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A DOOSAN spindle arrived for service after a severe collision with the 5-axis table. The symptoms were clear: noisy bearings and high radial runout, which prevented stable machining. In this kind of machine everything is decided at very small values — every micron counts

From the start we agreed with the customer on a fast approach. After disassembly at the customer’s site, we collected the spindle directly, door-to-door to shorten downtime and avoid additional transport risk. The maintenance department on the customer’s side did a great job: quick decision, tidy workstation, complete incident information. Thanks to that we could get to work immediately.

The spindle in the HAAS VM-2 operates at high speeds and loads, where every micron matters for surface quality, tool life and process stability. In this job the goal was a full HAAS spindle repair with restoration of the SK40 taper geometry and achieving the lowest possible runout at an L-300 test length. After completion we confirmed runout below 2 µm on the test bar and 1–2 µm directly on the taper—values typical of a premium, like-new spindle.

Two spindles from the renowned CHIRON brand, operating in machines from the same manufacturer and equipped with HSK 63A tapers, arrived at our service center. These components are crucial for maintaining the highest machining quality – responsible for transmitting torque to the tool and ensuring stability during cutting. In both cases, the customer reported clear signs of wear that negatively affected production: increased noise, noticeable vibrations and a drop in dimensional accuracy of machined parts.

An HOMAG SKF electrospindle, mounted in a Weeke Venture 1M CNC machine used for daily furniture production, arrived at our service center. The customer reported clear signs of spindle degradation: increased noise, noticeable vibrations, and lower machining quality. Due to a tight production schedule and high precision requirements, quick and effective action was essential.

Two electrospindles from the renowned Italian brand GIORDANO COLOMBO arrived at our service center, equipped with ER32 threads and designed for manual tool change. Both spindles showed similar symptoms – noise during operation, noticeable vibrations, and excessive housing temperature. The nominal speed of these units is 18,000 rpm, and precise operation was essential for the machining processes they supported.

At our service center, we had the opportunity to restore full functionality to a WEINIG spindle that arrived with a severely damaged HSK 63F taper. The failure was so critical that it prevented tool release — the tool got jammed in the taper, and all disassembly attempts were unsuccessful.

Our service received the HITECO QX-2 11/12 24 63F NC electrospindle, used in a five-axis CNC machining center. The unit, operating at 24,000 rpm with an HSK63F taper, showed signs of instability and system communication errors that made further operation impossible.

Our CNC service received as many as three HSD ES 959L electrospindles designated for operation in a machining center ROVER B. Two of them were sent as damaged units, while the third one was marked by another service as “beyond repair” and intended as a donor for spare parts.

An extremely damaged GMN spindle arrived at our service center, with the SK40 taper severely worn due to prolonged use without prior servicing. The spindle underwent a full overhaul process – from disassembly and diagnostics to component repairs, followed by final testing and dynamic balancing.

The HSD ES 919 electrospindle was delivered to our service center with urgent need for repair due to bearing system failure and damaged sensors. The entire regeneration process, including disassembly and reassembly at the client’s site, took only 3 days. This fast turnaround was possible thanks to a pre-prepared rotating unit – a solution that minimizes machine downtime.