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Tool clamp \ Technical introduction – tool chucks

ATORN hydro expansion chucks — advantages

our hydro expansion chucks or HPH (High Performance Holders) with axial and radial length adjustment are used on woodworking and metalworking machines with
rotating tools. depending on the type of use, various versions are available, e. g.:
 automatic tool change chucks in acc. with: ISO 7388-1 (DIN 69871); DIN 69893-A, DIN 69893-F, DIN 69893-E and ISO 7388-2 (JIS B6339)
Advantages of the ATORN hydro expansion clamping technology:
 Tool change in the shortest possible time
 High concentricity
 Vibration-damping tool clamping
 Increased tool service life
 Reduction of micro abrasions on the tool cutting edge
 Improvement in surface quality
 Reducing sleeves allow fl exible use
 Low maintenance requirements through closed clamping system
 Easy operation
 High torque transmission
 Design corresponds to DIN 69882-7
 High positioning accuracy and repeatability
 Tool clamping with excellent concentricity (maximum 3 m)
 Continual further development ATORN 3 degree hydro expansion chuck
 Products certifi ed according to DIN EN ISO 9001:2008, manufactured in Germany ultra-slim 3D-printed design

ATORN hydro expansion clamping technology — elements and functional principle

Elements of the hydro expansion clamping technology: 7 1 4 5
① Sealing element; leakage at the clamping bore is prevented by the sealing lip.
② Clamping piston; presses the hydraulic medium into the chamber system.
③ Clamping screw; tightening to operate the clamping piston can be done without a torque wrench.
④ Expansion sleeve; clamps the tool sha centrally with even pressure.
⑤ Chamber system; is formed through the connection between expansion sleeve and basic body. Has a
dampening eff ect on the tool through the hydraulic medium, which therefore reduces wear.
⑥ Groove; residual oil, grease or lubricant is forced into the groove by the high clamping pressure. The
clamping surfaces remain largely dry, which ensures proper transfer of torque.
⑦ Basic body; ATORN hydro expansion chucks are available for all common machine interfaces (HSK-A,
HSK-C, HSK-E, HSK-F, SK, BT and fl ange module).
2 3 6
Functional principle 1 2
When clamping with hydro expansion technology, an even pressure is built up within a closed chamber
system by means of a clamping screw and clamping piston. The integrated expansion sleeve transfers this
pressure to the tool.
5
① The clamping screw is screwed in with a hexagon key until it stops.
② The clamping piston pushes the hydraulic medium into the
③ expansion chamber and causes an increase in pressure. 4
④ The thin-walled expansion sleeve curves evenly against the tool sha . In this clamping process, the tool
sha is fi rst centred and then clamped fi rmly over its full surface. 3
⑤ The sealing element ensures a perfect seal and a long service life.

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com
Availability subject to country specific rules and regulations. 552

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