Clamping/Gripping Specialties


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At EMO 2013 in Hall 3, Booth H21, Schunk will show the TRIBOS-Mini, which directly clamps the smallest of tool shanks consistently along the entire axis. Machining medical, dental, and micro level parts are the most challenging applications faced today. This innovative toolholder from SCHUNK eliminates troublesome collets, collet nuts, and inconsistent tool clamping, the company notes.

With a run-out accuracy of less than 3 microns and a balance grade of G2.5 at 25,000 RPM, high RPMs and fast feed rates are achievable. Unique in the proven TRIBOS design is the direct clamping through the elasticity of the tool holder material, according to the company. The patented TRIBOS technology utilizes a polygon form in the clamping bore to generate the clamping.

Cutting tool clamping results are simplified without the influence of an operator. The holder is inserted into the TRIBOS press and the cutting tool is released in less than 30 seconds. Manual mounting and changing of tools in TRIBOS-Mini toolholders and TRIBOS-Mini extensions has never been so efficient. The new SVP-Mini clamping device enables SCHUNK-Minis to be clamped simply for micromachining as far as the back stop, saving time and significantly reducing set-up costs, the company states.

This handy and compact clamping device is distinguished by its simple handling and covers the entire TRIBOS-Mini range (D2-dimension 9 mm) without any additional reduction inserts. This not only makes it a low-cost acquisition but economical as well. The SVP-Mini can be fastened both horizontally and vertically to the workbench while direct clamping and unclamping on the spindle are also possible.

The clamping of thin-walled and easily deformed components is challenging. With the ROTA NCR 6-jaw compensation chuck, SCHUNK offers a standard solution for this type of workpiece. SCHUNK has standardized the sizes of the ROTA NCR with diameters up to 1200 mm—opening up the possibilities for precision workpiece clamping with large lathe chucks.

The ROTA NCR consists of a central chuck piston, which has three inner pendulums positioned at 120°. Each pendulum works in conjunction with three pairs of base jaws, resulting in 6-point contact. With clamping force points being aligned towards the chuck center of rotation, even pre-machined parts can be centered without deformation of the workpiece. The ROTA NCR is available in sizes 165, 200, 250, 315, 400, 500, 630, 800, 1000 and 1200 mm diameters.

SCHUNK’s ROTA NCR chuck offering can be utilized on virtually any turning application. It also offers the possibility for air and coolant feed through.