RU series（Integrated Inner/Outer Ring type） Since the mounting holes are provided, the model does not require a presser flange or housing. In addition, because it has an integrated inner/outer ring structure and is equipped with washers, its performance is minimally affected by the mounting procedure, ensuring stable rotation accuracy and torque. 
This model can be used for both inner-ring rotation and outer-ring rotation.
Bearing characteristics:
1. High precision: P4 precision, P2 precision
2. High rigidity: This series bearing have preload
3. High load：This series bearing can bear double-direction axial load, radial load and tilting moment
4. Small size: This series bearing can save space for machine tools
APPLICATION:
widely used on high precision rotary table, robot joints, rotating units, sophisticated medical equipments, and measurement instruments.