[millingkevv]

Hello cnczone, we have a 4020 doosan, i think it's a 2006 or 2007. Wondering if anybody has had issuses with the spindle getting warm? It has almost 5000 hours on it. We bought it brand new and have had zero repairs on it. I am the only operator on this machine and absoutley love it. Its never been crashed. It is the most accurate, rigid mill I have ever been on. Only thing that worries me is when running tools at 9000 rpms + for over 30 minutes it sometimes will not eject tools when you take them out manuallly. It just stays in the spindle but you can here it unclamp. When this happens i simpily m6 to another tool and the machine pulls them out no problem.. Just a little worried about bearings overheating or whatever it may be. Anybody have input on this??- Kevin

[dcoupar]

Hello cnczone, we have a 4020 doosan, i think it's a 2006 or 2007. Wondering if anybody has had issuses with the spindle getting warm? It has almost 5000 hours on it. We bought it brand new and have had zero repairs on it. I am the only operator on this machine and absoutley love it. Its never been crashed. It is the most accurate, rigid mill I have ever been on. Only thing that worries me is when running tools at 9000 rpms + for over 30 minutes it sometimes will not eject tools when you take them out manuallly. It just stays in the spindle but you can here it unclamp. When this happens i simpily m6 to another tool and the machine pulls them out no problem.. Just a little worried about bearings overheating or whatever it may be. Anybody have input on this??- Kevin

Does it have a spindle cooler? If so, is it working correctly?

[millingkevv]

It does have a spindle cooler, and as far as i know it is working correctely.. How would one diagnose a malfuction in the cooler?? Any help is appreciated,thanks! Kevin

[Jaguar]

Have you measured the spindle temps?

J.