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150X210X25mm High Precision Rb Series Robot Cross Rb15025 Crossed Roller Bearings1
Cylindrical Roller Bearing, Crossed Roller Bearings, Crossed Roller Bearing
Shandong UJK Bearing Co., Ltd.
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Product Description Product Description Crossed Roller Bearings: The Pinnacle of Precision and RigidityOverviewA crossed roller bearing is a specialized type of rotary bearing characterized by its cylindrical rollers arranged in a crisscross (90°) pattern between two integral raceways. This unique alternating, orthogonal arrangement allows a single bearing to simultaneously support high loads in all directions-radial, axial, and moment loads-with exceptional precision and rigidity. This design makes them fundamentally superior to combinations of traditional bearings for applications requiring high accuracy and compactness.Key Features & Advantages:High Rigidity and Load Capacity: The line contact of the rollers and the cross arrangement provide maximum support, enabling the bearing to handle complex combined loads with minimal elastic deformation.High Rotational Accuracy: Manufactured to ultra-precise tolerances (e.g., P5, P4, ABEC 5, ABEC 7), they ensure extremely smooth and accurate rotation, which is critical for precision machinery.Compact Design & Space Saving: A single crossed roller bearing replaces the need for multiple conventional bearings arranged in pairs (e.g., two angular contact bearings), significantly reducing the overall size and weight of the assembly.Simplified Design and Assembly: Their single-unit design simplifies the surrounding structure, reduces the number of components, and eases installation, ensuring optimal preload and alignment.Smooth Motion: The precision-ground rollers and raceways provide consistent, low-friction motion with high stiffness.Common Types and Mounting Styles:Inner Ring Split / Outer Ring Integral: The inner ring is split into two parts for easy installation and precise preload adjustment by tightening connecting bolts.Outer Ring Split / Inner Ring Integral: The outer ring is split, favoring outer ring mounting.Standard Ring (Non-Split): Typically requires a specially designed housing for installation.Common Model Series Prefixes:The nomenclature varies significantly by manufacturer, but common series include:XR/CRB/CRBH Series: A very common type where the inner ring is split and the outer ring is integral. (e.g., XR from IKO, CRB from THK, CRBH from NSK).RU/RA/RE Series: Often feature a single-piece outer ring with mounting holes for direct installation onto a machine surface.XR/JXR Series (Thin-Type): Designed for applications with severe space constraints. (e.g., JXR from IKO).Crossed Roller Slewing Rings: Large-diameter bearings for rotary tables, often with gear teeth integrated into the outer or inner ring.Typical Applications:Crossed roller bearings are indispensable in high-precision fields:Robotics: Robotic arm joints, rotary actuators, and precision reducers.Machine Tools: Rotary tables, indexing heads, machining centers, and grinding machine spindles.Semiconductor Manufacturing: Wafer handling robots, stepper stages, and inspection equipment.Medical Equipment: CT and MRI scanner gantries, surgical robot joints.Aerospace and Defense: Radar antenna bases, optical aiming and guidance systems.Measuring and Inspection Instruments: Precision rotary stages for coordinate measuring machines (CMMs).
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