Which Grit For Diamond Wheel???

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I am thinking of getting a 6" diamond grinding wheel for sharpening tungsten. They come in 180 and 300 grit.............which one is the better grit???
Reply:300 or higher.  The smaller/shallower grooves you can put in that tungsten the better.  Mine's a 220 grit.  Next time I'll probably get a 600 grit.
Reply:Check this site out.  Before you buy.http://www.kingsleynorth.com/skshop/...450&catID=1074
Reply:I bought one with the concave wheel, work good for me.http://www.ebay.com/itm/Concave-Diam...item56563ee168MillerMatic 212, Lincoln Precision TIG 225, Hypertherm 45XP
Reply:Originally Posted by PoptmCheck this site out.  Before you buy.http://www.kingsleynorth.com/skshop/...450&catID=1074
Reply:CK Worldwide says 60 grit or finer for grinding tungsten.A coarser grit is faster. I've tried grinding both with coarser and finer grit and I can't notice any difference in the arc but perhaps somebody else can. Since I can't see any difference I would of course get the coarser wheel.PS. If someone has a source that shows pictures or video of the arc that shows that a finer grit with an identical ground point is better, please post a link!Last edited by Pete.S.; 05-15-2013 at 06:55 AM.
Reply:They say not to grind a tungsten sideways (circumferentially) on a wheel cause it leaves grooves that mess up the arc.  Grinding longitudinally for me the whole way is a real pain.  Tungsten never ends up with a straigth concentric taper if I grind longitudinally the whole way.  Always ends up off center and either concave or convex or all three.So I grind sideways to get the tungsten in the right shape with a fine grit diamond wheel then grind it longitudinally a bit to remove the circumferential grooves.  The finer wheels produce much shallower circumferential grooves so that when I touch it up longitudinally it's easy to get the groove going in the other direction and hold what appears to be a pretty good profile to the naked eye.  It's most likely over kill but it takes less than a half minute.