DUNKES - When only the best will do

  • Press stability
  • High availability of presses
  • Core competencies in press
  • Reliable and robust press technology

Hydraulic gantry straightening presses (HRP)

DUNKES has a custom solution for the entire range of straightening technologies from round, flat, to profile materials.

Regardless of whether this involves straightening of simple round parts, or complex profiles that also need to be torsion straightened. Standard straightening presses are supplied as joystick-controlled, semi-or fully automatic plants. DUNKES straightening technology facilitates a significant improvement in the increased quality expectations with respect to run-out accuracy, straightness and torsion.

The plans are configured in accordance with ergonomic considerations, therefore representing improved work methods and forward-looking solutions. A servo control for the ram axis is used for larger straightening forces, in combination with a joystick control due to the improved handling and ergonomics. Precise positioning accuracies are attained due to the servo orientation control.

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Standard configuration

  • Straightening bed with welded steel plate
  • Straightening bed configured above ground
  • Gantry travels under motor power relative to the straightening bed
  • Straightening ram travels under motor power within the gantry
  • Pre-selectable travel speeds
  • Parking position for the gantry outside of the straightening bed to load the straightening bed by means of indoor crane from above
  • Precision joystick control mounted on a hinged operator panel
  • Backstroke limiter
  • Quick change unit for straightening ram compression element
  • Continuously adjustable straightening force pre-selector with manometer display
  • Large digital display of the ram travel
  • Display of the ram travel can be set to "0" (home position)
  • Control panel travels with the gantry
  • Busbar for gantry integrated into the straightening bed


  • Portable, operator radio control
  • Straightening ram with 90° manual swing respectively
  • Straightening supports
  • Lifting cylinders to lift the workpiece (e.g. steel plate), so that the straightening supports can be manually relocated underneath the workpiece
  • Support rails to conveniently placed small workpieces between the lifting cylinders
  • Hardened wear plates on the straightening table
  • Oil drip pan under the gantry straightening press
  • Oil cooler for the hydraulic drive

Links to operational examples