Cross Roller Ring Bearings: The Secret Weapon of Robot Joints
The internal structure of cross roller ring bearings is truly a marvel of engineering! The rollers are arranged at 90° to each other in a cross pattern, and there are spacers or separators between them. This design prevents the rollers from tilting or rubbing against each other, so the rotational torque does not increase. Even better, this design prevents any one of the rollers from locking or contacting abnormally.
Why Choose Cross Roller Ring Bearings?
High Rigidity and High Precision: The inner and outer rings of cross roller ring bearings are robust and inseparable, allowing them to achieve high rigidity and precision easily without being affected by the surrounding structure. Whether at medium to high speeds or with spacers between cylindrical rollers, they provide smooth rotation.
Easy Installation: These bearings have a small outer diameter and narrow width, making them very convenient to install. Additionally, their outer or inner rings are split into two parts. Once the rollers and retainer are installed, they are fixed together, making the operation incredibly simple.
High Precision: The precision of cross roller ring bearings can reach P4/P2 levels. Their smaller size also helps save space in the main equipment.
Advantages of Cross Roller Ring Bearings for Robots
Excellent Rotational Accuracy
The internal structure of cross roller ring bearings ensures that the rollers do not tilt or rub against each other, effectively preventing an increase in rotational torque. High-precision rotational movement can be achieved even when preload is applied.
Simplified Operation and Installation
The outer or inner ring is split into two parts and, after installing the rollers and retainer, is fixed together. This makes the installation operation very simple.
Can Withstand Large Axial and Radial Loads
The rollers, arranged perpendicularly in V-shaped grooves with spacers, allow cross roller ring bearings to withstand large radial and axial loads as well as moment loads in all directions.
Space-Saving Installation
The inner and outer ring sizes of cross roller ring bearings are minimized to the smallest possible dimensions, especially the ultra-thin structure which approaches minimal size limits while maintaining high rigidity. Therefore, they are suitable for joint or rotational parts in industrial robots, rotary tables in machining centers, robot rotating parts, precision rotary tables, medical instruments, measuring devices, IC manufacturing equipment, and other areas.
In summary, cross roller ring bearings truly shine in robots! They make the joints of industrial robots more flexible, offer ultra-high rotational accuracy, are simple to operate, can withstand large axial and radial loads, and save installation space. They are practically the "Swiss Army knife" of the robotics field!