Powermat 1500 WEINIG Spindle Repair

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.

A spindle from the CHIRON FZ 18 W machining center arrived at our service. Two issues were reported: no tool clamping and a worn SK40 taper. This combination typically indicates wear of several components at once: the drawbar mechanism, bearings and the taper itself. We took over the entire process – from removing the spindle from the machine to reinstalling it in line with the CHIRON procedure. Thanks to this the customer has one point of contact, one report and full responsibility on our side.

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.

The HAAS spindle arrived at our service center with bearing damage caused by a collision. Upon delivery, we performed a thorough diagnostic check and — within 4 hours — prepared a detailed repair quote.

A machining center OKUMA Genos M560 arrived at our service with spindle wear symptoms: increasing noise at high speeds, noticeable vibrations, and occasional alarms during tool changes. Our goal was to restore stable operation, repeatability, and full speed parameters. Below we present the course of the OKUMA M560 electrospindle regeneration as a completed case study.

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.