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Rant: I just read a trade journal article that said a 0.001 inch tool deflection can cause a 0.003 inch error in the cut, which is way more than I thought.
I found this in the latest issue of Modern Machine Shop, and it makes me think we should all be checking our tool holders more often than we do, right?
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josephl676mo ago
Come on, that's just magazine talk to make you buy new stuff. In a real shop, you're cutting metal, not doing brain surgery. A few thou here or there gets lost in the mix. If you stopped to check every holder for a tiny bit of runout, you'd never get any parts out the door. My old boss ran the same beat up collet chucks for twenty years and the parts were always fine. When's the last time a part actually failed because of a number that small?
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charles_green956mo ago
Tell me about it, I spent a whole afternoon chasing a finish issue once only to find my holder had more runout than my dating history. Felt like a total clown. I get the "just cut metal" mindset, but that multiplier effect they talk about is sneaky. It's not about one perfect part, it's about every part being a little off and adding up over a run. My cheapo indicator lives in my box now for a quick sanity check before I start blaming my feeds or the machine.
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