We received this spindle with a complaint that the spindle had play in the bearings and it made noise. Upon evaluation of the spindle it was found that the inner bearing spacer had been manufactured larger than the outer shoulder of the housing causing the spindle bearings to have no preload. The V ring seal made very little contact. Once the seal wore it would no longer made contact after a short period of operation. The front shaft journal was undersized by -12/-16, ISO at +/-5. The shaft taper and face both had high run out.
The customer was made aware of the issue and due to the fact that the customer was down they opted for an expedited rebuild. We would grind, chrome plate and finish grind the front shaft journal, kiss the shaft taper and face. We manufactured new spacers to increase pressure and upgraded the v-ring seals to Viton. The spindle was assembled and the spindle was balanced and test run for 6 hours.
Outgoing report shows that the spindle does not have play in the bearings. The last time we spoke with our customer they were very happy with the spindle and the information we had provided regarding the issue.
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150,000 rpm ID grinding spindle When you rebuild a 150,000 rpm spindle there is no room for error. Northland Tool & Electronics is able to rebuild these spindles to the origina [...]
This was a straight repair, meaning no dimensional work needed to be done. The lead time on these types of repairs are usually 5-10 business days. We do offer an expedited option to accommodate yo [...]
35,000 RPM We received this Ibag spindle because the customer removed the set screw that held the field in place. By removing the screw and powering it up the field spun causing one of the wire [...]
3000 rpm - Fanuc Driven One of our aerospace customers sent us this spindle because it had been repaired by another vendor but they were not satisfied with the spindles performance when they i [...]
Voumard VMX120 Spindle Rebuild This spindle had catastrophic rear bearing failure. The picture below shows the rear bearings (to the right) got extremely hot. The rear housing was egg shaped which m [...]
Possible cause of failure: Bearings 1-4 failed from contamination and fatigue from use, more in the #3 and #4 bearings. We received a quill, but no drive pulley or pulley retention screw. The cus [...]
28,000 RPM This is a good example of a straight spindle repair. We received this spindle, broke it down, cleaned and the inspected the overall dimensions. We replaced the bearings, adjusted the prelo [...]
45,000 rpm ID grinding spindle This spindle was crashed causing damage to the front bearing journal and the ID tooling pilot. It was necessary to grind plate grind the front journal and the pi [...]
5,000 RPM There were a few things that needed repair on this spindle. The grease was washed out of the front bearings. The grippers were missing so we replaced those. A housing rod had bent thr [...]
42,000 rpm This spindle came from a customer that we have worked with extensively to develop a repair program that fits their needs. They have an inventory of spare spindles on hand but did not [...]
This spindle came to us and was needed back at the customers ASAP. We disassembled and inspected the spindle. All critical spindle components passed quality control inspections except the taper th [...]
60,000 rpm ID Grinding spindle Front bearing failure causing the inner race of the bearing to spin on the shaft. Northland Tool ground plate ground the front bearing journal to OEM specifications. [...]
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…