The advantages of using crossed roller bearings
Because the divided inner ring or outer ring is connected with the cross roller ring after the rollers and spacers are set to prevent separation from each other, it is simple to operate while installing the cross roller ring. With only one pair of cross roller rings, it can sustain stresses in all directions since the rollers are placed in a cross. The stiffness is raised by 3 to 4 times as compared to the standard model. At the same time, because the cross roller bearing's inner ring or outer ring has a two-part construction, the bearing gap may be changed, and high-precision rotational movement can be accomplished even when preload is applied.
1. Extremely precise rotation
The rollers are positioned in a 90° mutually perpendicular crosswise pattern on the inside of the crossed roller bearing.
When the rollers are slanted, spacers or spacers are inserted between them to prevent the rollers from observing each other. Furthermore, on one side of the roller, there is no contact or locking phenomena; at the same time, because the inner and outer rings are split constructions, the gap can be changed, and high-precision rotational movement can be produced even when preload is applied.
2. Installation and operation are simplified
After the rollers and cages are set, the outer ring or inner ring, which is separated into two halves, is linked together, making the installation very straightforward.
3. Be able to withstand significant axial and radial loads
Because the rollers are spaced perpendicular to each other on the 90° V-groove rolling surface, they are perpendicular to each other.
4. Significantly reduce the amount of area required for installation
The inner and outer rings of the crossed roller bearing have been miniaturized to the smallest possible size, especially the ultra-thin structure, which is close to the limit of small size and has high rigidity, making it ideal for industrial robot joints or rotating parts, as well as the rotation of machining centers. Workbenches, manipulator rotating parts, precision rotating workbenches, medical instruments, measurement instruments, IC fabrication equipment, and other items are all utilized extensively.
5. High speed capability.
6. Thermal expansion generates very minor changes in geometric dimensions, reducing shaft length and processing costs.
7. Use nylon dividers for low moment of inertia, low starting torque, and simple angle indexing control.
8. Increase the pre-tightening force, increase the stiffness, and improve the precision of the guiding roller
9. Carburized steel has a high impact resistance and abrasion resistance on the surface.
10. It's simple, but it's lubricated well.
Crossed cylindrical roller bearings: classification and model series
RB Type (outer ring split type)
The fundamental type of crossed cylindrical roller bearing is the RB series. The inner and outer rings have been reduced in size. The outer ring is separated, while the inner ring has an integrated design, making it suited for parts requiring high rotation precision in the inner ring.
Type RE (inner ring split type)
The RE series model is a new kind based on the XRB model's design idea, with the same primary dimensions as the XRB model. Its construction consists of a split inner ring and an integrated outer ring, making it ideal for parts that require great rotation precision from the outer ring.
Type RU (inner and outer ring integrated type)
Because the mounting hole has been treated, the RU series model does not require a permanent flange or a support seat. Furthermore, installation has essentially no influence on performance due to the use of an integrated inner and outer ring construction with a seat, allowing for consistent rotation accuracy and torque. It may rotate both the outer and inner rings.
Type RA (outer ring split, ultra-thin type)
The RA series model is a compact type that decreases the inner and outer ring thickness of the RB type to the absolute minimum. It's ideal for parts that need to be lightweight and small, such as spinning robot and manipulator parts.
Type SX (outer ring split type)
The outer ring is a two-part construction joined by three spring snap rings, while the inner ring is constructed in one piece, which is appropriate for situations that demand high rotation precision of the inner ring, comparable to the RB series.
Type XSU (integrated inner and outer ring)
The RU series and the XSU series are quite similar. There is no need to install flanges or support seats because the inner and outer rings feature mounting holes. Installation has essentially little influence on performance due to the use of an integrated inner and outer ring construction with a seat, allowing for consistent rotation accuracy and torque. It may rotate both the outer and inner rings.
Do you have any specific questions about the design or manufacture of Cross roller bearings or Rotary table bearings? Contact Yogie! Our sales engineers will work with you from start to finish to ensure that your project is completed to your requirements.
Also, Yogie is a professional manufacturer for mining equipment, CNC Machine tools, and machinery parts for over 20years.
