[asperjack]

Hello, I am pretty new to this stuff and was hoping someone could help me out. Our machining center is almost 20 years old. It's a Mazak AJV 35/60 rated at 3150 RPM. I am attempting to make a die for an elbow that requires 1/16" inside radii. The problem is that with our 1/8" diameter carbide ball end mill, the tool snaps whenever we try to cut our material, S-7 tool steel. I was wondering if there was another type of tool I could use, such as cobalt. One manufacturer recommended we try one made of M42. Can anyone tell me why or why not cobalt would be better than carbide? Or any other potential solutions (besides buying a new machine)?

Thanks for the help!

Casey

[mmachining]

Whats your current speeds/feeds?