CNC Spindle Rebuilds

Serving clients throughout North America, Superior Spindle is proud to provide precision CNC spindle rebuild and design upgrade services. No matter the problem, we’re here to help you restore your CNC machine with minimal downtime. 

The spindle is a key mechanical component of the CNC that is designed for rotary motion. As an integral part of the CNC machine, the spindle does a lot of the work and can experience quite a bit of wear and tear. If you’ve noticed damage or signs of failure in your spindle, contact us today to request a free evaluation. Our ISO-certified team will let you know whether a full rebuild, repair, or replacement is best for your situation.

What Is a CNC Spindle Rebuild?

spindle rebuilding

A CNC spindle rebuild is a process that involves replacing all or most components of the spindle, including bearings, O-rings, and preload collars. Every rebuild is done in our HEPA cleanroom to prevent contamination, and we can even help you upgrade your spindle’s existing design. All new components are guaranteed to meet or exceed OEM specifications.



Spindle Repair Versus Spindle Rebuild

Spindle being tested

In a repair, our team is only replacing or fixing components that were damaged.

In a complete rebuild, we are replacing or upgrading all or most components to ensure your spindle functions like-new. In some cases, a rebuild is required to ensure complete efficiency.

Whether we complete a repair or a rebuild, we guarantee high-quality service with minimal downtime.

Benefits of a Spindle Rebuild

  • Restored Factory Original Performance
  • Affordable Alternative to Complete Replacement
  • Improved Cycle Time
  • Long-Lasting Components

Our Facility

Superior Spindle's facility filled with blue testing equipment. a Makino spindle sits in the center of the photo, held in place on a test stand

Unlike many of our competitors, we do not have to outsource repairs and rebuilds to third-parties.

Our state-of-the-art facility is equipped to handle CNC spindle rebuilds from start to finish.

We have our own balancing department, electronics department, HEPA climate-controlled cleanrooms, and on-site warehousing to provide unparalleled service to our customers. 

Our CNC Spindle Rebuild Process

Our entire CNC spindle rebuild process normally takes around 10 to 14 business days. If this timeline is too slow, ask about our expedited/emergency services.

Our repair process is as follows:

cnc spindle rebuild

1. Inspect, Analyze, & Document the Condition of the Spindle as It Was Received

Once the spindle is unpacked, it is subjected to a cleaning, inspection, and analysis. Our technicians pre-test each spindle for vibration, pull force, run out, air purge flow, and other aspects to determine the inefficiencies affecting your CNC machine.

After the pre-test, our technicians fully disassemble your spindle in our HEPA Class 10,000 cleanroom and take photos of each component. 

After our technicians complete this evaluation, a failure analysis report (FAR) is prepared. This report, complete with pictures and computer-generated analytical graphs, shows the damage that the spindle has sustained. It also includes a detailed list of what it will take to rebuild or repair the spindles. This list is the basis for the quote and estimated time to repair.

2. Acquire, Manufacture, & Repair All Parts Required for Assembly

We use our comprehensive inventory to source the best OEM replacement components for your spindle. Any component that doesn’t need to be replaced is thoroughly cleaned and lubricated before assembly. Additionally, as part of the rebuild process, we look for ways to improve product quality and cycle time to create optimal tolerances.

Our in-house capabilities include:

  • Machining to Tolerances of 1 Micron
  • Bearing Repair
  • Vibration Analysis
  • Spindle Balancing
  • Electronics Analysis & Repair

3. Assemble the Spindle Components in a Class 10,000 HEPA Cleanroom

Any dirt that is introduced at assembly time could substantially shorten a spindle’s operating life. We virtually eliminate this problem by assembling each spindle in one of our two cleanrooms.

4. Test the Spindle in a Run-in Test

Once the assembly is complete, the spindle undergoes a run-in test. In this step, the spindle is run the way you would run it on your equipment. It’s at this point that last minute fine-tuning and balancing would be performed.

5. Prepare a Final Report

This report describes the key metrics and operating characteristics of the spindle after it has been rebuilt. It should show your spindle to be as good as or better than new. It will also carry the same warranty that it had when it was new.

Industries We Work With

We work with a variety of manufacturers throughout North America, and we take pride in providing each industry with the spindle redesign and rebuilding services they need to thrive. We realize each industry is unique, and that is why we never use a one-size-fits-all process. Our company works with the following types of industries:

  • Automotive
  • Mold Manufacturing
  • Agriculture
  • Aerospace
  • Heavy Construction
  • Medical
  • Defense
  • Appliance
  • Optical

Let Us Help You Rebuild Your Spindle

Few companies can provide the same range of services and level of quality as Superior Spindle. No matter what issue you’re dealing with, our top priority is giving you a spindle that works like new. If you have questions about our ISO-certified CNC spindle rebuild process or design upgrade capabilities, please call (734) 224-4778 or fill out our online form today.


State of the Art Services, Superior Spindle can resolve all of your Spindle Repair and Remanufacturing requirements.

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