News | November 18, 2020

Sealed 2+2-Jaw Chuck With Long Stroke Compensation For Maximum Flexibility On Mill/Turn Machines

Centrically compensating 4-jaw chucks can be used for clamping different workpiece geometries precisely and efficiently: for round or square ones, rectangular or geometrically bulky ones. SCHUNK developed the low-maintenance 2+2 jaw chuck SCHUNK ROTA-M flex 2+2 for meeting the increasing demands of the market. Due to the patent-pending compensating mechanism, it has a very long compensation stroke: Depending on the size, it amounts to 5.1 mm up to 10 mm per jaw – this is more than other available 4-jaw chucks on the market. This means increased flexibility for the users in view of clampable workpiece geometries and a great variety of possible applications. In many cases a single ROTA-M flex 2+2 chuck will be sufficient in future for covering a wide range of part geometries.

Sealed guideways
Special seals on the guideways avoid that the grease will be rinsed out and that the clamping force is gradually lost. Even in case of low clamping forces, precise functioning of the chuck is ensured. At the same time, the sealings protect the chuck body against chips and dirt, process safety increases and maintenance intervals are extended. For increasing safety, the SCHUNK ROTA-M flex 2#+2 clamping is done 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.

Serial extras for large chuck sizes
As of size 800, users benefit from the weight-reduced design, the chuck face is equipped with grooves, and fixed stops allow that the chuck can be also used as a vise. Moreover, the large sizes are prepared for the use on vertical lathes. The SCHUNK ROTA-M flex 2+2 is equipped with a flexible serration (1.5 mm x 60° or 1/16“x 90°) so that the user can fully exploit the benefits of the variety of the world’s largest range of standard chuck jaws from SCHUNK.

Source: SCHUNK