Quote Originally Posted by spluppit View Post
Yes of course they can be sharpened. It's very unlikely to be cost effective though. You can get 2mm ball nose in various forms from somewhere like apt for a fiver or less and the quality is perfectly usable.

I'm a little surprised you managed to make a carbide end mill glow red without it breaking especially one that small. Are you using a router style machine and with a high rpm spindle? The chances are that cutter will be totally foobared.
Yes it's a 3040T but used the feed and speed calculator that gave a speed of 7320rpm and 117 feed rate for stainless.

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