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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  • Mazak QT6 Rush Spindle Rebuild

    Mazak QT6 Rush Spindle Repair

    Mazak QT6 Rush Spindle Repair

    7,000 rpm

    We received this spindle from our customer late morning on Wednesday. It was broken down and evaluated by mid afternoon on Wednesday. We spoke to our customer about the repair, what was needed and the options they had. The spindle was approved late Wednesday.

    By Thursday morning the spindle had been completely cleaned and ready for assembly in our clean room. By late Thursday afternoon the spindle was assembled and running on one of our test stands.

    Our customer picked up the spindle early Friday morning and their Mazak machine was making parts by days end.

    This was the first spindle we had done for this customer and the repair was treated with the urgency required for the situation. If you are in need of fast turnaround times on a spindle rebuild please call one of our staff to discuss the repair. We will always do everything possible to get you up and running.



    Matsuura RA3

    Matsuura RA3 Spindle Repair

    10,000 rpm

    RUSH REPAIR

    This spindle had oil contamination in the front bearings causing them to overheat and fail. The taper was also worn and had run out. Our customer requested a rush repair as this machine was intricate to his production. We were able to kiss grind the 40 taper on our Kellenburger ID/OD grinder and assemble the spindle with bearings taken from our stock. Having our own grinding department on site makes fast turn repairs like this possible.

    Visit Our Matsuura Page Here



    Toshiba BP130

    Toshiba BP130 Spindle Repair

    We supply bearings for this customer that they keep in stock for this Toshiba Boring Mill. When they perform a machine refurbishment we are able to rebuild the spindle assembly in just a few days. This limits the machine downtime to less than a week and allows them to keep the flow of work through this department at a steady rate. They will call us when they are ready to recondition the next machine and Northland Tool reserves time in our assembly department for exclusively for them. As this is such a key piece of equipment for them we are on call during the process 24 hours a day to answer any questions their personnel may have.



    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. 



    Okuma Howa 438 Spindle

    10,000 rpm

    Grease lubricated

    The main cause of failure for this spindle was rear bearing failure. When the rear bearing failed the encoder sensor was damaged. The 40 taper had run out and needed a kiss grind. The drawbar was worn where the belleville washers sit and needed to be reconditioned to insure proper drawbar actuation.

    Northland Tool replaced the sensor, kiss ground the taper , reworked the drawbar and rebuilt the spindle. During the installation process we stayed in close contact with the installation personnel to make sure everything went smoothly.



    Mori Seiki SH40Mori Seiki SH40

    The taper of this spindle had build up causing tool run out. The front bearings were contaminated and the front housing was over sized. All these factors contributed to bad part finish that eventually lead to our customer to send the spindle to Northland Tool for repair.

    We ground plate ground the front housing and the 40 taper in our grinding department. The spindle was then assemble in our clean room. The final quality test showed less than 2 microns repeatable run out on a 12 inch test bar over multiple tool changes. This was exactly what our customer needed for his process. View Our Mori Seiki Spindle Repair Page Here.

    If you would like more information please call us at 800-774-6353 or CLICK HERE.



    Mazak VTC200B
    Mazak VTC200B

    Mazak VTC200B

    12,000 rpm
    40 taper
    Oil Mist Lubrication
    This customer has multiple Mazak VTC200B machines in their facility that were experiencing frequent spindle failures. We disassembled the first spindle and found that the design was very poor. The nut for the rear bearings was hydraulic and had the long shaft that attaches to the drive motor bolted to it. The problem with this setup occurs if there is any misalignment with the drive motor, any vibration in the drive motor or if any number of ground surfaces are not virtually perfect. Any flaws in these areas subjects stress directly to the rear bearing causing premature failure. To compound these issues the drawbar system that requires significant forces to function is included in this assembly.
    We discussed these findings with our customer and mutually decided the best course of action was to replace the shaft, hydraulic nut and drive motor tube. This was the only way to insure proper fits and run outs. Special care will also need to be taken during the installation process to insure proper alignment and balance.   


    Matsuura 800VA
    Matsuura 800VA

    Matsuura 800VA

    Before using Northland Tool & Electronics our customer was using the OEM for his spindle repairs. This was a costly route to go for two reasons. The first being the inflated cost of the repair itself, the second being the OEM insisted our customer pay to have them install the spindles. Our customer has the knowledge, ability and staff to maintain their machines and was tired of being forced to pay far to much to the OEM. We discussed our repair programs with them and determined we would be a good option to replace the OEM. Our one year warranty covers our repair regardless of who installs the spindle. Visit Our Matsuura Page Here



    Dynamatronics
    Dynamatronics

    Dynamatronics

    6,000 rpm
    Grease Lubricated
    The front bearings failed from coolant contamination. The coolant entered through the front labyrinth system and washed the grease from the bearings. We gave the contamination prevention options that were available at this time to our customer and they decided on the option that worked best for them.  The taper had run out and poor contact so we kiss ground it. This spindle also received a full drawbar rebuild.


    Mori Seiki NV5000
    Mori Seiki NV5000

    Mori Seiki NV5000

    BIG PLUS Taper
    12,000 rpm
    This spindle was crashed causing damage to the front bearings and the BIG PLUS taper. We needed to grind plate grind the taper to bring it back to manufacturers specifications.
    Our final QC showed we had less than 2 microns run out on a 13 inch BIG PLUS test bar that repeated over 20 tool changes. The only way to achieve this type of accuracy is to have all the required BIG PLUS test tooling and a close working relationship with BIG PLUS.
    Our competition claims to be able to repair BIG PLUS spindles. However, recently we have found several spindles we have had to rebuild after our competition has worked on them because they really have no understanding of the tooling interface and they are not equipped to test the tooling interface. If you need your BIG PLUS spindle repaired always ask the rebuilder if they are certified and for proof they posses the proper test tooling. You will save yourself a lot of aggravation. View Our Mori Seiki Spindle Repair Page Here.


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