The THK Ball Screw Support Unit Round Type Fixed Side Model FK SERIES represents a precision-engineered solution for stabilizing and supporting ball screws in demanding linear motion applications. These units are specifically designed as the fixed-side support for ball screws, providing robust axial rigidity and precise rotational alignment critical for high-accuracy systems. The round-type housing design allows for straightforward mounting in standard circular bores, simplifying installation while maintaining exceptional structural integrity.

Technically, the FK SERIES incorporates a high-precision, preloaded angular contact ball bearing as its core rotational element. This bearing is specifically selected and configured to handle substantial axial loads while minimizing rotational friction and heat generation. The unit features a compact, sealed design with integrated contact seals that effectively prevent lubricant leakage and contaminant ingress, ensuring long-term reliability even in harsh operating environments. The housing is manufactured from high-strength steel or equivalent durable materials, with precision-ground mounting surfaces that guarantee perpendicularity and concentricity with the ball screw axis. Standard models are available with standard or low-temperature rise specifications, allowing selection based on specific speed and thermal management requirements.

Performance advantages of the FK SERIES are significant across multiple parameters. Its primary benefit lies in exceptional axial rigidity, which directly translates to improved positioning accuracy and repeatability by minimizing deflection under load. The low-friction bearing design contributes to higher mechanical efficiency, reducing drive motor requirements and energy consumption. The sealed construction extends maintenance intervals by retaining lubrication and excluding abrasive particles, leading to a longer service life and reduced total cost of ownership. Furthermore, the unit’s ability to accommodate high rotational speeds makes it suitable for rapid traverse applications without sacrificing stability or generating excessive noise.

Typical applications for the FK SERIES are found wherever precise linear motion is paramount. In industrial machinery, these support units are integral to CNC machining centers, where they provide the stable foundation for high-speed tool positioning and heavy-duty cutting operations. They are equally critical in industrial robots, particularly in articulated arm joints and linear actuators requiring precise movement control. Within automotive manufacturing systems, FK units support ball screws in automated assembly lines, precision welding equipment, and component testing machinery that demand reliable, high-cycle operation. In the realm of precision equipment, these components are essential to semiconductor manufacturing apparatus, optical positioning stages, and medical device automation where sub-micron accuracy and vibration damping are crucial. The series’ versatility also extends to packaging machinery, printing presses, and coordinate measuring machines where smooth, precise linear motion directly impacts product quality and operational efficiency.