Jeremy; > an endmill holder of course!!! thats what they are for.
If you mean the ones with the screws on the side for weldon-shanked end mills, they have other issues. By definition, the holes in these holders are larger than the end mill shank. (otherwise you'd never get the end mill in) The screw acts as a pivot point. So, you essentially have an end mill flexing in the holder; leading to wear, and if the end mill is not inserted properly, it *will* walk out as far as the screw will allow, so if you do use these, of course you are going to pull the end mill out by hand as you tighten the screw. The wear will appear as oval on the end of the holder, but it'll be tapered. Think about it - you are shaking that end mill shaft a few thousand times per minute, and there IS play in there. Ok, ok. I gave away my clarkson auto lock chuck because screwed end end mills are not available, while plain shank end mills are a dime a dozen. (that's an expression, not a pricing structure!) For the last 2 decades I have only used top-quality ER collets. My ER-25 set are Regio-Fix (Swiss) with Schaubin (sp?) holder. My 16 and 40 sets were from Maritool - probably paid too much, but as they all "just work", with no known issues, so I'm sold. Just make sure that they are clean (I use a bit of aluminum "flashing" rescued from some house-repair contractors to clean the grooves of the collets). Anyway, I'm no expert, but the above may be something to think about. Will *you* experience wear in these screwed-shank holders? I've absolutely no idea, just keep it in the back of your mind that this can and does happen. Back to your regularly scheduled programme… ;-) John Alexander Stewart. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
