TIL about coolant flow rates the hard way on a Haas VF-2

Visited a shop in Akron last Tuesday to look at a used machine they had for sale. The owner showed me a Haas VF-2 that had a weird chatter mark on every part for the last 3 months. He'd swapped tools, changed feeds, even had a service tech out. Turns out the coolant nozzle was partially clogged and only pushing 1.2 gallons per minute instead of the 3.5 it should. After a quick clean out and a new nozzle tip the chatter was gone. Has anyone else spent weeks chasing a problem that ended up being something so simple?

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morganhill2mo ago

Pushing 1.2 gallons per minute" is a hell of a find. I've had similar where a mist collector filter was so caked it choked the machine's entire chip evacuation system. Took two weeks and a pallet of bad parts before I just blew it out with an air gun as a desperate last try. Sometimes the cheap, dumb stuff nicks you harder than any spindle bearing ever could. Your mileage may vary but I bet that owner still feels sick thinking about what that clog cost him.

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nancyw972mo ago

I used to think the fancy expensive parts were always the first thing to cause downtime, but this kind of story really shifted my view. It's wild how a simple clogged filter can stack up days of lost production and tons of wasted labor before anyone thinks to just blow it out. Sometimes the cheapest, dumbest fix is the one you never see coming until it's already cost you a small fortune.

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