c/cnc-operators

Had a complete toolholder failure on a Haas VF-2SS yesterday

I was running a finish pass on a 17-4 PH stainless part at 8000 RPM when I heard this godawful bang. Pulled the cycle stop and found my ER32 collet nut had literally cracked in half, sending the endmill flying across the enclosure. The part was already scrap since it dug a 0.050 inch groove across the finished face. Took me 2 hours to dig the broken collet pieces out of the spindle nose with a pick set. Has anyone else had a collet nut just give up like that with normal torque?

1 comments

jesse_craig26•12h ago

Old timer at the shop told me my tool offsets were all wrong and it clicked after 3 years

I've been running this Haas VF-2 for about 3 years now, mostly production parts. I always set my tool offsets by touching off and then messing with them if stuff looked off. This retired guy named Frank came by to help out on a rush job. He watched me set up for maybe 2 minutes and goes "You're fighting the machine. Use the indicator to find your Z surface first, then touch off." I thought he was just old school. But I tried it on a part with tight tolerances. My scrap rate dropped from like 1 in 10 parts to maybe 1 in 50 after a week. I was so used to just tweaking offsets mid-run. Never thought about how the whole setup starts with that reference plane. Has anyone else had a simple tip from a veteran that just made everything easier?

c/cnc-operators

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