Advantages of crossed roller bearings
The internal structure of the crossed roller NSK bearing adopts the rollers arranged in a 90° mutually perpendicular crosswise arrangement (this is also the origin of the name of the crossed roller bearing), and spacers or spacers are installed between the rollers to prevent the rollers from tilting or rolling. Observe each other, effectively preventing the increase of the rotation torque. In addition, there is no contact phenomenon or locking phenomenon on one side of the roller; at the same time, because the inner and outer rings of the standard cross roller bearing are divided into a structure, the gap can be adjusted, even if the pre-pressure is applied, high-precision rotational movement can be obtained.
In addition to the above performance, crossed roller bearings have the following advantages:
1. Simplified operation and installation
The standard cross roller bearing is divided into two parts of the outer ring or inner ring. After the rollers and cages are installed, they are fixed together. During installation, the connecting bolts and fixing flanges can be fine-tuned to achieve the ideal load state. , So the operation during installation is very simple.
2. Withstand large axial and radial loads
Because the rollers are arranged perpendicular to each other on the 90° V-groove rolling surface through spacers, this design enables the crossed roller bearing to withstand larger radial loads, axial loads, moment loads, etc. Direction of the load.
High-precision crossed roller bearings
3. Significantly save installation space
The size of the inner and outer rings of the crossed roller bearing is greatly miniaturized, especially the ultra-thin structure is close to the limit of small size, and has high rigidity, so it is suitable for the joint or rotating part of industrial robots, and the rotating work of machining centers. It has a wide range of uses such as tables, rotating parts of manipulators, precision rotating tables, medical instruments, measuring instruments, and IC manufacturing equipment.
4. There are more types and structures of derivatives
Suitable for various applications. On the basis of the basic cross-roller bearings, many cross-roller bearings with different structures are derived to facilitate the use of different requirements. In terms of major categories, it can be divided into: basic cross roller bearings, high rigidity cross roller bearings, ultra-thin cross roller bearings; from the external structure, there are inner ring split type, outer ring split type, inner and outer ring Ring integral type; from the internal structure, it can be divided into full roller type, metal window cage type, nylon or metal spacer type;