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Due to the different tool clamping methods, a large number of factors such as dimensional accuracy, surface quality, replacement time and tool wear will be affected. Therefore, the tool holder has a direct impact on the quality of the workpiece and the processing cost. In the cutting process, the tool holder is the key interface between the tool and the machine tool. In various processing occasions, whether the right handle is selected will affect many factors.

Due to the different tool clamping methods, a large number of factors such as dimensional accuracy, surface quality, replacement time and tool wear will be affected. Therefore, the tool holder has a direct impact on the quality of the workpiece and the processing cost. In the cutting process, the tool holder is the key interface between the tool and the machine tool. In various processing occasions, whether the right tool holder is selected will affect many factors, such as: dimensional accuracy, surface quality, replacement time and tool wear, which ultimately affects the quality and cost of the processed workpiece.

As there are different machining occasions, there is no one tool handle on the market that can be applied to all machining needs. Therefore, with the development of processing technology, SCHUNK has developed five different high-precision tool holder systems for more than 30 years. With these sets of tool handles, you can meet the needs of users for various cutting tasks. Its applicable industries from the electronics, watches and clocks industry micro-machining to metal cutting high-speed machining (HPC/HSC) a comprehensive range; both high-value high-precision tool holder, but also cheap and suitable for large cutting amount of processing tool holder.

The clamping rotation accuracy determines the dimensional accuracy of the workpiece being processed.

High-precision toolholders, such as TENDO hydrostatic expansion toolholders and TRIBOS stress locking toolholders, have undergone a series of dynamic balance calibrations to achieve high clamping and turning accuracy in addition to high structural size assurance in manufacturing. With this feature can not only improve the quality of the workpiece, but also greatly reduce the processing costs. The machining costs thus incurred are significantly lower than conventional machining costs, since the use of high-precision tool shanks extends the service life of the tool. Compared with the traditional spring tool holder, TENDO static pressure expansion clamping technology (Figure 2) and TRIBOS stress locking clamping technology (Figure 3) can save up to 27% of the cost due to the reduction of tool wear.

SCHUNK's high-precision tool holder system has extremely high clamping and turning accuracy, and the user can accurately handle the workpiece when using it.

Machining and achieving extremely high dimensional accuracy. Although the heat shrinkable handle and high precision spring handle can also achieve high clamping rotation accuracy at the factory, there are still differences due to different clamping technologies. Experiments show that the heat shrinkable tool holder will gradually lose the clamping accuracy due to the influence of thermal expansion of its material. However, TENDO, which relies on the deformation of the hydrostatic oil chamber, or TRIBOS tool holder, which is clamped by the stress deformation of the material at normal temperature, can still keep the radial rotational runout not exceeding 0.003mm after many tool changes.

In terms of vibration damping, the values of each tool holder system of SCHUNK reflect a very wide range of adaptability. Among them, TENDO static pressure expansion tool shank and TRIBOS-R type stress locking tool shank are particularly prominent. TENDO static pressure expansion tool holder through the structure of the oil chamber wall of the symmetrical clamping tool, by using a hex wrench to tighten the pressure bolt, the pressure is evenly transmitted to the oil chamber of each part. The inner wall of the oil chamber is compressed evenly and symmetrically to expand in the direction of the axis, thereby clamping the tool. With each clamping and loosening, the pressure bolts are fixed to reach the same position, ensuring the requirement of repeated clamping accuracy. Since the vibration damping of oil is greater than that of steel, the TENDO tool holder also has extremely high damping characteristics. Similarly, the TRIBOS-R-type stress-locking tool holder uses a cavity structure filled with plastic damping material, and also has similar damping characteristics, so as to achieve a very quiet processing effect. The SINO universal handle has similar advantages because it is lined with plastic material.