HSTec Spindles – Precision Engineering from Zadar
HSTec – Technology Partner for High-Speed Applications
HSTec isn’t one of those names you hear first at every trade show. Based in Zadar, Croatia, the company was founded in 1997 and has quietly and steadily developed over the years into a serious specialist in high-speed spindles. Since August 2022, HSTec has been part of the CHIRON Group—a German machine tool manufacturer headquartered in Tuttlingen, known for its CNC-controlled milling and turning machining centers. This integration has not diminished HSTec, but rather expanded it: the expertise from Zadar now meets the global network of an established corporate group.
What sets HSTec spindles apart from the rest
The name HSTec stands for High-Speed Technique—and that’s not just marketing talk, but a commitment to excellence. Over the years, the company has developed a wide range of products, from grinding and milling spindles to turning and drilling spindles, as well as spindles for robotic machining. High-precision grinding spindles reach speeds of up to 90,000 rpm, while high-performance milling spindles deliver up to 100 kW—figures that attract attention even among experts.
What sets HSTec apart is the company’s commitment to developing its own technology rather than relying on off-the-shelf components. The prime example is the SMART spindle: an in-house development that monitors bearing temperature, vibration, and rotor speed in real time, integrates an active balancing system, and automatically compensates for thermal expansion of the spindle shaft. This is not a vision of the future, but a product available for delivery—and it demonstrates the technological direction HSTec is heading.
This is how HSTec motor spindles are constructed
HSTec manufactures its spindles to customer specifications—dimensions, torque, speed, tool clamping system, interface, bearings, and lubrication type can all be configured to suit the specific application. This may sound like flexibility, but it is primarily the result of a level of vertical integration that many competitors lack: The company’s facility in Zadar houses horizontal and vertical machining centers, CNC lathes and milling machines, as well as precision grinding machines for surface and cylindrical grinding. Those who manufacture their own spindles understand them best—a fact that becomes clear at the latest when a repair is needed.
HSTec Spindle Repair – KERN Spindle Service
At KERN Spindelservice, we repair motor spindles from nearly every manufacturer—including HSTec. Whether it’s bearing wear, a mechanical failure, or a defect in the SMART spindle’s sensor system, we assess the damage, provide a transparent cost estimate, and only begin work after receiving your approval.
Experience shows that having a spindle repaired by KERN costs about 20–30% less than purchasing a new one. Within 6 to 8 business days, you will receive your spindle back, fully tested and ready for use. We provide a 24-month warranty on every repaired spindle.
Are you looking for a service partner for your HSTec spindle? Contact us directly—we’re here to help.
