Mitsui Seiki spindle and motor spindle repair
Brochexpress is an independent workshop specializing in the repair, maintenance and diagnostics of Mitsui Seiki spindles and motor spindles. We work from our sites in Beaurepaire (France, Auvergne-Rhône-Alpes) and Lussery-Villars (Switzerland) for precision machining manufacturers.
Mitsui Seiki spindles and motor spindles equip many very high-precision machining centres and high-demand production machines, notably in the aerospace, defence and precision subcontracting sectors. Drawing on our technical expertise, we support manufacturers — in France and across Europe — in overhauling their equipment and optimising its availability. A properly maintained motor spindle is the guarantee of precise, repeatable and productive machining.
Mitsui Seiki — Japanese manufacturer of very high-precision machining centres
TLDR: Mitsui Seiki is a Japanese manufacturer of very high-precision machining centres, recognised worldwide for its solutions intended for machining complex parts in the aerospace, defence and demanding subcontracting sectors, whose integrated spindles and motor spindles are a key element of performance.
Mitsui Seiki Kogyo Co., Ltd. is a Japanese manufacturer recognised worldwide for its very high-precision machining centres, both horizontal and vertical. Its motorised spindles and motor spindles, integrated into the HU, HS and VS ranges, are intended for machining complex parts to very high precision in sectors such as aerospace, defence and demanding subcontracting. Maintaining these assemblies requires in-depth knowledge of their architecture as well as suitable inspection equipment.
Mitsui Seiki spindles and motor spindles
TLDR: We handle repairs across the entire range: spindles and motor spindles integrated into Mitsui Seiki very high-precision machining centres.
Our teams carry out the repair of Mitsui Seiki spindles and motor spindles across the entire range: spindles and motor spindles integrated into horizontal and vertical very high-precision machining centres. From the initial diagnosis through to return to service, we restore the original performance of your equipment, in compliance with the expected tolerances and precision levels.
Mitsui Seiki products covered (non-exhaustive list)
- Spindles and motor spindles for Mitsui Seiki horizontal machining centres (HU 40-T, HU 63-T, HS 400)
- Spindles and motor spindles for Mitsui Seiki vertical machining centres (VS 5A, VS 6A)
- High-speed spindles for aluminium and aerospace composite machining
- Motorised milling heads for 5-axis machining
Your model is not listed? Contact us for confirmation.
Interfaces and specifications
Common tooling interfaces: HSK-A40, HSK-A63, HSK-A100, BT40, SA40, BT50, SA50, SK / BT. Very high rotational accuracy and low vibration level, with variable speed ranges depending on the application.
Our service
TLDR: Four complementary areas: on-site customer service, full diagnostics, preventive and corrective maintenance, overhaul and refurbishment — with testing and validation before return to production.
On-site customer service
- Disassembly of the motor spindle or spindle on the machine tool
- Secure packaging and transport to our workshops
- Reassembly and return to service on site after repair
Full diagnostics
- Vibration analysis
- Inspection of geometry and clearances
- Measurement of temperatures and loads
- Checking of bearings and balancing
Preventive and corrective maintenance
- Disassembly and full inspection
- Replacement of precision bearings
- Mechanical and electrical overhaul
- Cleaning and reassembly in accordance with the manufacturer's recommendations
Overhaul and refurbishment
- Repair of damaged spindles and motor spindles
- Fine adjustments to restore original performance
- Testing and validation before return to production
Why entrust us with your Mitsui Seiki spindles and motor spindles?
We work across the entire Mitsui Seiki range with no exclusivity, with the same expertise whatever the generation or model of your equipment
Disassembly and reassembly directly on your machine tool, to minimise production downtime as far as possible
In-depth command of the spindles and motor spindles integrated into Mitsui Seiki machining centres
We support aerospace prime contractors, defence manufacturers and major industrial groups over the long term
Our sites in Beaurepaire (Auvergne-Rhône-Alpes) and Lussery-Villars (Switzerland) allow us to respond quickly to French and European manufacturers
Lead times and warranty
- On-site service for disassembly: within 48h
- Repair time (diagnosis + return to service): around 20 days
- Warranty on repaired motor spindle: 12 months
Frequently asked questions
How much does a Mitsui Seiki motor spindle repair cost?
The cost of a repair depends on the model, its condition and the scope of the work to be carried out. Each job is the subject of a personalised quotation, drawn up after diagnosis. Contact us for an assessment of your situation.
What are the lead times?
We come on site for disassembly within 48h. The full repair time (diagnosis, return to service) is around 20 days.
What warranty applies to a repaired motor spindle?
We offer a 12-month warranty on repaired motor spindles. The detailed conditions are specified in the quotation and the service report.
Do you work on the spindles of Mitsui Seiki machining centres of all generations?
Yes. We handle all spindles and motor spindles integrated into Mitsui Seiki machining centres, across all generations. Contact us with the reference of your equipment for confirmation.
Are you an official Mitsui Seiki partner?
No. Brochexpress is an independent workshop for repair and maintenance. We are neither affiliated with, nor a partner of, nor an authorised distributor of Mitsui Seiki Kogyo Co., Ltd. Our business covers the independent 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).
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 the entire Mitsui Seiki range — spindles and motor spindles for very high-precision machining centres — with the responsiveness and rigour demanded by the most exacting industrial environments: aerospace, defence and precision subcontracting.
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.
Request a quoteRelated services
Mitsui Seiki® is a registered trademark of Mitsui Seiki Kogyo Co., Ltd. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of Mitsui Seiki Kogyo Co., Ltd. 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).