DMU 70 Evo

Marnic · Feb 17, 2012

I Have got a DMU 70 evo linear with an 18000RPM spindle that is now starting to overheat.The tool holders are quite hot when I take them out of the spindle after round about a 30 min run at RPM 8000,the spindle itself is also hot.

Any ideas on where to start looking for the problem if there is one at all would be helpfull.

bryan_machine · Feb 17, 2012

Forgive me if you know/have checked this:

My DMU 60 has a spindle chiller which is tied to a radiator (lots like a car
radiator.)

Assuming your machine has the same, it sure sounds like the radiator fluid is low, or the fluid bad (time to flush like a car radiator?), or perhaps you have a plugup of some kind in the plumbing? Uh, there's got to be pump somewhere as well, no? Find that and see if it's healthy?

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