Analysis of the Application Scope and Characteristics of Thin-Wall Crossed Roller Bearings
Thin-walled crossed roller bearings are a type of high-precision, high-rigidity bearing. Their unique design imparts a range of exceptional performance characteristics, making them widely applicable in fields with stringent requirements for rotational accuracy and structural stiffness. These applications include the joint and rotation sections of industrial robots, CNC rotary tables, precision inspection instruments, optical telescopes, and large-scale radar antennas. Their main technical features are as follows:High Rotational Accuracy and High Rigidity: The rollers inside the bearing are arranged in a 90° vertically crossed pattern, with adjacent rollers oriented in opposite directions. This configuration enables the bearing to withstand combined loads (radial, axial, and overturning moments) simultaneously while exhibiting very high rigidity. By applying preload, internal clearance can be eliminated, resulting in extremely high rotational accuracy and smooth operation.Optimized Internal Structure: The rollers are precisely separated and guided by an integral cage. This effectively prevents roller skewing and sliding friction between rollers, reducing rotational torque and ensuring smooth rotation.Convenient Installation and Adjustment: The bearings feature a split design (either the outer ring or inner ring is a two-part structure). After the rollers and cage are assembled, the two halves are secured together via connecting bolts. This design simplifies the installation process and allows for precise setting of the radial clearance or preload by adjusting the mating surface of the split ring.Compact and Lightweight Design: The compact, crossed arrangement of two rows of raceways and rollers enables the bearing to achieve high load capacity and rigidity within a limited installation space. This contributes to equipment miniaturization, weight reduction, and material cost savings.
