High quality on the workpiece can only be ensured with high-quality tool clamping technology. The clamping device must combine consistently high holding forces with high precision. However, these requirements are in the field of increasingly complex work tasks, where the overall system of clamping device and tool must guarantee high machining results in the long term, even under adverse production conditions. For example, the functionality of a clamping device must be guaranteed even under high air and/or material humidity. After all, the machining quality should remain permanently and consistently high and the tool service life should be maximized, and the breakage of the tool and thus damage to the workpiece must also be prevented.

Precise Concentricity with high balancing Quality

With the NiRo collet chuck “Premium”, Leitz has developed a new clamping system with hollow shank taper that combines high changeover repeatability with flexibility and durability. Made entirely of stainless steel, the chuck guarantees corrosion-free surfaces for life, even in high air and material humidity, as well as precise, functionally reliable tool clamping. In order to fully exploit the advantages of the HSK interface, Leitz focuses on precision and accuracy right from the production stage. With a taper angle of two degrees 52 minutes, the OZ collet enables the transmission of higher torques than an ER collet with an eight degree taper angle. The longer taper length of the NiRo “Premium” also offers greater angular stability. At the same time, the ball-bearing clamping nut ensures low friction losses between the nut and collet and enables safe use in clockwise and counter-clockwise operations. In conjunction with the optimized trapezoidal thread and the increased guide length, this should ensure above-average holding forces with a comparatively low tightening torque of 80 Newton metres.

New Key System, slim Design

Depending on the application, the collets of the premium chuck can be exchanged quickly and easily to accommodate a wide variety of drills and milling cutters. The available collets cover the range from six millimetres to 25 millimetres reliably and precisely. Thanks to the machine-side connection via the HSK-F-63 interface, speeds of up to 24,000 per minute are possible. The high concentricity and balancing quality of the NiRo “Premium” should guarantee a long service life for the tools used and permanently high machining quality on the workpiece. In addition, the collet chuck is characterized by a particularly slim design, which improves accessibility to the workpiece and - thanks to the reduced interfering contour - allows optimized 5-axis machining. Leitz has also redesigned the key system of the “Premium” for easy mounting of collets and tools. The optimized key surfaces not only ensure safe operation during clamping and unclamping, but according to its developers, the contour of the system is also up to 15 percent slimmer than comparable chucks.