Standard of hsk tool holder

October 17, 2022

The standard of HSK tool handle is DIN 69873. 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 types: HSK-A (automatic tool change with internal cooling), HSK-C (manual tool change with internal cooling) and HSK-E (automatic tool change with internal cooling, high-speed type).

7: The general tool handle of 24 is located and connected by the 7:24 cone of the tool handle and the 7:24 cone of the machine tool spindle hole, which has limitations in high-speed machining, connection rigidity and coincidence accuracy. The HSK tool handle relies on the elastic deformation of the tool handle, which not only makes the 1:10 taper of the tool handle contact with the 1:10 taper of the machine tool spindle hole, but also makes the flange surface of the tool handle closely contact with the spindle surface. This double-sided contact system is superior to the 7:24 tool handle in high-speed machining, connection rigidity and coincidence accuracy.

HSK tool shank has a variety of specifications such as type A, type B, type C, type D, type E, and type F, among which type A, type E, and type F are commonly used on machining centers (automatic tool change).

The biggest difference between Type A and Type E is:

1. Type A has a drive groove while Type E does not. Therefore, relatively speaking, A-type transmission torque is relatively large, and it can be used for some heavy cutting. The torque transmitted by the E type is relatively small, and only some light cutting can be carried out.

2. In addition to the transmission groove, there are also manual fixing holes, directional grooves, etc. on the A type tool handle, so the balance is relatively poor. The E type does not, so the E type is more suitable for high-speed machining.

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

Also called E and F toolholders (such as E63 and F63), the taper of F toolholders should be one size smaller. That is to say, the flange diameters of E63 and F63 are φ 63, but the cone size of F63 is only the same as that of E50. Therefore, compared with E63, the speed of F63 will be faster (the spindle bearing is smaller).

Hsk tool handle -- the maximum bending moment, torque and the maximum rotating speed that this tool handle 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 handle and heat treatment process. The handle has been widely used in our real life.

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