HSK Technology

HSK stands for "Hohl Shaft Kegel", which translates to "Hollow Shank Taper". It is often compared to "Standard Taper" tooling, known as 30 taper, 40 taper etc.
 

• Centrifugal force increases joint strength.
• Centrifugal expansion of the spindle at higher speeds cannot cause increased shank penetration under drawbar force.
• The contact surface of the tool holder will allow for radial and axial repeatability of 0.0001".

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• Centrifugal force decreases joint strength
• Centrifugal expansion of the spindle may occur at higher speeds, causing increased shank penetration under drawbar force. This causes the Z offset of the tool to change.
• When the spindle is stopped, this expansion can cause the tool holder to stick, resulting in tool changing difficulties.
• Axial repeatability is 0.004".

What are the Benefits of HSK Tooling?

• High static and dynamic rigidity

• High tool changing and repeating accuracy

• Low tool runout

• Low tool change stroke and time

• Suitable for heavy duty machining and high speed applications

• Harnesses centrifugal forces to increase joint strength

• Low weight allows for more tool holders in the carousel

• Low load on the spindle bearings

• Adapted for manual and automatic tool changing

• Widely available from multiple vendors, resulting in cost competition and stock items

• Modular systems available (extensions, reducers)