East Providence, RI- Plain polymer bearing performance doesn't have to depend so much on the composition of the shaft. Instead, new Polymer-Encased-Polymer (PEP) bearings from igus inc. diminish the influence of the shaft material by combining concentric sleeves of self-lubricating polymers into a single closed bearing.
The PEP's stationary inner sleeve acts as the mating surface to the shaft, while the outer sleeve rotates.
By carefully matching different polymer compounds for the inner and outer sleeve, igus can tailor the bearing wear and coefficient of friction characteristics. At loads up to 725 psi, the bearings offer a coefficient of friction of 0.12 to 0.2-versus 0.08 to 0.3 for polymer and steel.
The company offers the bearings for a variety of rotary-movement applications, including ones served by closed ball bearings. ID sizes range from 6 to 20 mm and are designed for press-fit installation with a recommended tolerance of H7.
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.