating the call up the rights ladder 4 times, no one had the authority to do that. So now I have a totally random generated bogus username I can't remember, and STILL can't set a password for it. Why? They probably send the pw reset msg to that bogus username, probably someplace in West Bumfuck. And nobody at ebay can understand why that its a REAL damned problem. But they have absolutely zero problem sending me 2 to 4 spam messages a day to the original accounts username. Go figure. A method to their madness? Damnedifiknow. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741551&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
