Stama NN3011-234411-40M, 5100 RPM, grease lubrication, coupling driven
This spindle came to us from an automotive brake system manufacturer because it was faulting out the drive. Small wonder, as we could feel that the bearings were obviously in very poor condition when rotated by hand in assembly incoming. Upon disassembly, we discovered that the grease in the bearings was severely degraded from contamination with a fine black particulate, especially in the front of the spindle.
Fortunately for our customer, we did not find any significant dimensional deviations of the shaft or housing. We proceeded to rebuild the spindle with all new bearings, HSK gripper seal, o-rings and assembly screws. We finished this straight rebuild with our final test run, break-in and final QC. This spindle was one of four that were sent to us at once. Only one of the four required any dimensional work, a grind, chrome plate & finish grind to correct excessive runout in the HSK63 taper.
Does your spindle need repair? GET A QUOTE TODAY
12,000 rpm – This Akira Seiki spindle was sent in from an aerospace defense company. They were having finish problems and need to hold tight tolerances. The rear bearings had failed due to coolant c [...]
3600 rpm This spindle failed by reaching the end of the bearing life. It had been in the machine for 15 years. We rebuilt it and it will go for another 15 years. [...]
This spindle served its time well. Eventually it did wear out and contamination caused front bearing failure. Due to its years of service we found fretting of the front housing & front shaft journ [...]
100,000 rpm Oil Mist Lubrication The tool to this spindle was broken off inside the pilot. After we extracted the remaining tooling we found the front bearing shoulder had 12 microns of run ou [...]
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
Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication…