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About 15 minutes in a 6mm endmill failed. Basically the endmill came loose, dropping down into the wood till it shattered. I believe it was due to a combination of dull cutter and loose/worn collet.

 

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Seems we have some differing opinions. And yes, I have one as well. There's an old saying in there somewhere but I digress. Paint to me is something that covers up the beauty of the wood and it's grain. If I'm going to paint something it might just as well be plastic or some other material than wood. But again, it's a personal thing. Either way the work itself is fantastic.
 

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Collets have a life span of 400-600 hours, which roughly translates to between two and three months with the collet being used eight hours a day. When inspecting your collet, metallic damage, such as bell mouthing or burrs, should be checked with every tool change.

Glad to hear there is nothing critical, safety is the most important of all work.
 

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Mike
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Nice carving Dan. I want to see that one when it is finished.

Good thing is that you were not hit with any of the bit when it broke and it looks like that was part of the roughing pass where there was plenty of wood. People find it hard to believe that a bit that size can break like that but carbide is brittle and too much deflection and really be bad even on these big bits.
 

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Theo
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