Cellular Plastic Buffers

Excellent damping properties and maximum energy absorption – ideal for mechanical engineering, crane and material handling applications

Product features:

  • Cellular plastic buffers made of foamed, glycol-crosslinked polyurethane
  • Excellent damping properties with maximum energy absorption
  • Uniform compression set behavior
  • High volume compressibility with low transverse strain
  • Good resistance against UV and high-energy radiation, ozone, mineral oils and lubricants
  • Suitable for temperatures ranging from –40°F to 176°F (–40°C to +80°C)

DUREL cellular plastic buffers – unsurpassed quality for the industrial sector, for example for mechanical engineering, crane and material handling applications

Elastomer buffers are subject to natural aging caused by ozone, UV radiation or hydrolysis. They need to be inspected regularly for signs of aging, for example during an annual crane inspection. Due to varying environmental conditions no general statements about the expected service life of this product can be made.

The diagrams below illustrate the hydrolysis aging of polyester urethane when stored in water that is heated to 176°F (80°C).

In polyester-based polyurethane, however, hydrolytic damage progresses very slowly at room temperature.

We guarantee the high DUREL quality standards that our customers have come to expect from us for all products in our portfolio. In addition, we exclusively continue to distribute part of the proven and familiar “NO 16xxx” and “NO 20xxx” buffer and accessory product ranges formerly sold by RIW Maschinenbau GmbH that are compliant with relevant DIN standards or RIW factory standards. Each component conforms to the corresponding RIW factory standard.

For dimensions and technical specifications, please refer to the PDF documents in the “DOWNLOADS” section.

If you have any questions or would like to receive application-specific advice, please contact the appropriate person directly. The contact details for this product are shown in the box on the right.


Following the acquisition of the buffer and accessories product range of former RIW Maschinenbau GmbH in 2015, DUREL continues to deliver RIW’s proven quality while maintaining the highest safety standards.