Tendo Slim 4ax Cool-Flow Toolholder

December 02, 2019
Tendo Slim 4ax Cool-Flow Toolholder

Three years ago, SCHUNK launched the slim hydraulic expansion toolholder Tendo Slim 4ax, which received great attention. Its precision mounting combines the outside geometry of heat shrinking mountings according to DIN 69882-8 with the proven qualities of SCHUNK hydraulic expansion technology. The company now launches a version with cool-flow technology that allows for highly effective cooling via tool mountings.

The Tendo Slim 4ax cool-flow toolholder offers various advantages when it comes to machining of steel, aluminum, and plastic. The coolant or water jet does not depend on the unclamped length and always optimally adapts to the metalcutting process. In contrast to heat shrinking mountings, the jet of the Tendo does not bounce back along the whole unclamped length of the tool shank, but instead fully surrounds the tool shank up to the cutting edge. This is a benefit for cooling the cutting edge, improving the chip removal, and increasing efficiency of the overall process. Pilot applications in the field of tool making show that the vibration-absorbing mounting cool-flow technology particularly pays off in the form of an excellent surface quality when roughing, pre-finishing and finishing. Moreover, reworking measures and tool costs are reduced.

In contrast to heat shrinking toolholders, the Tendo Slim 4ax seamlessly fits into the proven program of hydraulic expansion technology from SCHUNK with its permanently precise runout accuracy of < 0.003 mm at an unclamped length of 2.5 x D, and a balancing grade of G 2.5 at 25,000 rpm. Moreover, the shape and positional tolerances can be met precisely. Like all SCHUNK Tendo hydraulic expansion toolholders, the Tendo Slim 4ax is also proven in terms of perfect vibration damping and a rapid tool change by using an Allen key. Investments into expensive peripheral equipment are not required. Since the precision mounting of conventional heat shrinking toolholders can be easily replaced by Plug-&-Work without having to reprogram the outside contour, their advantages can be directly tested or permanently used. The slim mounting with cool-flow technology will be available in the lengths of 90 mm and 120 mm for the interfaces HSK-A63 between ø 6 mm up to ø 32 mm. The interfaces for SK 40 with ø 6 mm up to ø 32 mm will be available in mid-2020. Further interfaces such as BT 40 and length variants with 160 mm are being planned.

Related Glossary Terms

  • coolant


    Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.

  • metalcutting ( material cutting)

    metalcutting ( material cutting)

    Any machining process used to part metal or other material or give a workpiece a new configuration. Conventionally applies to machining operations in which a cutting tool mechanically removes material in the form of chips; applies to any process in which metal or material is removed to create new shapes. See metalforming.

  • shank


    Main body of a tool; the portion of a drill or similar end-held tool that fits into a collet, chuck or similar mounting device.

  • toolholder


    Secures a cutting tool during a machining operation. Basic types include block, cartridge, chuck, collet, fixed, modular, quick-change and rotating.