Old habit of using coolant through the spindle finally bit me hard

For like 8 years I always ran coolant through the spindle on my Haas VF-2. It felt right, you know, keeping everything wet and cool. Then last month I had a job with a super tight tolerance on a 316 stainless part. The finish was all over the place, chatter marks everywhere. After 3 scrapped parts and about 4 hours of messing with feeds and speeds, a old timer walked by and said 'why you not using that external nozzle setup?' I switched to a flood nozzle aimed right at the cutting zone and it was like a new machine. Finish came out perfect, tool life doubled. Now I only run coolant through the spindle for basic stuff, never for precision work. Has anyone else had that moment where a simple change like that fixed everything?

2 comments

2 Comments

richard1103d ago

Yeah, read that through coolant can trap heat instead of moving it.

oliviapatel2d ago

That's a really good point, but I think the science might be a tiny bit backwards on that one. Actually coolant moving the heat away from the engine is exactly what it's supposed to do (it absorbs heat and carries it to the radiator). If the coolant is trapping heat instead, that usually means there's a problem like air in the system or the water pump isn't working right. It's more like the system failing to move it rather than the fluid itself being bad at its job.