Our Haas VF-2 ate a tool holder last Tuesday... spectacularly

I was running a 3/4" end mill in a CAT40 holder at 8k RPM and the collet nut just gave up. Heard a bang like a shotgun, watched the whole assembly spin out and bounce off the chip shield. Took me 45 minutes to find the end mill buried in the coolant tank. Anyone else had a tool holder just let go for no reason?

2 comments

2 Comments

alice_barnes352d ago

Hold on a second, a collet nut doesn't just "give up" for no reason. That tool holder was likely damaged before you put it in the spindle - a cracked collet or a nut with stripped threads that you missed during inspection. Or maybe the pull stud wasn't torqued right when you installed the holder that morning. Machines don't just decide to launch tooling; ninety-nine times out of a hundred it's a setup error or a worn part that should have been caught. Take some responsibility for your pre-run checks before blaming the equipment.

schmidt.blake2d ago

Blame the machine, classic move...

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