Haas TL-4 Spindle Repair


The Haas TL-4 is a large-bore, flat bed lathe.  It is commonly used in the oil field industry due to its large chuck diameter and bar capacity.  The spindle alone weighs an astonishing 5,000 lbs and was quite a feat to repair.


Our customer delivered this spindle to Northland Tool with complaints that it was very noisy during operation. Right away during our incoming inspection, we noted that the OD taper and face of the spindle measured with high runout. Our technician also noted that spindle sounded very loud when spun by hand.  After a complete disassembly and evaluation, we reported back to the customer that there was heavy oil contamination in the front rolling elements. The oil was noted to be very dark in color. Some of the roller cages in the front and rear were broken as well, causing a few rolling elements to fall out of place.  Lastly, metal shavings were present inside the housing.


This Haas TL-4 spindle turned out to not have any dimensional deviations and therefore only required replacement of the bearings and wear parts.  Due to the large diameter of these bearings they were somewhat difficult to source.  We were originally quoted a  16-week lead time from China, however we got lucky and were notified that the bearings would arrive after only 8 weeks.


After reassembly of all components and adjusting bearing preload, the spindle was put through our extensive break-in and testing procedures.  This spindle passed our final quality inspection before being returned to our customer with a 1-year warranty.  The customer was happy to have their spindle back up and running after 8-weeks of being down and reported it to still be running like new well after the repair.


  • DSCF8272-spindle

    Spindle interior contained metal chips

  • Haas-TL-4-bearing-removal-spindle

    Bearings prior to being removed from spindle with missing rolling elements

  • haas-tl-4-breakdown-spindle

    Breakdown complete

  • haas-tl-4-complete-spindle

    Finished rebuild, complete with a new coat of paint

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More Case Studies

Repair History - Here are examples of similar spindle repairs that may contain additional information that will help you. If you have additional questions, please contact us.

I really didn’t expect this; You guys really pulled it off! My many thanks to your outstanding crew for helping us get back into production.
— Dan Eaton, Taylor Metalworks
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.
— Northland Customer
Thank you NTE 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 
— Northland Customer
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.
— Northland Customer
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!
— Northland Customer
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.
— Northland Customer
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.
— Northland Customer
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.
— Northland Customer
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.
— Northland Customer
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