JINING QINFENG MACHINERY HARDWARE CO.,LTD
JINING QINFENG MACHINERY HARDWARE CO.,LTD
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July 12, 2019

HSK tool holder standard

Hsk Tool Holder standard is DIN69873 in Germany. There are six standards and specifications, namely HSK-A, HSK-B, HSK-C, HSK-D, HSK-E and HSK-F. There are three commonly used standards: HSK-A (automatic tool change with inner cooling), HSK-C (manual tool change with inner cooling) and HSK-E (automatic tool change with inner cooling, high speed).


The general TOOL HOLDER of 7:24 is connected by the 7:24 taper of the Tool Holder and the 7:24 taper of the spindle hole of the machine tool. It has limitations in three aspects: high-speed machining, connection rigidity and coincidence accuracy. The elastic deformation of HSK Tool Holder depends on the tool holder, which not only contacts the 1:10 conical surface of the tool holder with the 1:10 conical surface of the spindle hole of the machine tool, but also makes the flange surface of the tool holder closely contact with the spindle surface. This double-sided contact system is superior to the 7:24 tool holder in high speed machining, connection rigidity and coincidence accuracy.

HSK tool holder has a variety of specifications, such as A, B, C, D, E and F. Among them, A, E and F are commonly used in machining centers (automatic tool change).

The biggest difference between Type A and Type E is that:

1. Type A has drive grooves while Type E does not. Therefore, relatively speaking, the A-type transfer torque is larger, and some heavy cutting can be carried out relatively. The E-type transmission of the torque is relatively small, can only carry out some light cutting.
2. Besides the transmission groove, there are also manual fixed holes and directional grooves on the handle of type A cutter, so the balance is relatively poor. The E-type is not, so the E-type is more suitable for high-speed machining.

The E-type and F-type mechanisms are identical, and their differences lie in:

Also called E-type and F-type tool holders (e.g. E63 and F63), the cone of F-type tool holders should be smaller than one size. That is to say, the flange diameters of E63 and F63 are both 63, but the cone size of F63 is only the same as that of E50. Therefore, compared with E63, the speed of F63 is faster (spindle bearings are smaller).

HSK tool holder - the maximum bending moment, torque and rotational speed that the tool holder can withstand. These performance data are related to the application conditions, such as clamping mode and clamping force, as well as the materials used to manufacture the tool holder and the heat treatment process. This kind of tool handle has been widely used in our real life.
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