We offer Mazak live tool repair services for all Mazak precision tools. Our repairs will typically cost 1/2, or less than 1/2 the price of a new live tool. Plus, we can upgrade the original non-sealed bearing design, to a sealed / shielded bearing design at all bearing locations. We keep bearings in stock for these live tools to allow us to keep pace with our repair volume. Lead-time can be as short as 2-3 days.
- Most live tools exceeding 0.001″ runout are due, or almost due, for a repair. 0.0008″ or less is the target runout for a live tool.
- Live tools like to rest as long as they cycle at full speed or maximum load. 5 minutes is a typical maximum run time followed by a 5 minute rest.
- 150 to 160F temperatures are common when running at full load.
- Disassembled and cleaned.
- Inspected dimensionally and visually.
- Quoted for repair.
- The spindles are assembled with new precision grade sealed / shielded bearings.
- If necessary, the spindle is ground to true the taper, and / or the bearing journals are plated and re-ground to proper bearing tolerance and total indicated runout.
- As required, the lower, middle and upper bearing housings may be bored, bushed, and reground to proper concentricity and dimensional tolerance.
- The spindles are re-assembled.
- The spindles are installed in the housing.
- The unit is run tested for 5-10 hours with testing of vibration, temperature, and noise levels
Why should you have your multi-spindle boring head, high speed right angle head, or other aggregate head, repaired by Ekstrom-Carlson?
- Lead-time: 1-2 Week average for multi-spindle heads, including tear down, inspection, quotation, and repair. 3-5 days for right angle heads and live tooling repairs.
- Price: Much lower price than the OEM, or the OEM distributor.
- USA repair: We repair the unit in Rockford, Illinois. It is not shipped overseas, as is often the case for various machines.
- Parts repair: Where possible, we will save money by repairing motor spindles and gear spindle shafts. Some manufacturer’s representatives will always quote a brand new unit if the unit drive shaft is damaged, or if the bearings require replacement. 75% of the time, we can save the original unit at less than 50% the cost of new.
- Sealed bearings when available and possible conversion to ceramic bearings.
- Free inspections.
- The condition of the machine before the rebuild along with accurately diagnosing any and all problems.
- Installing proper replacement parts including spindle grade bearings and parts with OEM tolerances that are known only to OEM’s such as Ekstrom-Carlson.
- Precision tolerance machinery and tooling including grinding, plating and balancing equipment.
- Experience and quality workmanship of the repair technician.
Live Tool Repair • Case Studies
Manufacturer: UNKNOWN Part Number: 420525012-40
SPINDLE Repair QUICKFLEX ROTATING SPINDLE ADAPTER 420525012-40 Published: 07/08/26 09:21AM This German-made QuickFlex® rotating spindle adapter is built for precision power transmission and controlled rotary motion in demanding machinery. Ekstrom Carlson provides complete evaluation and restoration services to return units like the 420525012-40 to stable, production-capable performance. From detailed inspection through final run testing, we focus on eliminating vibration, improving ... Read More
Manufacturer: WTO Part Number: 420125013-40
SPINDLE Repair WTO 420125013-40 SPINDLE Published: 07/08/26 09:00AM Ekstrom Carlson provides precision evaluation and restoration services for the WTO 420125013-40 spindle used in machining applications. Our focus is on returning your spindle to stable, repeatable performance with controlled runout and dependable operation. From detailed teardown through final validation, we help you extend spindle life and reduce unplanned downtime. Each serviced ... Read More
Manufacturer: HSD Part Number: ES 989A-AP-13.5KW-H1
SPINDLE Repair HSD ES 989A-AP-13.5KW-H1 Published: 06/23/26 10:27AM Experience unmatched performance with the HSD ES 989A-AP-13.5KW-H1 high-speed spindle motor. Designed for precision and reliability, it ensures optimal output in demanding industrial applications. Performance You Can See Achieve a maximum of 24000 RPM for superior machining precision. Reliability You Can Trust Our meticulous rebuild process guarantees consistent, high-quality operation. PRODUCT OVERVIEW ... Read More
Manufacturer: Hardinge Inc. Part Number: CC000014404
SPINDLE Repair HARDINGE INC. CC000014404 Published: 06/23/26 10:20AM At Ekstrom Carlson, we specialize in the evaluation and repair of high-performance spindles like the Hardinge Inc. CC000014404. Our expert team ensures your spindle operates at its full 8000 RPM capacity, minimizing downtime and maximizing productivity. Performance You Can See Our precise diagnostics and rebuilds ensure optimal rotation at 8000 RPM. Reliability ... Read More
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SPINDLE Repair EPPINGER T.9735.208 Published: 06/23/26 10:09AM The Eppinger T.9735.208 spindle is a crucial component in high-performance machining applications. At Ekstrom Carlson, we specialize in evaluating and restoring these spindles to their optimal operational state. Our services ensure minimal downtime and maximum productivity for your machining needs. Performance You Can See Experience enhanced machining precision and stability with our expert ... Read More
Manufacturer: HSD Part Number: ES 988A-AP-13.50KW-H1
SPINDLE Repair HSD ES 988A-AP-13.50KW-H1 Published: 06/22/26 03:43PM Experience the high-speed capabilities of the HSD ES 988A-AP-13.50KW-H1 spindle motor. Designed for demanding applications, this spindle offers exceptional power and efficiency at 24,000 RPM, ensuring optimal performance in industrial settings. Performance You Can See With a peak RPM of 24,000, this spindle motor ensures precise machining results. Reliability You Can Trust ... Read More
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EC PART Repair undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined Manufacturer I'm sorry, I need the analysis text to extract the MANUFACTURER and PART NUMBER. Could you please provide the text? undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined ... Read More
Manufacturer: Ekstrom CarlsonPart Number: SM2-C-78
EC PART Repair EKSTROM CARLSON SM2-C78 Published: 06/19/26 01:37PM Our SM2-C78 tool spindle is engineered for high RPM applications, delivering exceptional performance and reliability. Built by Ekstrom Carlson, this spindle offers the precision and durability needed for demanding industrial environments. Performance You Can See Achieve optimal rotation stability with our spindle's 18000 RPM capacity. Reliability You Can Trust Each unit ... Read More
Manufacturer: Ekstrom Carlson Part Number: SM2-CT7
EC PART Repair EKSTROM CARLSON SM2-CT7 Published: 06/19/26 01:34PM The SM2-CT7, built by Ekstrom Carlson, exemplifies our commitment to precision machining. Designed for high-performance applications, this rotary powered tool operates at speeds up to 18,000 RPM, ensuring consistent and reliable results in demanding environments. Performance You Can See Achieve optimal machining with speeds reaching 18,000 RPM. Reliability You Can Trust ... Read More
Manufacturer: Ekstrom Carlson Part Number: GRO252-1-608
UMBRA GROUP UMBRA GROUP GRO252-1-608 Published: 06/19/26 01:28PM The Umbra Group GRO252-1-608 is a high-speed spindle motor designed for CNC applications. Ekstrom Carlson specializes in repairing and reconditioning these spindle motors, restoring each unit to the precision and reliability demanded by modern manufacturing environments. Performance You Can See Achieve up to 32,000 RPM with consistent output for precise machining. Reliability ... Read More