High-Performance Crossed Roller Bearings and Rotary Table Bearings for Demanding Applications

In the fields of industrial automation and high-end equipment manufacturing, core motion units such as robot joints and CNC rotary tables place extremely stringent demands on bearing load capacity, motion accuracy, and operational stability. To meet these challenges, the NERT brand cross-roller bearings and rotary table bearings, developed by Luoyang BOBI Precision Bearing Co., Ltd., provides an ideal solution through innovative design and precision manufacturing processes.                                                                                                    This series of bearings features a unique design with cylindrical or tapered rollers arranged in a crossed pattern at 90°. A single row of rollers can simultaneously withstand axial loads, radial loads, and tilting moments, creating a stable multi-directional mechanical support system. Compared to traditional combinations of multiple bearing rows, this integrated structure eliminates cumulative mounting errors and redundant internal clearance. It achieves high rigidity, a compact footprint, and a well-defined load path within limited spaces.                                                                                                                                                                                                                    Precision is another core performance metric for bearings, directly impacting robot positioning accuracy, repeatability, and CNC table indexing precision. BOBI bearings benefit from precision manufacturing across the entire production chain: Premium bearing steel is selected and undergoes precision forging and heat treatment to ensure material uniformity and dimensional stability. Raceways and rolling elements are processed with ultra-precision grinding and lapping to achieve micrometer-level geometric accuracy and low surface roughness, effectively reducing friction and micro-vibration. During assembly, precise preload and clearance control ensure the bearings are in an optimal operating state, offering high rigidity, low starting torque, and smooth running characteristics. This enables minimal rotational runout even under high-speed and high acceleration/deceleration conditions.                                                                                  Leveraging these performance advantages,BOBI bearings are widely used in critical robot joints such as the waist, arms, and wrist. They provide high rigidity and precision support within complex motion envelopes and confined spaces, significantly enhancing robotic agility and positioning accuracy. In CNC machine tool 4th and 5th axis rotary tables, these bearings serve as the core rotary component. They maintain excellent tilt resistance and rotational accuracy even under heavy cutting loads, ensuring consistent machining quality and surface finish. Furthermore, in high-precision fields like semiconductor manufacturing equipment, optical inspection platforms, and medical devices, their low friction, low vibration, and high precision retention capabilities ensure long-term, stable equipment operation.