THK’s BLK Series Ball Screw represents a significant advancement in precision linear motion technology, engineered to deliver exceptional performance in demanding industrial applications. This transport ball screw model features a unique design with a compact, integrated ball circulation system that optimizes load distribution and minimizes friction. The screw shaft is manufactured from high-carbon chromium bearing steel, heat-treated to achieve a surface hardness of 58-62 HRC, ensuring superior wear resistance and long-term durability. Precision grinding of the screw shaft results in lead accuracy grades as tight as C3, providing consistent positional repeatability within microns. The nut body incorporates a resin end cap with a built-in ball deflector, which efficiently guides balls through the recirculation path while reducing noise and vibration during operation. A key technical feature is the use of THK’s proprietary ball screw wiper seal, designed to prevent contamination from dust, chips, and other particulates, thereby maintaining lubrication integrity and extending service life.

Performance advantages of the BLK Series are evident in its high efficiency, achieving mechanical efficiencies exceeding 90% due to optimized ball-to-raceway contact geometry. This efficiency translates directly into reduced power consumption and lower operational costs for machinery. The series supports dynamic load ratings up to 15 kN and static load ratings of 30 kN, enabling reliable performance under heavy loads and high thrust forces. Its compact nut design allows for space-saving integration into machinery with limited envelope constraints, while the preloaded nut configuration eliminates backlash, ensuring precise motion control critical for applications requiring high positional accuracy. The BLK Series operates smoothly across a wide temperature range from -20°C to 80°C and can attain linear speeds up to 2 m/s, making it suitable for high-speed automation processes. Additionally, its corrosion-resistant options, including stainless steel screw shafts and special surface treatments, enhance suitability for harsh environments like those found in chemical processing or food and beverage industries.

Typical applications for the THK BLK Series Ball Screw span multiple sectors where reliability and precision are paramount. In industrial machinery, it is extensively used in CNC machining centers for tool positioning, automated assembly lines for component transfer, and injection molding machines for platen movement. The automotive industry leverages these ball screws in electric power steering systems for precise rack positioning, robotic welding arms for consistent weld paths, and brake forming presses for accurate stroke control. Within precision equipment, the BLK Series finds application in semiconductor manufacturing apparatus for wafer handling stages, medical devices such as MRI table positioning systems, and optical instrument focusing mechanisms where sub-micron accuracy is essential. Its robust construction and maintenance-friendly design, including accessible lubrication ports for routine greasing, ensure minimal downtime and extended operational life, making it a cost-effective solution for continuous production environments. By combining high load capacity, precision engineering, and versatile configuration options, the THK BLK Series Ball Screw meets the rigorous demands of modern automation while supporting advancements in manufacturing efficiency and product quality.