The THK LMH, LMH ML SERIES represents a high-performance, flanged type Cut Flange Model within the THK Guide Ball Bushing Linear Bushing family. This series is engineered for applications demanding compact design, high rigidity, and exceptional smoothness in linear motion. The defining characteristic of the flanged type with a cut flange is its unique housing design, which facilitates easy mounting and precise alignment while saving space and simplifying the overall machine structure. These linear bushings are designed to operate in conjunction with precision-hardened and ground shafts, providing a complete, highly reliable linear motion solution.

Technically, the LMH and LMH ML SERIES incorporate a ball-recirculating system that ensures smooth, low-friction travel with minimal fluctuation in torque. The construction features a cut in the flange, a design innovation that allows for radial installation and removal from the shaft without needing to disassemble other components—a significant advantage for maintenance and assembly in confined spaces. The bushings are manufactured from high-carbon chromium bearing steel, providing high load capacity and long service life. To optimize performance and durability, the balls are precision-ground and the raceways undergo a sophisticated heat treatment process to achieve high hardness and excellent wear resistance. Many models also include highly effective seals or shields to prevent the ingress of contaminants like dust and chips, thereby protecting the internal ball recirculation system and ensuring consistent performance even in harsh operating environments.

The performance advantages of this series are substantial. The combination of the flanged design and high rigidity translates to excellent moment load capacity, allowing the bushing to withstand forces that would cause misalignment or failure in less robust components. This results in improved positional accuracy and repeatability for the entire system. The low-friction coefficient and highly efficient ball recirculation contribute to high-speed capability and smooth motion, which minimizes vibration and noise—a critical factor in precision equipment. Furthermore, the standardized design and availability in various accuracy classes make these bushings versatile and easy to integrate into new or existing automation systems.

Typical applications for the THK LMH, LMH ML SERIES are found across a wide spectrum of industries. In industrial automation and machinery, they are extensively used in the linear axes of pick-and-place robots, automated assembly machines, precision measuring instruments, and sliding doors. Within the automotive sector, these components are vital in precision manufacturing equipment, such as CNC tool changers, welding robot arms, and parts transfer systems. For high-precision equipment, including semiconductor manufacturing apparatus, medical diagnostic devices, and optical positioning stages, the series’ smooth motion, accuracy, and reliability are indispensable. Their robust construction also makes them suitable for applications subject to vibration and varying loads, ensuring long-term operational stability and reducing maintenance downtime.