Our Blog - See Examples of Spindles We've Repaired

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Welcome to our blog. Here, you'll find examples of spindles we've repaired in the past. We explain what was wrong, have images, videos and more. If you're looking for more specific brand information, or can't find a brand click here, or try the "brands" link above.

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  • Setco Spindle Repair

    Setco Spindle Repair

    3,600 RPM

    We received this spindle partially taken apart. After cleaning and inspecting we determined that the shaft taper had 3 microns runout and needed a kiss grind. The front shoulder had 10 microns runout and also needed a kiss grind. We replaced the bearings, adjusted preload, balanced, assembled and test ran the spindle. The spindle was then thoroughly checked in our QC department and shipped back to the customer.



    Milltronics VM17

    Milltronics VM17 Spindle Repair

    This is a spindle made by Setco for a Milltronics machine. The #3 bearing of the front tri-set failed. The manufacturer or the previous rebuilder did not set the spacers correctly for the front bearing set. They had the spacers set for a much heavier preload than the speed of the spindle would allow. This caused heat and premature bearing wear that eventually lead to the failure of the spindle assembly. The taper also had 8 microns of run out.

    Northland Tool kiss ground the taper and reworked the spacers to give the front tri-set of bearings the proper preload. We assembled the spindle and test ran it on our test stand at the top operational speed of 8000 rpm. 



    Setco 4003Y
    Setco 4003Y

    Setco 4003Y

    3,500 rpm
    Thread repair
    Our customer runs several of these spindles and has been for decades. Eventually the threads for the tool holder wear out. We are able to fix this problem for them with out the cost of manufacturing a new shaft. This can be done on  most spindle models. It is a fairly common problem on surface grinding spindles.


    Setco 4204BY

    Setco 4204BY

     Setco 4204BY

    10,000 rpm

    Spindle was contaminated with coolant. We reviewed the air purge specifications with our customer and found that they were not set properly on the machine. We repaired the spindle gave the technical assistance needed for the air purge and this should result in a long cycle life of the spindle.



    Setco Spindle

    Setco Spindle

    Setco Spindle

    We repair all types of Setco spindles. This spindle was being used in an application where the machine would run for 2 months then have no production for 4 months. The spindles were getting contaminated with liquid coolant and when they would start the machines back up after the shut down the spindles would not function properly. We implemented a better seal design and relayed some helpful tips to the customer to help prevent the continuous failures.



    Setco Block Spindle
    Setco Block Spindle

    Setco Block Spindle

    3600 rpm
    Used for the manufacture of drill bits this spindle is subjected to large amounts of oil splashing on the front of the spindle. The primary cause of failure was coolant contamination. We worked with our customer and through our spindle care training program were able to reduce their spindle repair expenditures by 53%.