RAU Series

RAU Series Crossed Roller Bearings (Compact Type with Seals)

The RAU Series is an ultra-thin, compact crossed roller bearing designed for applications where lightweight construction, compactness, and space savings are paramount. The series supports rotation of both inner and outer rings, offering exceptional design flexibility for precision motion control systems.

Applications：

Robotics: Joints and swivel units of industrial robots and manipulators, especially for end-effector rotation where space constraints are critical.

Medical Equipment: Robotic surgical instruments and diagnostic devices requiring high-precision rotational positioning with minimal installation space.

Machine Tools: Precision rotary axes and positioning systems in CNC machinery.

Automation: Rotary tables, turntables, and indexing equipment in automated manufacturing systems.

Semiconductor Manufacturing: Precision positioning equipment requiring ultra-compact, high-accuracy rotational motion.

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Inquiry	Type	Brand	Shaft Diameter	Main Dimensions						Shoulder Height		Basic Load Rating (Radial)		Mass
Inquiry	Type	Brand	Shaft Diameter	Inner diameter d	Outer diameter D	Roller Pitch Circle Diameter dp	Width B B1	Greasing hole d0	r min	ds (max)	Dh (min)	C kN	Co kN	g

The RAU Series features a one-piece integrated structure for both inner and outer rings, supporting rotation of both rings for flexible installation options.

The bearing incorporates cylindrical rollers arranged with their axes alternately crossed at 90 degrees within V-shaped raceways. This crossed-roller configuration enables the bearing to simultaneously accommodate radial, axial, and moment loads in all directions using a single bearing set.

The RAU Series crossed roller bearing combines ultra-thin section design with exceptional rigidity and precision, making it the optimal choice for applications where weight reduction, space savings, and high load capacity must be achieved simultaneously. Its robust crossed-roller configuration ensures reliable performance under multi-directional loading, while the integrated ring design offers flexible installation for both inner and outer ring rotation applications.