TRIBOS Precision Tool Holders are available for HSK-E 20 interface.

Press Release Summary:

TRIBOS Precision Tool Holders are available in Mini and RM series models. Designed for high-speed spindle interface and micro applications, TRIBOS-Mini models are standardized with 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 6 mm, and 1/8 in. diameters. Available with 3 mm, 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, and 1/8 in. diameters, TRIBOS-RM models can be combined with TRIBOS-SVL Mini tool extension and comes with L1 dimension of 78 mm.

Original Press Release:

SCHUNK Expands Micro-Machining Products

TRIBOS polygonal clamping technology has been setting standards in high-precision micro machining for many years. Numerous companies in medical and dental technology, watchmaking, and jewelry, as well as mold making and optical engineering have put their confidence in SCHUNK’s patented toolholding system. Due to the high demand, SCHUNK has now further expanded the line of precision toolholders.

The SCHUNK TRIBOS-Mini, designed for micro applications, is now available for high-speed spindle interface HSK-E 20. Compared to conventional steep-angle taper interfaces; the HSK-E 20 ensures exact contact of the toolholder, which allows outstanding change and positioning accuracy. In addition, the close tolerances of the tapered seat result in maximum precision and superior running smoothness at high speeds.

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 can also be used for applications with very high requirements for dimensional stability and surface quality.

For multi-axis machining centers, SCHUNK has modified the robust 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 of smaller shank diameters. For machining of hard-to-access areas, the toolholder can also be combined with the standardized TRIBOS-SVL Mini tool extension. The universal 5-axis expert is available for the interfaces HSK-A 32, HSK-A 40, HSK-E 32, and HSK-E 40. Its shank diameter is 12 mm for all of these interfaces.

TRIBOS-Mini is now standardized with diameters of 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 6 mm, and 1/8’’. TRIBOS-RM with diameters of 3 mm, 4 mm, 6 mm, 8 mm, 10 mm , 12 mm, and 1/8’’. In addition to the existing interfaces HSK-A 25, -A 32, -A 40, -E 25, -E 32, and -E 40, both holders are now available for HSK-E 20 and for BT 30.


SCHUNK is a German family-owned company and global player in one. More than 2,500 employees in 8 plants and 30 directly owned subsidiaries and distribution partners in more than 50 countries throughout the world ensure an intensive market presence. SCHUNK designs and manufactures an unmatched selection of clamping technology and gripping systems.

Media Contact

Clare Welham

Marketing Coordinator


Technical Contact

Matthew Panosh

Tooling Group Product Manager


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