RAU6008-UU-CCO-P4 Ultra Thin Crossed Cylindrical Roller Bearing

Suffix Code Explanation

UU: Double-sided sealing; U for single-sided sealing; no U indicates open type without sealing
CCO: Zero preload clearance, high-rigidity version; CC1/CC2 represent different clearance groups
P4: Precision class P4 (higher than P5 and P6, specially used for precision equipment)

Core Product Advantages

Ultra-thin, compact and lightweight: With a cross-section of only 8mm and integrated inner & outer rings, it greatly reduces the overall machine size and moment of inertia, suitable for limited installation space.
Multi-directional combined load capacity: A single bearing withstands radial force, bidirectional axial force and overturning torque, replacing multiple bearing assemblies and simplifying mechanism design.
CCO zero-clearance preload: High rigidity and high rotary accuracy under P4 grade. Minimal runout, excellent positioning and indexing performance, outstanding for oscillating and low-speed rotation applications.
Bidirectional rotation compatibility: Integrated inner and outer ring structure supports either inner ring rotation or outer ring rotation for flexible selection and installation.
UU double-sided sealing: Blocks dust and debris and prevents internal grease leakage, suitable for general workshop environments and lowering maintenance frequency.
Nylon spacer: Separates rollers to reduce friction torque, delivering smooth start-stop operation and low rotation jitter.
Built-in grease fitting: Lubricating grease can be refilled after complete machine assembly without equipment disassembly for maintenance.

Main Application Scenarios

Industrial robots: Output end of harmonic reducers, wrist joints of robotic arms, rotary joints of dexterous hands, rotating parts of SCARA robots; ideal for applications requiring compact size and anti-overturning moment.
DD direct drive torque motors: Direct-drive rotary tables and servo rotary platforms for high-precision, low-wobble rotary support.
Precision machine tools & inspection equipment: Small CNC indexing tables, rotary stations of detectors, rotary mechanisms for optical lenses, rotary tooling for visual inspection.
Medical equipment: Rotary assemblies for CT and imaging diagnostic devices, precision medical manipulators, rotary units of surgical instruments, for space-restricted installations.
Semiconductor & automation equipment: Mini rotary mechanisms for wafers, automated rotary tooling, rotary components of test probe stations.
Aerospace, radar & communication: Small rotary bases for radar, mini rotary parts of optoelectronic pods.

Installation & Operation Notes

1. P4 precision bearing. Hammering during installation is prohibited. Use press-fit tooling and avoid directly striking the rings to prevent precision degradation.
2. The CCO zero-preload version features high rigidity and is not suitable for continuous high-speed rotation. It is mainly used for low-speed rotation, oscillation and intermittent indexing working conditions.
3. The mating shaft and bearing housing must meet corresponding precision tolerances; otherwise the factory-set preload and accuracy will be compromised.
4. UU sealed version is designed for grease lubrication. Open non-sealed type with oil lubrication is recommended for high-speed working conditions.
5. Refill lithium-based grease through grease fittings after assembly. Do not fully fill the cavity; fill grease to approximately 30% of the cavity volume.