Matsuura ES450H grease lubrication, Coupling drive, 12,000 rpm
We receive spindles from Canada on a monthly basis. One of our longtime customers has been using us for years on their Matsuura spindles. The customer notified us that this spindle was coming in and needed some work. When we received the spindle it could not be run up as the spindle was seized. The spindle was disassembled. We found the rear roller outer race was cracked and the cage was destroyed. The rear roller was destroyed as it was not rated for the 12,000 rpm that the customer runs the spindle. The taper was in rough shape, the rear housing shoulder was not at ISO specification, the grippers were worn, the drawbar pin and hex were damaged.
We let the customer know that in order to bring this back to the OEM specification we needed to grind, chrome plate and finish grind the taper, kiss grind the rear housing shoulder, replace bearings, grippers, bellevilles, drawbar shaft, seals and orings.
The customers biggest concern was turn time. We quoted 2-3 week on the spindle rebuild. We were able to finish and ship the spindle within the 3 weeks that was required. This customer has always worked with us by providing information, prints, parts list and when necessary a long conversation on what issues they may be having and how NTE can be a part of fixing the issue.
This is the spindle totally broken down and set up for cause of failure evaluation. It is at this point in the repair process we determine why the spindle failed and what needs to be fixed to bring it back to OEM specifications.
This is the outer race of the rear roller bearing still mounted in the housing. Notice the cage has split in two and disintegrated. This was the ultimate cause of this spindles failure. Northland Tool replaces this roller bearing with a roller designed specifically for the high speeds this spindle achieves.
This is the rear roller bearing inner race and rollers still mounted on the shaft. When the roller cage disintegrates the rolling elements are no longer separated causing them to stack up upon each other and seize the spindle shaft.
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I really didn’t expect this; You guys really pulled it off! My many thanks to Sandy, Louis and your outstanding crew for helping us get back into production.
Lou all in all everything is running good. Just had a call from Sandy just the other day, its funny great minds think alike. Its great not to be sending spindles out on a regular basis since you addressed my problems, but I know they will still be coming sooner or later. Never a problem when we get them back , run better than new. Hope everything is ok there. Please tell everyone there that we here appreciate everything that you do to keep us up and running and the quick turnarounds. Have delt with the rest now deal with the best. Have a great week end and up and coming holiday.
Thank you Debbie just received spindle today and WOW ! what a nice job. Can’t wait to use it. Thank the Northland team for us for a job well done
Both of the spindles that you repaired are on the machines and running great. We don’t have any spares for those grinders. We probably will not be purchasing a spare, as you have been able to turn around the repairs quickly and the price of a spare is cost prohibitive.
I am writing to thank Northland Tool for going the extra mile and saving my company from expensive machine downtime and expensive repairs. We have always sent our Chiron spindles for repair as a shaft with bearings. None of our previous rebuilders pointed out the bearing fretting or the fact that the housing in the machine was out of tolerance and causing premature failure to the spindles. After Northland fixed the housings the spindles have never sounded as good or run as well! Great job guys!
The detailed cause of failure reports and the expert technical advice that Northland Tool provides is bar none the best I have ever seen. We struggled to keep two of our large our milling spindles running for longer than 6 to 12 months. Northland Tools evaluation showed that the hydraulic nuts were not holding the assembly together causing premature spindle failure. We discussed this in detail and mutually decided to modify the spindle shaft to prevent this from occurring again. The first spindle we performed this on is still in the machine running like new after 3 years. That’s over three times the life of previous repairs and it’s still going strong. Easily over $40,000.00 of savings so far on that one machine and counting.
Your people go above and beyond the call of duty when it comes to spindle repair. When we had difficulty with the spindle installation and we were able to talk directly to a spindle technician that helped us troubleshoot the issue it helped us out of a bind. We have sent several spindles to you and have nothing but great things to say.
Thank you for your attention with my quick turn spindle repair. Your status updates allowed me to plan around machine downtime and I now know that you deliver on your promises. In the past other spindle repair vendors talked a big game and consistently failed to deliver. You not only delivered my spindle before the due date but you kept me informed throughout the entire repair process.
You performed a miracle with my BIG PLUS spindle. After crashing the spindle severely damaging the taper we found that a replacement spindle was not only cost prohibitive but had a long delivery. Your repair was a fraction of the cost of new and you never would know that the spindle was damaged to the extent it was.
Catastrophic bearing failure was the main cause of this spindle malfunction
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