Mehrfachkeilführungen

Mehrfachkeilführungen, also known as multiple wedge guides, are a type of linear motion bearing designed for applications requiring high precision and rigidity. They are characterized by the use of multiple inclined surfaces, or wedges, to guide the motion of a component. This design allows for the elimination of play and the generation of a very stiff linear movement.

The principle of operation involves precisely ground inclined surfaces on both the guiding element and the sliding element. When the wedges are brought into contact, any force applied to the sliding element is transmitted through these inclined surfaces, creating a clamping effect. Adjustments to the wedge positions allow for the fine-tuning of the clearance, effectively preloading the bearing to remove any play. This preloading is crucial for achieving high accuracy and repeatability in positioning.

Mehrfachkeilführungen are often constructed from hardened steel or other wear-resistant materials to ensure longevity and maintain their precise geometry over time. Their construction allows for high load capacities and resistance to shock and vibration, making them suitable for demanding environments such as machine tools, metrology equipment, and semiconductor manufacturing. The design can be implemented in various configurations, including dovetail wedges or straight wedges, depending on the specific application requirements for guidance and constraint. Their ability to provide backlash-free linear motion makes them a preferred choice where precision is paramount.