The THK Cross Roller Bearing Contact Roller Ring RW SERIES represents a specialized class of linear motion components engineered for applications demanding the highest levels of rotational accuracy, rigidity, and compactness. This series functions as a highly integrated bearing unit, where cylindrical rollers are arranged in a crossed pattern between a monolithic outer ring and two inner rings. This unique V-groove cross-roller construction allows the bearing to simultaneously support complex load combinations—including radial, axial, and moment loads—with a single, compact unit. The fundamental design eliminates the need for multiple, separately mounted bearings, simplifying assembly and ensuring exceptional structural integrity.

Key technical features define the superior performance of the RW SERIES. The precision-ground rollers make point contact with the raceways, significantly reducing rotational torque and frictional resistance, which is critical for smooth, low-vibration operation. The use of a one-piece outer ring and precision spacers between the rollers guarantees consistent, high-accuracy rotation by maintaining exact roller pitch and preventing skewing. This construction results in exceptionally high rigidity, minimizing elastic deformation under heavy or moment loads. Furthermore, the series is available with various sealing options to protect the precision-ground components from contaminants like dust and moisture, thereby ensuring long-term reliability and consistent performance in demanding environments. Optional configurations include flanged and non-flanged types, as well as units with pre-drilled mounting holes, offering significant design flexibility for integration into diverse mechanical systems.

The performance advantages of the RW SERIES translate directly into enhanced machine capability. Its compact design allows for the creation of more streamlined and space-efficient machinery without sacrificing load capacity or accuracy. The high rigidity ensures minimal deflection, which is paramount for maintaining precision in positioning and machining operations. The low torque and smooth rotation contribute to higher operational speeds, reduced power consumption, and decreased heat generation, leading to greater overall energy efficiency and system longevity. These attributes make the RW SERIES an enabling technology for applications where precision and reliability are non-negotiable.

Typical applications for the THK RW SERIES are found across high-precision industrial sectors. In industrial automation and robotics, these bearing rings are indispensable in the rotary joints of robotic arms, indexing tables for precision assembly, and the pivoting mechanisms of automated guided vehicles (AGVs), where they provide the critical combination of compact size, high moment load capacity, and flawless rotational smoothness. Within the realm of precision equipment, they are integral to the rotary stages of semiconductor manufacturing equipment, such as wafer steppers and inspection machines, and are fundamental to the high-accuracy rotation of medical imaging devices like CT and MRI scanners. In specialized automotive manufacturing and testing systems, the RW SERIES is utilized in precision jigs and fixtures, rotary actuators, and advanced dynamometer systems that require unwavering accuracy and durability under continuous operation.