Gene Heskett wrote: > On Wednesday 28 March 2007, Roland wrote: >> At 10:35 AM 28/03/2007 -0400, you wrote: >>> over half an hour per pass though. MCS is selling a little air grinder >>> rated at 70k rpms, >> >> we removed the milling head entirely and mounted a Pferd >> air-tool.
> I wasn't aware the air bearings could be that sloppy. (snip) > I guess what I'm saying is that air bearings can be quite precise, > to buy a spare was more > like $3k or more. That, compared to the $100 tool I'm looking at in the > MSC catalog, says the MSC device is pretty sloppily made. Your comment > re the air compressor tends to back it up. I think you two are talking about completely different things. The "air tool" is basically a die grinder. It is _powered_ by air, which explains the heavy air consumption. But its bearings are just plain old-fashioned ball bearings, and probably not very good ones at that (certainly not ABEC 7 spindle bearings). Air bearings are a whole 'nother ball of wax, and as you say, an air bearing spindle is gonna cost a lot more than $100. Regards, John Kasunich ------------------------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
