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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  • Okuma HF503 Spindle Repair

    Okuma HF503

    45,000 rpm 

    This is a 45,000 rpm ID grinding spindle. The customer sent it in claiming that the spindle was running hot and the amp draw was high. We tested the field upon incoming and it passed all critical testing. The spindle bearings were rough. We spoke with the customer and discovered that they had thought the spindle was a 60,000 rpm spindle. The spindle needed to have the bearings changed and we needed to make sure this spindle was put into the correct machine. We replaced all tags on the spindle and are making sure the customer is aware of the model number.



    Okuma Crown
    Okuma Crown

    Okuma Crown

    Both the front and rear roller bearings in this spindle failed catastrophically. We kiss ground the face on our Kellenburger grinder, assembled the spindle with new bearings and the machine was up and running within 3 days.


    Okuma MX 50
    Okuma MX 50

    Okuma MX 50

    5,000 rpm
    Stator driven
    This spindle was crashed damaging the taper and breaking off a drive dog.
    We fixed the drive dog, ground plate ground the taper, and brought the spindle back to factory specifications. This saved our customer from having to purchase a new spindle for many times the cost of the repair.


    Okuma MC 5
    Okuma MC 5

    Okuma MC 5

    This spindle had coolant contamination to the front bearings that washed the grease lubrication from the raceways.  We reviewed the machining process with our customer and working together we determined the best plan of action to increase their spindle life.


    Okuma HF 802
    Okuma HF 802

    Okuma HF 802

    80,000 rpm
    Oil mist lubricated
    Northland Tool & Electronics has the housings to run this type of Okuma. We can duplicate the way it is run in the machine.
    High speed ID grinding spindles are subjected to many factors that decrease their lifespan. Speed, contamination, overloading and crashes to name a few. We can work with you to give you a better understanding of these factors and what you can and can not control.


    Okuma MX50 HA Spindle Repair

    One of our customers was experiencing chatter on the parts manufactured in their Okuma MX50 HA. They could not afford downtime but the parts were becoming unacceptable. They pulled the spindle on Thursday afternoon and we received it late in the day. We evaluated the cause of failure and what work needed to be done to fully repair the spindle. We dedicated a technician to the repair and we were able to have the spindle repair completed by early Friday afternoon. The Okuma technician was able to install the spindle Friday before the end of the workday.

    The repair was done in less than 24 hours and the machine was making parts in a little over 24 hours.