On 02/14/2012 03:35 PM, andy pugh wrote: > On 14 February 2012 18:09, Jon Elson<[email protected]> wrote: > >> For the best finish, of course, you can grind it after the roughing pass. > Hard-turning with CBN is basically single-point grinding. The finish > tends to be excellent. > https://picasaweb.google.com/lh/photo/ajPl1y4hNjLTSUjmdbzQUdMTjNZETYmyPJy0liipFm0?feat=directlink > (The bottom one). It would be better with a real lathe, that was with > Chinese Junk. Andy, what type of steel is that, that is pretty close to the finish I'm looking for. I have a 2 - CNGA433 PCBN KB5625's on order. I couldn't pass up 2 for $5.00.
Also, I found a insert selector on Kennametal's site: http://www.kennametal.com/en/kenna_perfect/kenna_perf_select.jhtml It listed the KB5625 as a general finishing bit. I can also get the KD050 if I find I need a finer finish, but at about $30.00 - $45.00 each, I'll hang off a bit, and see if I need it. This is just a simple prototype, using available material, but it is also a educational process, as I tried turning off a seized, and welded bearing race, but none of my carbide tooling would make much more than a few tiny cuts in it, before they were destroyed. I'm assuming that CBN, or PCD inserts would be the only way to turn it off? (And yes, I tried the grind, and chisel thing first.. all I did was make a mess, and break a chisel.) -- -Mark Ne M'oubliez ---Family Motto Hope for the best, plan for the worst ---Personal Motto ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
