Linear bearings, as a kind of plain bearings, are known for their ability to withstand large loads and moderate speeds. This type of bearing is not designed to have a self-locking function, so it is easy to fail when the radial clearance is too large. To address this issue and optimize performance, engineers undertook a series of innovative structural improvements.
Structural characteristics
Linear bearings are mainly composed of an inner ring, an outer ring and a rolling element located between the two. In order to reduce the error caused by large radial clearance, the design uses the inner and outer rings to contact the rolling element at the same time, or by machining special shape holes to achieve a closer fit. Although these methods help to reduce radial clearance, they can also lead to increased friction torque and increased bending stress. In addition, the use of a cylindrical roller chain composed of multiple rows of rollers as a guide can further improve the rigidity of the shaft, making it more suitable for low-speed and heavy-duty applications, such as the machine tool spindle and other key transmission parts.
Installation and maintenance points
Proper installation is essential to ensure optimum performance of linear bearings. Here are some important guidelines:
Alignment: Ensure that the axis direction is perpendicular to the direction of the applied load, and that the axis center line is parallel to the line of action of the load.
Accuracy: Maintain accurate position relationship between components.
Fastening: Tighten all screws according to the manufacturer's recommended torque value.
Tilt control: Avoid excessive tilt Angle during assembly.
Check status: Confirm that there is no stuck or rust phenomenon.
Lubrication management: Filter lubricating oil before use, and regularly test to check the quality of lubricant; Keep clean while working.
Abnormal response: Stop using the device as soon as you notice anything unusual.
Operating restrictions: Do not overload the use of bearings, do not knock, avoid high-speed operation, ensure that the operating temperature does not exceed 60°C.
Safety rules: Follow the "six no" and "four no hanging" safety specifications to ensure the safety of operation.
Through the understanding of linear bearing structural characteristics and maintenance precautions, users can better choose products suitable for specific application scenarios, and extend their service life through proper maintenance. Proper installation and maintenance can not only improve work efficiency, but also effectively prevent potential safety risks.
