Choosing the Right Cross Roller Bearing

Cross roller bearings are used in a variety of industrial applications, from precision rotary tables to medical equipment. They can handle radial and axial loads. The most common application for cross roller bearings is in machine tools. However, these devices can also be found in rotating parts of robotics.

These bearings are made of metal, plastic, or resin. Metal cages are generally better for applications where the operating temperature is high, while plastic and resin cages are good for applications that need to protect sensitive equipment. Resin cages provide a larger contact surface and allow rollers to contact the bearing bed, increasing load capacity by up to 250%. In addition, resin cages can reduce friction, reducing torque resistance when rolling.

Cross roller bearings are available in several different designs. The most important difference between them is the type of the outer ring. Some types, such as the RB shape, feature a single-piece outer ring structure, while others feature a split outer ring with mounting holes. Choosing the right cross roller bearing depends on the type of application and the rotation part of the mechanism.

High rigidity crossed roller bearings are ideal for high-speed, rotating applications. These devices feature separators between the cylindrical rollers, which reduce deformation. This allows these bearings to carry heavier loads without compromising rigidity. Aside from preventing deformation, this technology allows for smooth, short-stroke motion.

Cross roller bearings come in various sizes, from small to large. Mid-sized models are commonly used for applications in machine tools and textile machinery. Increasing demand for small-sized bearings is boosting the market for this type of bearing. Small-sized bearings are used in industrial robots, CT scanners, and robotic surgery devices. For this reason, manufacturers are supplying customized models.

In addition to high rigidity, these bearings have high running accuracy and can withstand moment loads. The bearings have low friction and low grease consumption. There is also no need to use seals or other devices to maintain the cleanliness of the device.

These devices can be used for a wide range of industries, including automotive, industrial, aerospace, medical, and defense. During a manufacturing process, these bearings help in minimizing damage. When a manufacturer purchases a cross roller bearing, it is important to consider its installation location, particularly in areas with limited space. Also, cross roller bearings are usually designed with rounded ends to minimize loading. Rounded ends can reduce the maximum stress value of the rollers, improving the lifetime of the bearing.

The size of the load-bearing area of a cross roller bearing is dependent on the number of rollers in each ring. A single row of rollers can support heavier loads, while multiple rows can handle a lighter load. Furthermore, the number of rollers in each ring is controlled by the spacing between them. If the rollers are too close together, the cross roller bearing will have a lower load-bearing capacity. On the other hand, if the rollers are installed closer together, the bearing can carry a higher weight per inch.