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Press Release 2008 - Lathe Chucks
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Hybrid Chuck Boosts Productivity for Grinding and Turning
09.09.2008 -
Users benefit from the synergy of centring chuck and magnetic clamping technology
Two technologies in one: the ROTA NCM from SCHUNK combines a classic centring chuck and a round magnetic clamping plate. This synthesis has a tangible result: ROTA NCM reduces set-up times for pneumatically actuated grinding and turning machines by up to 80 percent, thereby providing a clearly perceptible productivity boost. But that is not everything. Due to the large-surface clamping, the workpieces retain their shape. Machining can take place from as many as three sides, completely free of vibration and deformation.
Completely deformation-free clamping
This highly effective hybrid chuck is the latest development from SCHUNK's lathe chuck specialists, based in Mengen, Germany. Whereas classic 3 or 6 jaw chucks always exert a radial force on the workpiece, which can lead to deformation, ROTA NCM uses magnetism to clamp the workpiece over a large surface, thereby avoiding any distortion.
Centred in seconds
Unlike classic magnetic discs, ROTA NCM centres the workpiece in seconds. Previously, operators had to align workpieces manually with a dial gauge in a complex operation; SCHUNK's hybrid chuck now completes this task in a fraction of the time with maximum precision. This rules out operator errors, increases reliability and noticeably improves the workpiece quality. Productivity can be increased considerably due to the significantly reduced machine downtimes. This well designed chuck enables completely automated grinding machine operation. It opens up the way for rational mass production. ROTA NCM is also suitable for hard and precision turning.
Secure grip thanks to permanent magnets
The clamping process in this innovative clamping solution is easy to understand and simply designed. The workpiece is inserted manually or automatically, centred precisely to a reference value by three or six chuck jaws and then securely clamped by the electro-permanent magnets. All that is required to activate and deactivate the magnets is electrical current. During the machining itself, the permanent radial pole magnets provide a completely secure grip on the workpiece without any electrical current. The magnets can be activated with varying output categories. The entire clamping process can be fully automated.
Completely sealed
The chuck's maximum gripping force and speed depend on the geometry of the workpiece and the material used. They are calculated individually for each application. The workpiece can be centred by three or six chuck jaws, either from inside or outside. In addition to the magnetic clamping, the chuck jaws can also be used to assist the clamping force. The completely sealed ROTA NCM hybrid chuck is available in sizes from 400 to 1600 mm.
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