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I used to think a broken tool was just bad luck until my crash last month
I was running a batch of 304 stainless parts on our old Haas VF2, just a simple pocket routine. About an hour in, the spindle load spiked and I heard that awful crunch sound. The 3/4 inch end mill snapped clean off and took a nice chunk out of the part. I always just blamed tool wear before, but this time I checked the runout on the collet with a dial indicator. It was out by almost 0.0015 inches, way more than I thought. I swapped to a new collet and the next tool ran smooth for the full cycle. Has anyone else caught a crash that turned out to be a simple holder issue like that?
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elliotw375mo ago
That runout seems pretty minor to cause a crash.
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blairf485mo ago
Would you have thought that little runout mattered? I used to brush off small numbers like that, but after a similar snap on some aluminum, I check my holders way more often now. It's crazy what a tiny bit of wobble can do under load.
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jamie643mo ago
Man, I feel that. It's wild how something that looks totally fine on the stand can turn into a nightmare once you put any real load on it. Definitely learned that lesson the hard way myself.
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