The THK Ball Spline Caged Ball Spline Model SLS (medium load type) SERIES represents a specialized linear motion component engineered for applications requiring precise torque transmission and linear guidance under moderate load conditions. This ball spline design incorporates a unique caged ball construction where precision steel balls are systematically arranged and retained within a cage structure between the spline shaft and the nut. This configuration ensures smooth, low-friction movement while maintaining accurate rotational and linear positioning, making it ideal for scenarios involving combined linear and rotary motions.

Key technical features of the SLS series include its robust medium-load capacity, achieved through optimized ball groove geometry and high-grade materials that provide excellent resistance to wear and deformation. The caged ball design minimizes friction and prevents ball-to-ball contact, reducing heat generation and extending operational life. The spline shaft is precision-ground to tight tolerances, ensuring minimal backlash and high rigidity. Additionally, the nut assembly is designed for easy integration with standard mounting configurations, and options for lubrication fittings facilitate maintenance in demanding environments. The series is available in various shaft diameters and lengths to accommodate diverse application requirements.

Performance advantages are evident in its ability to handle simultaneous linear and rotational forces with high efficiency and precision. The low friction coefficient results in smoother operation and reduced power consumption, while the high rigidity minimizes deflection under load, maintaining accuracy in dynamic conditions. The caged ball system enhances durability by distributing loads evenly across the balls, reducing stress concentrations and mitigating the risk of brinelling. This design also allows for higher speeds and accelerations compared to conventional splines, thanks to reduced vibration and noise levels. Furthermore, the SLS series operates reliably in contaminated environments when paired with appropriate seals, ensuring consistent performance in industrial settings.

Typical applications span multiple industries, leveraging the series’ versatility. In industrial machinery, it is commonly used in automated assembly lines for robotic arm joints, where precise linear and rotary movements are critical for tasks like pick-and-place operations or welding. In automotive systems, the SLS series finds use in steering column mechanisms, transmission shifters, and throttle control linkages, providing reliable torque transmission and positioning accuracy. For precision equipment, it supports applications such as semiconductor manufacturing devices, medical imaging systems, and optical alignment tools, where minimal backlash and high repeatability are essential. Its medium-load capacity makes it suitable for scenarios that demand a balance between performance and compact design, such as packaging machinery or CNC tool changers, ensuring efficient and long-lasting operation in repetitive motion tasks.