Mori horizontal spindle problems

[underthetire]

I've never heard of this, but anything is possible. I would suspect something wrong with the air/oil mist though. Should have enough air purge with that system to keep coolant out. Mori will not want you to turn up the oiling for that system, but I have done it at a shop with 4 of them in a cell. They replaced spindles every 18 months before, now they can't remember the last time they did one. I think factory one one lube shot every 120 seconds if I remember correctly ( don't have a ladder diagram here ). I decreased it to every 90 to 100 seconds. Don't over oil however, that could destroy a spindle.

[cullipj]

thanks for the ideas. We will check it out when we get the new spindle in. Are all horizontals this sensitive with their spindles? Our verticals run for years on end without changing spindle bearings

[underthetire]

Thats a tuff question. I would say in general no. But it all depends on the series of machines, where in the country the machines are, and hours of use. The MV40M verticals on the west coast used to eat spindles for lunch. East coast they were fine. West coast tends to do a lot of high speed aluminum cutting, where the east coast used to do a lot of heavier work with lower RPM. Mori came out with a fix for those machines, wich was air/oil spindles replacing the grease pack. SH40/400 spindles were a little more sensitive at first then the other SH series, but even the SH63/630 had problems. They were all re-designed/modified by Mori until they became pretty stable. The SH series ( especially sh XX ) was the very first generation of the new high speed centers Mori designed. That was in the very early 90's. The new NH series are really super nice machines that from what I saw never had the teething issues of the early machines.

Keep in mind that horizontals typicaly run twice as much as a vertical does because of the APC.

Again, check the stuff I told you. Something is not right somewhere.

[APP]

We run a SH633, with lots of cast iron, that just kills the coolant,and have never had an issue. 10 k RPM spindle. Seems odd to me.


Locktiting pull studs? Serous? I have never had one come loose if torqued. Sometimes you have to pull the stud out to get tooling out. It wouldnt be worth the hassle. I have never seen this done, nor would ever do it. There is no way that coolant could get past two ground surfaces anyway.

[underthetire]

Originally Posted by APP We run a SH633, with lots of cast iron, that just kills the coolant,and have never had an issue. 10 k RPM spindle. Seems odd to me. Locktiting pull studs? Serous? I have never had one come loose if torqued. Sometimes you have to pull the stud out to get tooling out. It wouldnt be worth the hassle. I have never seen this done, nor would ever do it. There is no way that coolant could get past two ground surfaces anyway.

Wanna bet ! I've seen ruined drawbars from coolant getting through. 1500 PSI will get in a lot of places. I never said to do it to keep them from comming loose !

[charm_raja]

Hi
This Raja I have Mori seiki SH-50 HMC with Fanuc 16MB controller in this the Atc not working .But other axis moving good .And Auto cycle not working not working.....

Please help me
i need cicuit diagram and pmc backup and keeprelay details etc....