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Schunk’s new Rota-M Flex 2+2 chuck jaw is designed to provide a longer compensation stroke than other available four-jaw chucks on the market. Depending on the size, it amounts to 5.1 mm up to 10 mm per jaw. According to Schunk, the result is increased flexibility for clampable workpiece geometries and a variety of possible applications. In many cases, a single Rota-M Flex 2+2 chuck is capable of covering a wide range of part geometries.

Grease rinse out and gradual loss of clamping force is prevented with special seals on the guideways. Schunk claims that even in instances of low clamping forces, precise functioning of the chuck is ensured. The sealings also protect the chuck body against chips and dirt, increasing process safety and extending maintenance intervals.

The Schunk Rota-M Flex 2+2 clamps in a self-locking manner, and the clamping condition is signaled via indicating pins. The standard chuck sizes 260 to 1200 achieve jaw strokes from 9.5 mm to 17.8 mm and high clamping forces from 100 kN to 180 kN.

The chuck face is equipped with grooves, and fixed stops enable the chuck to also be used as a vise. In addition, the large sizes are designed for use on vertical lathes. The Schunk Rota-M Flex 2+2 comes equipped with a flexible serration (1.5 mm × 60° or 1/16" × 90°).