The THK LM Guide SRG G Series represents a significant advancement in linear motion technology, featuring a full roller type design engineered for ultra-high rigidity and exceptional load capacity. This guide utilizes cylindrical rollers in both the rail and block, which are precision-ground to optimize contact with the raceways. This configuration ensures a robust, stable bearing arrangement capable of withstanding heavy loads and moments with minimal elastic deformation. The rollers are meticulously arranged in a staggered pattern to provide continuous, smooth contact along the entire travel path, effectively distributing stress and enhancing the system’s overall durability and service life.
Key technical features of the SRG G model include its optimized roller end design and specialized crowning, which mitigate edge loading and stress concentration at the roller ends. This design refinement significantly reduces friction and wear, contributing to consistent performance over extended operational periods. The guide is constructed from high-grade steel, subjected to rigorous heat treatment processes to achieve superior surface hardness and core toughness, ensuring resistance to indentation and fatigue under demanding conditions. Additionally, the SRG G incorporates an advanced sealing system comprising multiple seals and scrapers that effectively exclude contaminants such as dust, chips, and moisture, while retaining lubrication within the rolling elements. This results in maintained accuracy and prolonged maintenance intervals, even in harsh environments.
Performance advantages are evident in its ability to deliver high positional accuracy and repeatability, critical for applications requiring precise linear movement. The ultra-high rigidity minimizes deflection under load, enabling higher feed rates and improved machining efficiency without sacrificing precision. Its high-speed capability is supported by reduced vibration and noise levels, contributing to smoother operation and enhanced workpiece quality. The SRG G’s design also allows for easy installation and adjustment, with options for pre-load selection to match specific application requirements, from light pre-load for high-speed applications to heavy pre-load for high rigidity needs.
Typical applications span various high-demand sectors, including industrial machinery such as CNC machining centers, where it provides stable support for spindle heads and tool changers under heavy cutting forces. In automotive manufacturing systems, it is employed in robotic welding arms, transfer lines, and precision assembly equipment that require robust, reliable motion under continuous operation. Within precision equipment, the SRG G finds use in semiconductor manufacturing apparatus, optical measuring instruments, and medical devices where ultra-high rigidity and minimal vibration are paramount for achieving micron-level accuracy and repeatability. Its versatility and reliability make it an ideal choice for enhancing productivity and precision in advanced automation and manufacturing processes.