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Home ›  Servo Motor Repair ›  Fanuc AC Spindle Motor Repair

Fanuc AC Spindle Motor Repair

Certified Pricing

Nationwide Service

We repair and ship nationwide. It's fast, and costs less than you think.

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If You're Having Issues with a Fanuc Spindle Motor, We Can Help Today!


Ready to get a servo-spindle repaired? Repair Now

If your process is being stalled by a faulty Fanuc spindle, send to us and we can quickly diagnose the issues you are having through a myriad of testing procedures.
We test the ohms with a Megger tester to see if the stator is good or is grounded.
During disassembly:

  • The fan assembly is then taken apart; the fan motor is surge tested to check the strength of the insulation.
  • We check the gap of the speed sensor
  • We test the off-set
  • Using a digital oscilloscope, the amplitude is measured.
  • We then remove the speed sensor wheel by applying heat, along with opposite pulley end bell.
  • The rotor is removed from the stator – and the bad bearings removed.

  • The technician visually inspects the motor windings, and the bore of the stator for obvious trouble spots.  The stator is then surge tested as well, where all 3 phases are tested for dielectric strength of the insulation.  

    The entire unit is washed thoroughly using both a high-pressure sprayer and a parts washing machine, removing all contamination that had built up.  It is then baked over-night in our oven.

    During assembly, new bearings are installed; the stator is megged again after the wash and bake; rotor is put into place; motor housing and end bell are installed.  Final testing occurs as amplitude is measured again.  

    Next, the spindle is connected to a Fanuc amplifier and ran in both directions, stopping and starting multiple times until testing is completed.  The speed sensor is tested for proper specs after assembly as well.


    Watch Fanuc AC Spindle Motor Repair video

    All Fanuc AC spindle motors sent to us receive rigorous testing to ensure key individual components operate at industry standards. In addition, we use Fanuc OEM parts in our repairs and every step of the process—from machining to winding—is completed in-house.

    Afterwards, the spindle is reassembled and given a final run test. It is then carefully packaged for shipment so that it safely arrives at your door ready to go.

    At Repair Zone we take pride in every step of the service, which is why we back our repair work with a full, one year warranty.

    Our repairs average 70% less than buying new.

    Get Help Now! Repair Now

    Browse our Spindle Motors for repair, exchange, or purchase.

    For a precise quote and a fast turnaround, Get a repair slip

    Would you rather talk to a tech? Call us at 989-922-0043 and we would be happy to help!


    Watch Our AC Spindle Motor Repair video


    Watch Fanuc Spindle Amplifier Repair Process at Repair Zone

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615 Andre St
Bay City, MI 48706
Phone: 989-922-0043
Owned and Operated By York Repair, Inc.
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