Fast and flexible clamping

The jaw quick-change system can be retrofitted on any lathe chuck regardless of the manufacturer or design. It allows high flexibility and short set-up times of just 15 seconds for a complete set of jaws. The operator can mill the customised required workpiece contour into the soft Schunk Pronto prism jaws himself.

Alternatively, configured jaws, based on the workpiece data of the individual prism jaws can be machined and delivered by Schunk on short notice. For raw parts clamping, the prism jaws are additionally equipped with Schunk claw inserts.

In combination with the Schunk Pronto support jaws, Schunk Pronto prism jaws can be used very flexibly. For a fast jaw change, all that is needed to loosen the locking is an Allen key, to remove the clamping insert from the prism jaw, and to replace it by another clamping insert. During jaw change an incorrect positioning on the serration can be prevented. Excellent repeat accuracy of 0.02 mm allows for less time reboring inserts and turned or milled clamping inserts can be used again. In the locked condition, a six-sided form-fit locking ensures maximum process stability and allows a high force and torque transmission.

Schunk Pronto supporting jaws are available in two mounting variants: fine-serrated (1/16” x 90° or 1.5mm x 60°) for conventional lathe chucks, or with straight or angled serration for implementing the Pronto system on modern quick-change chucks. The supporting jaws can be combined with different quick-change inserts, such as soft jaws, claw jaws, or prism jaws.

By using the quick-change inserts, the clamping insert can be enlarged with soft jaws by up to 55mm, or with claw jaws up to 45 without having to change the base jaw’s position. In turn, prism jaws allow maximum flexibility of the workpiece geometry.

With the Excel-based Pronto configuration tool, which is available free, the selection and positioning of the supporting and changing inserts is simple. The tool automatically determines the required changing inserts and correct position of the supporting jaws after input of the chuck type and the workpiece diameter.

The jaw quick-change system can be retrofitted to every three-jaw chuck for sizes 200, 250/260, 315, and various two, four and six-jaw chucks. The modular design allows an economical combination of individual components. Every changing insert is compatible with every supporting jaw.

As an option, a set-up cart is available, which ensures clean storing and fast access to claw inserts, soft changing inserts, supporting jaws with assembled screws and T-nuts and adjustment aids.

Schunk www.gb.schunk.com