With the SCHUNK TENDO Slim 4ax hydraulic expansion toolholder it is now possible to combine the complete outside geometry of heat shrinking mountings according to DIN 69882-8 with the proven qualities of SCHUNK hydraulic expansion technology. The slim precision mounting makes it ideal for use in series production, particularly in the automotive industry. It was particularly designed for axial operations, and shows its strength during milling close to interfering contours, countersinking, and reaming in 5-axis centers and the die and mold industry. Test series prove that the mountings with the vibration-damping properties of the hydraulic expansion technology have considerably improved the process during milling operation. The hydraulic expansion toolholder design reduces peak cutting ¬amplitude of the force progression in Y-direction, which results in less deflection of the tool. By reducing the load of the cross cutter and the cutting edge, considerably longer service life can be achieved. Additionally, the user benefits from having exact gauges for holes and maximum precision at the workpiece.

Easy exchange via Plug & Work

As with every SCHUNK TENDO hydraulic expansion toolholder, the SCHUNK TENDO Slim 4ax also has permanently high run-out accuracies, perfect vibration damping, and a fast tool change with a wrench. Even narrow shape and position tolerances can be met precisely, therefore investments in high-priced peripheral devices are not required. Since the precision mounting can replace conventional heat shrinking toolholders by Plug & Work without having to reprogram the machine, the benefits can be tested in a real application. SCHUNK TENDO Slim 4ax can be used without expensive peripheral devices. The MQL-capable mounting is dirt-resistant and is extremely low-maintenance. In contrast to the heat shrinking toolholders, it has a permanently high run-out accuracy of < 0,003 mm at an unclamped length of 2.5 x D and a balance grade of G 2.5 at 25,000 rpm, the SCHUNK TENDO Slim 4ax seamlessly fits into the proven hydraulic expansion toolholder program from SCHUNK. In the first step, the mountings are available for the interfaces HSK-A63 with ø 10 mm/L1=120 mm, ø 12 mm/L1=90 mm, ø 12 mm/L1=120 mm, ø 14 mm/L1=90 mm, ø 14 mm/L1=120 mm, and ø 20 mm/L1=90 mm. Further variants with ø 6 mm bis 32 mm and L1-dimension of 90 mm, 120 mm, and 160 mm are already planned.

The SCHUNK high-performance hydraulic expansion toolholder TENDO Aviation was developed especially for demanding applications with a requirement for mechanical tool locking, for example in the field of aviation and aeronautics. For tools with a standard Weldon shank, the integrated pull-out protection ensures form-fit clamping of the oriented tool and prevents micro creep movements. Due to the large demand, SCHUNK is expanding the product line in time for EMO.

Benefits of two clamping systems
SCHUNK TENDO Aviation combines the strengths of hydraulic expansion technology with those of Weldon mountings: the impressive features include permanently high run-out accuracy, perfect vibration damping and quick tool changes with the use of an Allen key. Even jobs with demanding tolerances can be maintained with high precision. The potentials of the tool and the machine can also be fully utilized. SCHUNK TENDO Aviation enables a maximum torque transfer with continuously high precision and process stability. It offers considerable advantages over traditional Weldon mountings and heat shrink toolholders whose run-out precision diminishes over time. It prolongs the life of the tool cutting edge, and increases the tool life travel all while producing brilliant surfaces. In addition, the even load profile increases the life of the spindle and spindle bearing.

Especially efficient
Like all SCHUNK hydraulic expansion toolholders, SCHUNK TENDO Aviation needs no additional peripheral equipment, which can be expensive. The clamping diameter is flexible and can be reduced by means of intermediate sleeves, which allows the same toolholder to be used for different shank diameters. Unlike ER collet chucks or heat shrink mountings, the affordable high-end toolholder is resistant to dirt, and features a low-maintenance design. To increase the life of the toolholder while ensuring maximum process stability in sensitive processes, the precision toolholder can be inspected by SCHUNK Service in performance checks and optimized, if necessary. It can be used for machining of turbine blades or fuselage frames in the aviation industry, turbochargers rotors and steering wheels in the automotive industry and titanium- or nickel-based alloys in metal processing. The precision toolholder, which is manufactured exclusively at the SCHUNK headquarters in Lauffen, Germany, is available for the interfaces HSK-A63, HSK-A100, SK-40, BT-40 (ø 20 mm and 32 mm) as well as SK-50 and BT-50 (ø 20 mm; in addition, ø 32 mm is planned).