How to construct Crossed Roller Bearings for Optimal Rigidity and Easy Installation?

Machine designers are increasingly turning to crossed roller bearings for use in motion systems thanks to their high accuracy, rigidity and efficiency. This type of bearing uses alternately crossed rollers positioned at right angles to each other between inner and outer rings, which allows them to take radial, thrust and moment loads from any direction at the same time. Because the rollers make line contact with raceway surfaces, theres less deflection under load and more rigidity.

Crossed roller bearings are particularly suitable for applications with moderate rotational speed such as industrial robots, machine tools and medical equipment, especially because they come with a spacer to separate one roller from the other.

Crossed roller bearings types and features
1.CRA Thin Type (separable Outer Ring for Inner Ring Rotation)
CRA thin type is a small and light weight bearing with a very thin wall thickness. It carries heavy loads. Therefore, the bearing housing and pressure flange can be light weight. It is being used in rotary locations such as in robot hands. The outer rings of the CRA thin type are separable and fixed by special rivets.

2.CRB Standard Type (separable Outer Ring for Inner Ring Rotation)
CRB standard type is a bearing with thinnest possible inner and outer rings because the outer ring is split while the inner ring is integratedinto the main body. It is being used in cases where a high rotational accuracy of the inner ring is required.

3.CRE Standard Type (separable Inner Ring for Outer Ring Rotation)
CRE standard type is an innovative bearing based on the design of the CRB standard type bearing. The inner ring is separable while the outer ring is integratedinto the main body. It is being used in cases where the highrotational accuracy of the outer ring is required.

4.CRU Special Type (non-separable Inner- or Outer Ring)
CRU special type is a bearing with integrated inner- and outer ring. It is being used in cases where highrotational accuracy of both the inner- and outer ringsis required.

5.CRBH Special Type (non-separable Inner- or Outer Ring)
CRBH Series Cross Roller Bearings of inside and outside by the integral structure around it, rigid better, particularly suitable for installation size limited, high precision, and at the same time, high rigidity requirements of the occasion.

6.SX Standard Type(separable Outer Ring for Inner Ring Rotation)
SX standard type is a bearing similar to a RB standard type. The two separable outer rings are connected by circlips.