Germany – The quick-change jaw system Pronto from clamping technology and gripping systems specialist Schunk is said to lower set-up time of a complete jaw set to 30 seconds.
That is about 95% faster than conventional solutions, the company claims. A complete system program is now available that optimises the set-up process from the storage of the quick-change set to the jaw change on the machine.
According to the Germany-based company, Pronto combines fine-serrated supporting jaws (1/16" x 90° or 1.5 mm x 60°) with special quick-change inserts, and extends the clamping diameter up to 45 mm in seconds. This is eight-fold over conventional lathe chucks. To achieve a fast and highly repeatable jaw change, the locking of the changing inserts is loosened with an Allen key, the insert is then removed and replaced with another one. This prevents incorrect positioning. When locked, a six-sided form-fit clamping ensures maximum process stability to provide high force and torque transmission. This system is suitable for clamping raw and machined parts, Schunk explained.
Different jaw variants for small, medium and large clamping ranges are available as required by the application. For top jaws, Schunk offers ten hard claw inserts for different diameters and clamping ranges, and three soft changing inserts for finished parts processing. Once they have been turned out, the latter can be re-used repeatedly on the system.
The clamping depth can be varied using workpiece stops, and an adjustment aid simplifies jaw change, the company added. Pronto can be used on serrated lathe chucks, in sizes 200, 250, and 315, regardless of the manufacturer. Its modular design allows for individual component combinations, including the compatibility of the changing inserts with any supporting jaw, as only the position varies.
A specifically developed tool and gear wagon ensures clean storage and fast access to the claw inserts, soft changing inserts, supporting jaws with mounted screws, T-nuts, and adjustment aids.