Hitachi Seiki spindle and motor spindle repair
Brochexpress is an independent workshop specialising in the repair, maintenance and diagnostics of Hitachi Seiki spindles and motor spindles — the historic Japanese manufacturer of CNC lathes and machining centres, with its own Seicos control, today part of the Mori Seiki group.
Hitachi Seiki, the Japanese maker of lathes and machining centres with proprietary control
TLDR: Hitachi Seiki is a historic Japanese manufacturer of CNC lathes and machining centres, recognised for its proprietary Seicos control range (E18M, Sigma 10M) and for the robustness of its horizontal and vertical centres, with a range covering vertical machining centres (VS), horizontal centres (HS) and multitasking turn-mill centres (SUPER HICELL).
Hitachi Seiki built a solid reputation in the manufacture of CNC lathes and machining centres, with one striking technical feature: the development of its own numerical controls under the Seicos brand (notably E18M and Sigma 10M), offering intuitive interfaces and simplified programming. The range covers vertical machining centres (VS series), horizontal machining centres with pallet changers (HS series, with magazines holding up to 60 positions), and multitasking centres combining 5-axis turning and milling (SUPER HICELL series), for machining complex parts requiring high accuracy and minimal vibration. A large number of Hitachi Seiki machines, although of an earlier technological generation, remain in service today in subcontract engineering workshops, with frequent CNC retrofit projects to extend their working life.
A range of BT-40 and BT-50 spindles, from vertical centres to high-power horizontal centres
TLDR: Hitachi Seiki machining centres use spindles with a BT-40 interface (vertical centres, up to 12,000 rpm) or BT-50 (horizontal centres, up to 25-30 kW), while the historic lathe range uses A2-6 nose spindles.
On Hitachi Seiki vertical machining centres (VS series), the BT-40 interface spindle can reach 10,000 to 12,000 rpm depending on the model and control generation (Seicos E18M on the most recent models). On horizontal machining centres with pallet changers (HS series), the BT-50 interface spindle delivers 25 to 30 kW at 10,000 rpm, with rapid traverse reaching 45 m/min and 60-position tool magazines. On CNC lathes of the historic range, the A2-6 nose spindle covers speed ranges from 30 to 5,000 rpm, for power ratings of 7.5 to 11 kW, with a 59 mm spindle bore and 51 mm bar capacity on common configurations. On SUPER HICELL multitasking centres, a high-speed spindle system guarantees minimal vibration for superior accuracy in 5-axis machining.
Hitachi Seiki spindles and motor spindles covered (non-exhaustive list)
- BT-40 spindles, VS series vertical machining centres, up to 12,000 rpm
- BT-50 spindles, HS series horizontal machining centres, up to 30 kW
- A2-6 nose spindles, historic CNC lathes, 30 to 5,000 rpm
- High-speed spindles of multitasking centres, SUPER HICELL series
- Spindles of machining centres retrofitted with a modern CNC
Interfaces and specifications
The Hitachi Seiki spindles and motor spindles we repair come with **BT-40** and **BT-50** interfaces on machining centres, and an **A2-6** nose on lathes, with rotation speeds from **30 to 12,000 rpm** depending on the machine.
Our expertise on your Hitachi Seiki spindles and motor spindles
TLDR: Brochexpress works across the entire life cycle of your Hitachi Seiki spindles and motor spindles, with the same rigour as for the other brands in our portfolio.
On-site customer service
- Diagnostics and service directly on your machine, in your production workshop, to limit downtime on your production line
Full diagnostics
- Inspection of clearances, balancing, bearing condition, sealing and compatibility with the Seicos control, with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme tailored to the production rates of general engineering, together with corrective action in the event of a breakdown
Overhaul and refurbishment
- Grinding, bearing replacement, sealing refurbishment and rotation testing in the workshop, restoring the manufacturer's original tolerances
Why choose Brochexpress for your Hitachi Seiki spindles and motor spindles
- An independent workshop, with no capital ties to manufacturers, guaranteeing an objective diagnosis
- Expertise in BT-40/BT-50 spindles and A2-6 nose configurations, including on retrofitted machines
- Two service sites: Beaurepaire (France) and Lussery-Villars (Switzerland)
- Support from the first intervention through to return to production
Turnaround and warranty
- On-site service within 48h
- Workshop repair: around 20 working days depending on parts availability
- 12-month warranty on all our repairs
Frequently asked questions
Do you repair the BT-40 spindles of VS series vertical machining centres?
Yes, we work on these spindles, whatever the rotation speed configured.
Do you work on the BT-50 spindles of HS series horizontal centres with pallet changers?
Yes, we diagnose and repair these spindles, which are sized for power ratings up to 30 kW.
What is the average lead time for a full overhaul?
Allow around 20 working days in the workshop, depending on the condition of the spindle and the availability of parts (bearings, seals, specific components).
Do you work on Hitachi Seiki machines undergoing a CNC retrofit?
Yes, we diagnose and repair the spindles independently of the control modernisation project.
Do you offer a preventive maintenance contract for a fleet of Hitachi Seiki machines?
Yes, we set up preventive maintenance programmes tailored to your production rate.
A reliable partner for your industrial performance
Whether it is an emergency on-site intervention, a full workshop overhaul or a preventive maintenance programme, Brochexpress brings its expertise to your production. As an independent workshop, we work across all Hitachi Seiki spindles and motor spindles — spindles and motor spindles of CNC lathes and machining centres — with the responsiveness and rigour demanded by the most exacting industrial environments.
Our teams are at your disposal from our sites in Beaurepaire (France) and Lussery-Villars (Switzerland) for a study of your needs, a diagnosis or a personalised quotation.
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Hitachi Seiki® is a registered trademark of the Mori Seiki group. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of the Mori Seiki group. Our business covers independent repair and maintenance of industrial equipment, permitted under the principle of referential trademark use (EU Trademark Directive 2015/2436 / French Intellectual Property Code, art. L.713-6).