Rotationstische

Rotationstische, also known as rotary tables or indexing tables, are precision machine tool accessories used to hold and precisely position a workpiece for machining operations such as milling, drilling, and grinding. They are characterized by their ability to rotate a workpiece around a fixed axis, allowing for the machining of multiple surfaces or features on the same setup.

The primary function of a rotationstisch is to divide a circle into a number of equal or specific angular divisions. This is achieved through a mechanism that allows for controlled rotation and locking at precise angles. Early designs often relied on manual indexing pins and dials, while modern rotationstische frequently incorporate motorized drives and electronic controls for greater accuracy and automation. These can be driven by a stepper motor or servo motor, enabling continuous rotation or precise indexing.

Rotationstische are essential for creating complex geometries, such as gears, splines, and radial hole patterns. They can be mounted vertically or horizontally onto a machine tool's table, offering flexibility in machining setups. Some advanced rotationstische are also designed to tilt, providing additional degrees of freedom for multi-axis machining. The accuracy and rigidity of a rotationstisch are critical factors in achieving high-quality results, as any play or inaccuracy can be directly transferred to the workpiece. They are widely used in industries requiring high precision, including aerospace, automotive, and medical device manufacturing.