Igus Tests Plastic Bearings with Wooden Shafts
Wood and plastic? Is that a good combination? The motion plastics specialist Igus has researched the idea in a recent design study and tested the friction and wear behavior of its plastic linear bearings on a wide variety of wood, and the result is impressive. The Igus econ J4 plain bearing has demonstrated its exceptional compatibility with various kinds of wood, opening new possibilities for furniture makers and design engineers when choosing materials.
The iglide J4 made up of as much as 97 percent regranulate material, provides igus with a plastic that has a CO2 footprint of at least 60 percent smaller than a standard bearing. It is a cost-effective, dry-running linear plain bearing with large contact surfaces and has already proven itself as a wear-resistant mating partner on soft shafts such as aluminum and carbon fiber. Now a new material is being added: wood.
Lars Fenger, product developer at Igus GmbH, explains the idea, “We were trying to think through our sustainability concept. We have been working with recyclate in our maintenance-free high-performance plastics for years. We asked how we could replace the shaft material with a sustainable solution, and wood was an obvious choice.”
The Igus solution gives the customer a metal-free, lightweight, cost-effective linear guide. Flexural strength tests were first carried out on different wood types to determine the right type of wood from the diverse selection available.
“We then tested various linear plain bearings on the wooden shafts and compared them with the values on steel shafts. We used the same test equipment and applied the same conditions for all of this. The result was a bit of a surprise,” says Fenger.
Coefficients of friction comparable to those of steel and aluminum