Dmg Mori Nhx5000 Install It As

We actually pulled it to change the coolant and clean the tank.

The big sales pitch they used to sell this machine was their 24 hr parts ship guarantee or its free.

Has anyone else had any trouble getting parts or service for their Mori.

Quite unfortunate though, seems you guys bought that machine only a few months ago.

I would hope Mori is working on getting us a brand new spindle.

Dmg Mori Nhx5000 Install It As

If I heard right there will be some of their people here to help install it as well as the techs from the dealer we bought it from.

We are going to need at least two more horizontals in the near future.

After seeing what we could accomplish with a 12K machine we had in house while ours was being built, I would be inclined to just get two slower machines, but then again, I am not the one calling the shots.

The spindle that went in was different than what was in it, so they did do a redesign.

Burn in tonight. tomorrow they will come back and do their checks and hit the road.

I did hear that a Mitsubishi guy was supposed to be here today as well to update the software.

I ended up ordering some 6 long toolholders for a saturday delivery.

We had Mazak check our horizontal at its first PM, but that was mostly to check for settling, but I would insist that they check after installing the spindle (and you can have them cover the settling of the machine in this service call) We had MethodsToyoda check the spindle squareness by sweeping the table on our vertical after all 8 spindle replacements (yes, EIGHT, and none were crashes) Steve.

Coolant in the spindle bearing grease, well, actually NO grease after the coolant washed away its effectiveness.

This was on a 6k-50 taper machine, so certainly not a high speed failure.

This machine was built by Awea, aka Yama Seiki in the states, and they certainly have had their share of spindle failures around the globe due to the same issue, which was basically admitted to me by the GM of Awea and the President of Yama Seiki when standing in my shop.

Poorly designed labrinth seal at the bottom of the spindle - there just was not enough depth to the labrinth grooves to keep coolant out, and once it got in there, there was no way for the coolant to escape (fyi - a Matsuura greased spindle has drains off each groove to get rid of what is stopped, well at least ours did.) Anyway, poor design - a 50 taper Matsuuras grooves are about 14 deep, the Aweas were about 0.100 on the face grooves, and the radial grooves were similar on the Mat, but basically non-existant on the Awea.

We (Toyoda guy, Yama Seiki guy, myself) all adjusted the air purge around the spindle nose (Toyoda tech actually turned it down thinking that too much air caused a venturi effect and sucked the grease out - that spindle made it a record 20 hours before coming to a skreeeeeeeetching hault), but all to no avail, we never got over a couple hundred hours on a spindle after we had it figured out.

Toyoda ponied up for a couple of the spindles then claimed we crashed it, and said 8k for a rebuilt, we then went to Setco with the same poor life, and then finally a new one from Yama Seiki.

The chips in the coolant are still a problem, we keep hearing that there is a fix for this and they are sending updated parts for it.

I did get a satisfaction survey call from DMGMori Seiki today on our duravertical and i did tell him about our troubles with the NHX and he said this is very good feedback we will see what happens.

We will be pulling the coolant tank out later this week after almost a year, it will be interesting to see how much accumulated cships there are in the tank.

I may have to add some external fitration to the tank if it looks real bad, might need to add a couple pipe fittings while its opened up and plan on a big bag filter to pull out the fines.

Steve.