Ranprex® High-Tech Laminated Densified Wood

The Gund Company is proudly the sole distribution channel for RANPREX® in North America.

Ranprex laminated wood insulation for electromechanical applications is extensively used in the oil-filled power and distribution transformer industry. The material complies with the norms DIN7707 & IEC61061, and common 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

Rancan is made in Italy through a process of pressing red beech veneers that incorporates a patented resin at a pre-determined temperature. Through its high-quality products and close work with the major transformer OEMs in the world, Rancan has become the largest producer of laminate densified wood for oil-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 applications

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 11 locations across North America with state of the art machining capabilities such as CNC panel saw, 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.



The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions for transformer applications. We have been in business since 1951 and understand what it takes to serve the transformer market. The Gund Company is an ISO 9001:2015 manufacturer. We are AS9100D Certified and ITAR Compliant. As a LEAN manufacturer, we are focused on Continuous Improvement and finding the most cost-effective, efficient solutions for our customers.

Please feel free to review the additional information below and let us know if we can help answer material property questions or provide an application-specific quote. Thanks in advance for the opportunity to earn your business.