Каталог оснастка Dormer Pramet 2016 - страница 263

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HYDRAULIC EXPANSION CHUCKS

Modern machining processes place heavy demands ful tool clamping and precise concentricity. A safe and on tool holding. Hydraulic expansion chucks provide powerful fit is guaranteed.

excellent clamping characteristics combined with pre-If reduction sleeves are applied that are able to
cise concentricity. Furthermore, they enable a simplehold varying tool diameters, the tool application may
and fast tool change.be extended without problem. If such sleeves are not
Turning the pressure screw generates sufficient pres-applied, it is essential to observe the minimum clam-
sure in the pressure chamber resulting in an elasticping length!

deformation of the clamping bush, providing power- Advantages

  • precise tool clamping with a maximum 3 μm deviation from concentricity
  • transmission of high torque through (excellent clamping) optimised bush clamping system
  • high speed compatibility (no centrifugal forces from clamping segments)
  • precise concentricity, therefore excellent surface quality and dimensional accuracy of the workpiece
  • rapid tool change thanks to simple operation of the clamping screw
  • optimal tool life
  • hydraulic cushioning has vibration absorbing effect

Clamping standard tool shanks to DIN 6535 in hydraulic expansion chucks

Form HA Ø 6 ... 32 mm Form HB Ø 6 ... 20 mm Direct clamping of tool preferred run-out ≤ 0.003 mm

Form HB Ø 25 ... 32 mm Form HE Ø 6 ... 32 mm Clamping of tool shank only with reduction bushes run-out ≤ 0.005 mm