Contactlager

Contactlager, also known as contact bearings, are a type of roller bearing designed to transmit loads and moments from one structural element to another. They are commonly found in applications where high rigidity and precision are required, such as in machine tool spindles, robotic arms, and optical instruments.

The fundamental principle of a contactlager is the use of rolling elements, typically balls or rollers, that are arranged in two rows. These rolling elements are in direct contact with the raceways of the inner and outer rings. The specific arrangement of the rolling elements and their contact angle are crucial to the bearing's ability to handle both radial and axial loads, as well as tilting moments.

There are several types of contactlager, including radial and axial configurations. Radial contactlager are primarily designed to support radial loads, while axial contactlager are designed for axial loads. Some designs can accommodate combined loads. The precision of a contactlager is often categorized by its accuracy classes, with higher classes indicating tighter tolerances and superior performance.

The main advantages of contactlager include high stiffness, low friction, and long service life. Their ability to transmit moments makes them ideal for applications requiring precise positioning and control. However, they can be more complex to install and maintain compared to simpler bearing types. Proper lubrication is essential for their optimal performance and longevity.