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How GTI Repairs All Kessler Spindles

For many manufacturers, Kessler spindles are the heart of their business. We know because Kessler spindle repair is the heart of ours. That is why we have taken the time to master the skills and tools necessary to resolve any Kessler spindle problem quickly and efficiently. Our procedures for machine tool spindle failure analysis, spindle calibration, and spindle testing are part of what makes us one of the largest spindle repair specialists in the country. We strive to reduce your downtime and ensure your spindle runs better than it did when it was new.

Contact and Intake

At GTI we have live support staff taking customer calls 24 hours a day, 7 days a week. With our three state-of-the-art facilities in the U.S., you can save on shipping time and cost, and in some cases, we can perform the spindle repair at your location. We are diligent about tracking all new arrivals so you can stay on top of your spindle’s progress throughout the repair process.

Disassembly, Cleaning, & Inspection

As we disassemble the spindle, we search for signs of contamination, lack of lubrication, support equipment failure, misuse, or anything unusual. We clean all disassembled parts and conduct numerous tests to see how the Kessler spindle compares to the OEM specifications. We check the run-out, alignment, optimal tolerance levels for housing bores, as well as shaft journals and parallelism. We inspect the bearings for preload, contamination, overloading, fretting, overheating, and make a recommendation for replacing your bearings to extend spindle life and improve performance. We search for the origin of the failure, to fix it correctly, and to provide you with a detailed guide to prevent the issue in the future.

Machining, Grinding, & Balancing

If necessary, we can change worn out Kessler spindle components with custom built replacement components in our on-site machine shop. This allows us to get your part fixed faster without having to rely on the OEM, saving you valuable time and money. We also do our own in-house grinding and have a climate-controlled space, where we can grind to precision run outs with tolerances of 0.0001 or better. We use our state-of-the-art balancing technology, developed by GTI Predictive Technology, to 2 stage balance all spindles that we rebuild. We will component balance and then perform final trim balance at maximum RPM to achieve the lowest unbalance and vibration levels possible.

Reassembling & Testing

We put it all back together with new bearings, seals, O-rings, spacers, Belleville washers, and any other reworked components in our controlled assembly area to prevent contamination. Once reassembled, we run extensive tests covering runout, temperature, and vibration from 0 RPM to the maximum speed. We will then continue to test run at maximum RPM until we feel confident that your Kessler spindle is performing optimally—which is often better than when it was new. Final vibration tests will read at .0395 overall velocity and the displacement specs will meet the recommended ISO grade scale.

Final QC and Return

Every Kessler spindle that we rebuild is then put through a redundant final QC process by an independent technician to ensure that all of our rebuild processes and specifications have been achieved or exceeded. We paint and pack your newly repaired spindle in non-corrosive packing material and encase it in foam. It gets shipped to you in either a heavy-duty shipping box or a custom-built wooden crate to ensure a safe return to your facility. When you unpack your Kessler spindle, you’ll not only be pleased with how it looks, but you’ll be amazed at how well it performs.

About GTI Spindle Technology

At GTI Spindle Technology, we specialize in high-quality spindle diagnosis and repair. Getting your business back into full operation and minimizing downtime is our mission. We offer in-house, on-site, and emergency assistance for machine tool spindle failure analysis, spindle repair, and complete spindle testing. With an extensive range and expertise in a diverse group of industries, our customers know that they are getting the highest quality of spindle repair and customer service. Click here to find out more.