Franz Kessler spindle and motor spindle repair
Brochexpress is an independent workshop specialising in the repair, maintenance and diagnostics of Franz Kessler spindles and motor spindles — the German manufacturer founded in 1923, the world's leading producer of motor spindles with 12,000 units built each year.
Franz Kessler, the world's leading motor spindle manufacturer since 1923
TLDR: Franz Kessler GmbH (Bad Buchau, Germany, originally founded in 1923 in Chemnitz) is the world's leading manufacturer of motor spindles, with around 12,000 spindles produced each year and more than 100 years of experience developing electric motors for machine tools.
Founded in 1923 in Chemnitz by mechanical engineer Franz Kessler, the company first devoted itself to the then emerging technology of electric drives, producing DC motors for machine tools and textile machinery. In the machine tool industry, Kessler built a solid reputation by equipping grinding machines with DC motors and their associated rotary converters, winning customers nationwide. Now based in Bad Buchau, the company has become the world's leading manufacturer of motor spindles, with around 12,000 units produced each year, and a broadened range covering high-technology spindles, two-axis heads, rotary and swivelling rotary tables as well as motors and direct drive systems. The Kessler group equips many DMG Mori machines in particular, and close collaboration with its customers remains its priority, allowing it to offer tailored solutions quickly and flexibly.
A range of motor spindles in HSK 63A and SK 40 interfaces, up to 120 kW
TLDR: Kessler spindles cover rotation speeds from 8,000 to 18,000 rpm depending on the configuration, in HSK 63A or SK 40 interfaces, with asynchronous and synchronous motors reaching up to 120 kW, and bearing lubrication by grease or by air-oil mist depending on the model.
Kessler motor spindles come in HSK 63A or SK 40 interfaces, with rotation speeds typically between 8,000 and 18,000 rpm depending on the configuration, in vertical, horizontal or universal alignment. Air-oil mist lubricated models equip the most dynamic configurations (up to 18,000 rpm), while grease lubricated models cover more moderate speed ranges (8,000 to 12,000 rpm). The manufacturer offers asynchronous and synchronous motors reaching up to 120 kW, as well as specific turning and milling spindles (V and H series) for boring, threading and grinding. On vertical lathe configurations, such as the models historically developed for Hessapp, the motor spindle can be combined with a rotary table assembly with integrated motor and various control components.
Kessler spindles and motor spindles covered (non-exhaustive list)
- HSK 63A motor spindles, up to 18,000 rpm
- SK 40 motor spindles, 8,000 to 18,000 rpm
- V series milling spindles, motorized, vertical, high speed
- H series milling spindles, for boring, threading and grinding
- Associated two-axis heads, rotary and swivelling rotary tables
Kessler products covered
Mechanical spindles
Mechanical spindles and turning spindles, all generations
Motorized spindles
Motor spindles for machining centres and production milling machines
Milling heads
Motorized heads and bi-rotary fork heads for 5-axis machining
Motor chucks and axes
Motor chucks, torque motors and axis drives
Your model is not listed? Contact us for confirmation.
Interfaces and specifications
The Franz Kessler spindles and motor spindles we repair come in HSK 63A and SK 40 interfaces, with rotation speeds from 8,000 to 18,000 rpm depending on the configuration, and motors reaching up to 120 kW.
Our expertise on your Kessler spindles and motor spindles
TLDR: Brochexpress works across the entire life cycle of your Kessler 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 manufacturing line
Full diagnostics
- Inspection of clearances, balancing, bearing condition, sealing and the lubrication system (grease or air-oil), with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme tailored to the production rates of aerospace and automotive work, 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 Kessler spindles
- An independent workshop, with no capital ties to manufacturers, guaranteeing an objective diagnosis
- Expertise in HSK 63A/SK 40 motor spindles and the associated rotary table configurations
- Two service sites: Beaurepaire (France) and Lussery-Villars (Switzerland)
- Support from the first intervention through to return to production
Turnaround and warranty
What we commit to on the Kessler spindles we take in:
- 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 Kessler motor spindles in HSK 63A interface (up to 18,000 rpm)?
Yes, we work on these spindles, whatever the lubrication system (grease or air-oil).
Do you work on the SK 40 spindles of DMG Mori machines and other builders fitted with Kessler?
Yes, we diagnose and repair these spindles, whatever the host machine.
How long does a full overhaul take?
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 H series milling spindles for boring, threading and grinding?
Yes, we diagnose and repair these spindles, whatever the operation performed.
Do you offer a preventive maintenance contract for a fleet of Franz Kessler spindles?
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 Franz Kessler spindles and motor spindles — motor spindles for turning, milling and grinding — with the responsiveness and rigour demanded by the most exacting industrial environments: aerospace, automotive, wood, metal, electronics and medical.
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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Franz Kessler® is a registered trademark of Franz Kessler GmbH. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of Franz Kessler GmbH. 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).