The SCHUNK TRIBOS-Mini HSK-E 20 polygonal chuck is the first standardized precision toolholder for micro machining with the pioneering HSK-E 20 spindle interface. In comparison to conventional short taper interfaces, the HSK-E 20 interface provides an axially flat work surface for the toolholder, ensuring excellent change and positioning accuracy. Also, the narrow tolerances of the tapered seat ensure maximum precision and superior running smoothness at high rotation speeds.
With a concentricity and repeat accuracy of < 0.003 mm at an unclamping length of 2.5 x D and a balancing grade of G 2.5 at 25,000 rpm, the TRIBOS-Mini HSK-E 20, which is manufactured exclusively at SCHUNK headquarters in Lauffen upon Neckar, fulfills the highest demands. It is suitable for all tool shanks in h6 quality, transmits torque up to 4.5 Nm (at ø 6mm) and makes high rotational speeds of up to 85,000 rpm possible. Like all polygonal toolholders from SCHUNK, the mount has no movable parts, which almost guarantees almost completely maintenance and wear-free clamping. Even after several thousand clamping rounds there are no signs of material fatigue on the toolholder. Both the precision on the workpiece and the service life of the tools benefit from the excellent concentricity properties. Since even extremely small shanks can be clamped, there is no need for time-intensive and expensive special tools. Process reliable tool changes can be done in seconds with the help of a hydraulic clamping device. The micro specialist is available for ø 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm, 4.0 mm, 6.0 mm and 1/8’’. The L1 dimension is 35 mm. In addition, smaller shank diameters of 0.3 mm and up, intermediate sizes, and other special designs are possible.