Robert Renaud SA – High precision from the heart of Swiss precision engineering
Precision on a small scale
There are companies that try to dominate the market with a high-profile presence and a broad product range. Robert Renaud SA in Boudry, Switzerland, does not follow this path. Since 1985, the company has been manufacturing high-precision spindles—developed, manufactured, and assembled entirely in-house, component by component, by a team of fewer than fifty people. The result is spindles that enjoy a distinct reputation in the global market for electric spindles: not because of aggressive marketing, but because of measurable performance.
Boudry is located in the canton of Neuchâtel—in the heart of a region that has been synonymous with watchmaking and precision engineering for generations. Robert Renaud SA carries on this tradition in the field of machine tool manufacturing. The company specializes in spindle applications with diameters ranging from 20 to 210 mm—precisely where precision and reliability are key to product quality.
High-performance solutions for demanding applications
Robert Renaud SA offers three main product lines: electric spindles, motor spindles, and belt-driven spindles—and within each of these lines, there are several series tailored to specific applications. The HFB, HFC, and HFCC series are designed for high-speed milling, turning, and drilling.
- The HRC series is specifically designed for high-speed grinding,
- The HDC spindles perform the dressing.
- Those who prefer belt drives will find grinding spindles in the RC series and solutions for milling, turning, and drilling in the FR series.
What ties this diversity together is a shared commitment: all components are manufactured in-house. Housings, shafts, bearings—everything is produced at the company’s facility in Boudry. Robert Renaud SA sources hybrid ball bearings and tool holders from select suppliers, while everything else is manufactured in-house. This not only ensures quality but also gives the company a level of service depth that many larger manufacturers cannot match.
This is how Renaud spindles are designed
Robert Renaud SA develops its spindles as comprehensive R&D projects—not as assemblages of off-the-shelf standard components. Motors are developed in collaboration with selected suppliers and are designed for maximum power density within the smallest possible footprint. High-precision hybrid ball bearings are used for support, and cooling systems, tooling systems, and protective measures against dirt and moisture are designed as integral components of the spindle—not as aftermarket additions.
The result is a spindle designed for demanding processes: vibration-free, durable, and low-maintenance. Anyone who has ever used a Renaud spindle knows why this company has quietly been one of the most sought-after names in the spindle market for decades.
Expert service for Swiss precision spindles
If a Renaud spindle fails, finding a good solution can be costly—a new spindle from Switzerland isn’t a cheap option, and not every service provider is truly familiar with these models. At KERN Spindelservice, we repair electric spindles, motor spindles, and belt-driven spindles from Robert Renaud SA professionally and independently of the manufacturer: with bearing diagnosis, bearing replacement, inspection of concentricity and shaft geometry, as well as a final test run under operating conditions.
Experience shows that a repair by KERN costs 20–30% less than a new spindle—and you’ll have your spindle back within 6 to 8 business days. We provide a 24-month warranty on every repair. For over 35 years, we’ve worked with spindles from numerous manufacturers and nearly every brand—and we have hands-on experience with Renaud spindles.
Is your Renaud spindle out of service and do you need a quick solution? Contact KERN Spindelservice directly—we’re here to help.
