Mikrosa spindle and motor spindle repair
Brochexpress is an independent workshop specializing in the repair, maintenance and diagnostics of Mikrosa spindles and motor spindles. Mikrosa is the Leipzig centerless grinder brand, now combined with Schaudt in Schaudt Mikrosa GmbH (United Grinding group) and known in particular for its Kronos series.
Mikrosa, centerless grinding from Leipzig
TLDR: Mikrosa is the centerless grinder brand from Leipzig (Germany). Since 2009 it has formed Schaudt Mikrosa GmbH together with Schaudt, a member of the United Grinding group. Its Kronos series covers parts from 0.5 to 250 mm in diameter.
With more than 130 years of history according to the manufacturer, the Mikrosa brand covers external centerless cylindrical grinding, from small injector needles up to railway axles. Older machines are found under the VEB Mikrosa Leipzig name (for example the SASL 125). The United Grinding group also includes brands such as Studer and Blohm.
The Kronos series: 11 to 95 kW wheel spindles
TLDR: On the Kronos series, the grinding wheel spindle delivers 11 to 95 kW depending on the model and the regulating wheel is driven at 5 to 12 kW, with cutting speeds of 63 to 80 m/s (up to 150 m/s with CBN).
According to the manufacturer's documentation (part diameter, grinding wheel, wheel drive, regulating wheel):
- Kronos S 125: parts from 0.5 to 30 mm, 400 × 125 mm wheel, 11 / 15 kW, regulating wheel 5 kW (5 to 500 rpm)
- Kronos S 250: parts from 1.5 to 35 mm, 450 × 250 mm wheel, 15 kW, regulating wheel 5 kW (5 to 500 rpm)
- Kronos M 400: parts from 1.5 to 100 mm, 610 × 400 mm wheel, 37 / 51 kW, regulating wheel 5.7 kW (5 to 450 rpm)
- Kronos K: parts from 4.5 to 35 mm, 610 mm wheel (300 to 400 mm wide depending on the document), 37 kW, regulating wheel 5.7 kW (5 to 600 rpm)
- Kronos L 660: parts from 5 to 250 mm, 660 × 660 mm wheel, 51 / 95 kW, regulating wheel 12 kW (5 to 300 rpm)
The bearing type of the Mikrosa spindle (hydrostatic or otherwise) is not stated in the documentation we consulted: we confirm it in our quote, from your machine's nameplate.
Mikrosa spindles and motor spindles covered (non-exhaustive list)
- Grinding wheel spindles on Kronos S, M, K and L centerless grinders
- Regulating wheel spindles
- Dressing spindles
- Spindles on older Mikrosa grinders (SASL 125 and VEB Mikrosa Leipzig models)
Interfaces and specifications
Manufacturer values for the Kronos series. Bearings and lubrication: to be confirmed in our quote, from your machine's nameplate.
Our expertise on your Mikrosa spindles and motor spindles
TLDR: Brochexpress covers the entire life cycle of your Mikrosa spindles and motor spindles, with the same rigour as for the other brands in our portfolio.
On-site service
- Diagnostics and repair directly on your machine, to limit production downtime
Full diagnostics
- Inspection of play, balancing, bearing condition, sealing and lubrication, with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme matched to your production rate, with corrective work in case of failure
Overhaul and refurbishment
- Grinding, bearing replacement, seal refurbishment and run-in test in our workshop, restoring original tolerances
Why choose Brochexpress for your Mikrosa spindles
- Independent workshop, with no financial ties to the manufacturers, ensuring an objective diagnosis
- Experience with centerless grinding spindles, where a spindle defect shows on the part immediately (cylindricity, chatter)
- Ability to handle older, often poorly documented machines
- Two service locations: Beaurepaire (France) and Lussery-Villars (Switzerland)
Turnaround and warranty
- On-site service within 48 hours
- Workshop repair: around 20 working days depending on parts availability
- 12-month warranty on all our repairs
Frequently asked questions
Do you repair the spindles of Mikrosa Kronos centerless grinders?
Yes, we repair both the Mikrosa grinding wheel spindle and the regulating wheel spindle.
Are Mikrosa and Schaudt the same company?
The two brands have been combined since 2009 in Schaudt Mikrosa GmbH, a member of the United Grinding group.
Do you work on older machines (VEB Mikrosa)?
Yes, we work on machines of any age.
What is the average turnaround for a complete overhaul?
Allow around 20 working days in our workshop, depending on the condition of the spindle and parts availability (bearings, seals, specific components).
Do you offer a preventive maintenance contract for a fleet of Mikrosa machines?
Yes, we set up preventive maintenance programmes matched to your production rate and the criticality of your machines.
Are you an official Mikrosa partner?
No. Brochexpress is an independent repair and maintenance workshop. We are neither affiliated with, nor a partner of, nor an authorised distributor of Schaudt Mikrosa GmbH or the United Grinding group. Our business covers 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 you need emergency on-site service, a complete workshop overhaul or a preventive maintenance programme, Brochexpress puts its expertise at the service of your production. As an independent workshop, we work on your Mikrosa spindles and motor spindles.
Our teams are available from our Beaurepaire (France) and Lussery-Villars (Switzerland) sites for a needs assessment, a diagnosis or a tailored quote.
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MIKROSA® and KRONOS® are registered trademarks of their owners. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of Schaudt Mikrosa GmbH or the United Grinding 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).