Burrs - to hard ?

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The burrs I buy for die grinding are to hard.      I ruin and crack them the first time I make an interrupted cut or the grinder gets squirrly on me.     You know the story.  ,Does anyone know of any brand or where to buy ones that are softer or more ductile than what I described?     I realize they may wear quicker, but that's OK.   I'd think there ought to be some made of good hss or something.   Then they'd take more abuse.   ??
Reply:You get what you pay for when it comes to carbide tools. Cheap ones tend to skip the hot isostatic pressing step, and also tend to skip quality control steps.I buy from C.T.I. http://www.carbtools.com/ They last for months. I use them for cleaning up corners nearly every day.You might also consider buying a quality die grinder. Slop in the bearings is going to lead to more chipping. You might also consider buying double-cut or burrs with a finer teeth=less material removal per tooth.Last edited by Joshfromsaltlake; 07-09-2012 at 05:51 AM.
Reply:I use carbide burrs, swear by them.And they will break if you start chattering with the die grinder.  Ya know, when it starts bouncing around in a hole   Nothing you can do about it except use a steady hand, and limit the pressure on the burr/tool.  Also......start the grinder before touching it to the metal, especially in a hole.  Start it, then move into the hole carefully.  Another way to keep it from chattering is to always work against the spin of the tool, don't go with it when cutting.  Same principle as using a milling machine, climb milling causes chatter and stress on the machine and tool."Any day above ground is a good day"http://www.farmersamm.com/
Reply:Originally Posted by farmersammAnother way to keep it from chattering is to always work against the spin of the tool, don't go with it when cutting.  Same principle as using a milling machine
Reply:My die grinders are good.   I've been mostly using the brand Atrax,    I only make conventional cuts.    What I'm saying is I'm looking for something that'll take abuse.   Carbide does not.    I'm looking for something more ductile.     I have one carbide burr I bought several years ago from a surplus place, It's great.   I don't know what it's made of.    Its a sphere shape single gut.   It would have cracked on me a 20 times by now if it were carbide.   Its also had great longevity.   My guess its some hss w/ a mix of cobalt or something.   So its out there, or at least was.
Reply:Originally Posted by 123weldThe burrs I buy for die grinding are to hard.      I ruin and crack them the first time I make an interrupted cut or the grinder gets squirrly on me.     You know the story.  ,Does anyone know of any brand or where to buy ones that are softer or more ductile than what I described?     I realize they may wear quicker, but that's OK.   I'd think there ought to be some made of good hss or something.   Then they'd take more abuse.   ??
Reply:Thanks Old Iron, I'll call and talk to them.     I was just now thinking, if they were hss, theyd burn up from the high rpms of a die grinder.    So there must be a medium out there.    Or it may be that I'm just that physically uncoordinated, its seeming I'm the only one that has this problem
Reply:Heck, I not only ruin the burs, I recently destroyed a good die grinder.    I had one of those electric milwaukee ones w/ the long handle, there over 200 bucks.   I was trying to take the seems out of some small sched 80 pipe so I could run a 3/4 shaft through it.    I ended up bending the spindle or quill or whatever you call that piece that sticks out the end of the grinder.  So I replaced it w/ a 150 dollar dewalt.    It's shorter, and the paddle switch is nicer than that long milwaukee one, to me anyway.   I like it better.   It's an amp or two less, whick makes it easier for me to handle when grinding.
Reply:Originally Posted by 123weldHeck, I not only ruin the burs, I recently destroyed a good die grinder.    I had one of those electric milwaukee ones w/ the long handle, there over 200 bucks.   I was trying to take the seams out of some small sched 80 pipe so I could run a 3/4 shaft through it.    I ended up bending the spindle or quill or whatever you call that piece that sticks out the end of the grinder.  So I replaced it w/ a 150 dollar dewalt.    It's shorter, and the paddle switch is nicer than that long milwaukee one, to me anyway.   I like it better.   It's an amp or two less, whick makes it easier for me to handle when grinding.
Reply:I have not ever seen a bur for cutting steel that was not carbide. As was stated before, you get what you pay for. There are may different grades of carbide, as well as processes for making it into tooling. I usually try to stick to American made carbide tooling, and it seems to last much longer.