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Why is spindle motor repair so hard?

2022-11-08 11:00:05

Like all motors, spindle motors can have problems during use. But it will be more difficult to repair the spindle motor, why does this happen? Combined with previous feedback, there are roughly three reasons as follows.

  1. High-speed precautions
  2. Spindle motors rotate at very high speeds, so many components within the motor must be manufactured to be more durable and designed within very tight tolerances.
  3. Balance
  4. While proper rotor balancing is important for any motor application, this is especially true on spindles. Vibration caused by rotor imbalance can cause tool damage, motor overheating, or damage to the entire spindle. This is why the spindle rotor must be balanced within very tight specifications after every repair.
  5. Precision Machining
  6. Many spindle motor repairs involve some kind of mechanical damage. Whether it's correcting a worn bearing journal, cutting a keyway, or repairing a damaged machine job on a tool holder, these repairs are often done. Problems with any step can lead to spindle motor failure, so all machine work must be carefully measured.

What is a spindle motor?

The spindle motor is also called a high-speed motor, which refers to an AC motor with a speed of more than 10,000 rpm. Mainly used in wood, aluminum, stone, hardware, glass, PVC, and other industries. Spindle motors have the advantages of high speed, small size, lightweight, low noise, and low vibration, and are increasingly valued and applied by related industries.

The principle of spindle motors

Spindle motors obtain various speeds by transforming the frequency and excitation voltage of the current input to the stator winding of the motor. Since the direction of the rotating magnetic field of the motor depends on the phase sequence of the three-phase alternating current input to the stator, changing the phase sequence of the input current of the motorized spindle can change the rotation direction of the motorized spindle.


Compared with traditional motors, spindle motors have many advantages, but they also encounter problems during use. If you encounter any problems, please feel free to contact us, and we will have professional staff to solve your problems.

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