Ranprex® densified laminated wood insulation for electromechanical applications is extensively used in the liquid filled power and distribution transformer industry. The material complies with the norms DIN7707 & IEC61061, and typical applications for components are:

  • Clamping or Pressure Rings
  • Core Blocks
  • Step Blocks
  • Cooling Plates
  • Lead and Cleat Structures
  • Pressure Beams
  • Fasteners (Threaded Rod & Nuts)
  • Round Spacers
  • Coil Supports
  • Shield Rings
Ranprex electromechanical applications from The Gund Company

The Gund Company manufactures a wide range of insulation components for the various types of transformers. Our application engineering expertise can help our customers understand their insulation material selection and component design options, from large liquid filled transformers to dry type distribution transformers or low-voltage electronics transformers.

Rancan is produced in Italy by pressing red beech veneers that incorporate a patented resin at a pre-determined temperature. Through its high-quality products and close work with the significant transformer OEMs in the world. Rancan is the largest producer of densified laminate wood for liquid-filled transformer applications.


Ranprex® laminated wood offers the following advantages: 

  • Excellent dielectric properties
  • High oil absorption
  • High mechanical properties
  • Suitability to work at high temperatures
  • Dimensional stability
  • Density selections according to your needs
  • Lower cost than other materials used for similar applicationsd

Ranprex ® material is available in the following grades:

Parallel Construction:
P1R / KP20210 / ML22EL
P2R / KP20212 / ML20EL
P4R / KP20214 / ML15EL

Crosswise Construction:
C1R / KP20220 / ML22E
C2R / KP20222 / ML20E
C4R / KP20224 / ML15E

Tangential Construction:
T2R / KP20242 / ML20ET
T4R / KP20244 / ML15ET

The Gund Company has multiple locations across North America with state-of-the-art machining capabilities such as CNC panel saws, mills, and routers.  With stocking locations across the USA, Mexico, and Canada, The Gund Company can guarantee the delivery of raw sheets or finished components with the shortest possible lead time.
 Watch our Router Video Here.