Spent 6 hours chasing a 0.002 inch tolerance issue

Got a job running a new aluminum part on a Haas VF-2 last Wednesday. Everything looked good in the setup until the first inspection showed the bore was 0.002 over. I kept tweaking the offset, running test cuts, blowing chips out of the fixture, nothing worked. Turned out the collet nut had a tiny burr on the threads from when I changed it two weeks ago. Filed it down and the next part was dead on. Has anyone else got a fix that simple after a whole day of frustration?

2 comments

2 Comments

the_beth11d ago

Buddy of mine spent an entire shift chasing a 0.005 runout on a lathe before realizing the chuck key was still stuck in the chuck. Filed that under "stuff that makes you question your life choices.

terry_walker11d ago

Did he file it under "checking for the dumb stuff first"?