Precision Toolholder Lines Get Improvements, Expansions

Schunk’s Tribos-Mini precision toolholder, designed for micro applications, is now available for the HSK-E 20 high-speed spindle interface. Compared to conventional steep-angle taper interfaces, the HSK-E 20 ensures exact contact of the toolholder, which promotes change and positioning accuracy. In addition, the close tolerances of the tapered seat result in maximum precision and superior running smoothness at high speeds, the company says.

In combination with this line expansion, Schunk has made improvements in other interfaces as well. The Tribos-Mini and Tribos-RM series with the interfaces HSK-E 25 and HSK-E 32, starting with clamping diameters of 0.5 mm, are now optionally available in fine-balanced versions with a balancing grade of G 0.3 at 60,000 rpm. Tribos toolholders can also be used for applications with very high requirements for dimensional stability and surface quality.

For multi-axis machining centers, the company has modified the Tribos-RM with an extended L1 dimension of 78 mm. The extra length can be used for many different tasks; in addition to direct clamping, it is suitable for clamping smaller shank diameters. For machining hard-to-access areas, the toolholder can also be combined with the standardized Tribos-SVL Mini tool extension. The universal five-axis extension is available for the HSK-A 32, HSK-A 40, HSK-E 32 and HSK-E 40 interfaces. Its shank diameter is 12 mm for all of these interfaces.

The Tribos-Mini is now standardized with diameters of 1, 1.5, 2, 3, 4 and 6 mm as well as ¹/₈". The Tribos-RM is available in diameters of 3, 4, 6, 8, 10 and 12 mm as well as ¹/₈".