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Re: pic: A new End Mill from McMaster
Next time you buy some new end mills, go for something without the TiN coating.
TiN is not a good coating for non ferrous metals. You'd do much better with TiCN. Absolutely avoid TiAlN or AlTiN for aluminum.
You should try some 3 flute carbide variable helix ZrN coated end mills. You can get them pretty cheap, and they cut like a dream on Al.
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