THK’s BLR SERIES Ball Screw Rotary Nut Ball Screw represents a sophisticated evolution in linear motion technology, engineered to deliver exceptional precision, reliability, and versatility in demanding industrial applications. This innovative model features a unique rotary nut design where the nut rotates while the screw remains stationary, effectively reversing the conventional ball screw operation. This configuration allows for simplified mechanical layouts, reduced system inertia, and enhanced dynamic performance, making it ideal for scenarios requiring high-speed, high-accuracy linear motion with minimal space constraints.

Key technical features of the BLR SERIES include a compact and lightweight rotary nut assembly, precision-ground screw shafts for smooth and consistent motion, and high-capacity ball circuits that optimize load distribution and minimize wear. The series incorporates THK’s advanced ball recirculation technology, ensuring low noise operation and extended service life even under rigorous cycling conditions. Available in various lead and accuracy grades, the BLR SERIES supports customization to meet specific application requirements, with options for preloading to eliminate backlash and enhance positional accuracy. Additionally, the design facilitates easy integration with motors and drive systems, thanks to standardized flange and shaft configurations.

Performance advantages are substantial, starting with exceptional rotational speed capabilities enabled by the rotary nut’s balanced design and efficient heat dissipation. This allows for faster acceleration and deceleration, boosting throughput in automated systems. The stationary screw eliminates the need for complex support structures, reducing overall system weight and simplifying installation. High rigidity and precision contribute to repeatability within micron-level tolerances, critical for tasks involving fine positioning. Moreover, the BLR SERIES demonstrates excellent efficiency, with low torque requirements that translate to energy savings and reduced operational costs over time. Its durability is reinforced by corrosion-resistant materials and seals that protect against contaminants, ensuring reliable performance in harsh environments like those with dust, chips, or moisture.

Typical applications span multiple high-tech industries, leveraging the BLR SERIES’ strengths in precision and speed. In industrial machinery, it is commonly deployed in CNC machining centers for tool changers and spindle drives, where rapid and accurate positioning is essential for productivity. Automotive manufacturing systems utilize these ball screws in robotic welding arms, assembly line transporters, and testing equipment that demand high cycle rates and minimal maintenance. Within precision equipment, the BLR SERIES excels in semiconductor manufacturing devices, optical alignment systems, and medical automation, such as imaging scanners and laboratory analyzers, where smooth, vibration-free motion is paramount. By offering a blend of compact design, high performance, and adaptability, THK’s BLR SERIES provides a robust solution for advancing automation and precision across diverse sectors.