SCHUNK PRISMO3: variable precision toolholder for automated tool grinding

The fully automated SCHUNK PRISMO3 grinding toolholder is a high-precision all-round solution for automated production grinding and sharpening of tools.



By means of direct clamping, i.e. without the use of collet chucks or intermediate sleeves, SCHUNK PRISMO3 steplessly clamps all shank diameters between 3 mm and 20 mm on the fly. The clamping repeat accuracy is permanently ≤ 0.005 mm and the run-out accuracy is ≤ 0.01 mm at an unclamped length of 45 mm. During the clamping process the tool shank is automatically centered in the toolholder. An optimized contour assures that the grinding wheel can run out unimpeded, even in demanding operations. In comparison with conventional multi-area grinding toolholders, the set-up time is reduced by up to 75%. In addition, users save by not having to invest in intermediate sleeves and collet chucks. Since the X-axis always remains unchanged, regardless of the tool diameter, which means all clamping jaws remain in the identical axial position, it is possible to machine a broad range of drilling, reaming and milling tools around the clock in unmanned operation without reprogramming the L1 measurement, even when working with small quantities. The expense of additional programming and the danger of a crash due to unnoticed axis misalignment are therefore eliminated.

Compact dimensions and durable design

The layout, the base sleeve and the robust construction give the toolholder its exceptionally high rigidity. Its sturdy jaw guides prevent the grinding discs from swinging up and almost completely eliminate axial eccentricity. The chuck jaws are hard-coated and therefore very robust and durable. Nevertheless, if the jaw set is ever damaged, it can be replaced as a unit. In order to prevent dirt accumulation and to permanently maintain the high precision, the chuck is flushed with clean oil during the grinding operation. Whether for axial clamping cylinders, radial rear-end toolholders or custom machine interfaces: SCHUNK PRISMO3 is compatible with the grinding machines of all renowned manufacturers. Compact dimensions of 125 mm x 125 mm leave ample space for the tools, grinding process and loading. The precision grinding toolholder is available starting immediately.