When assembly equipment must be guarded, the best safety measure is one that provides the most protection with the least affect on normal machine operation.
The term plain bearings is a misnomer. True, these bearings are not as mechanically complex as antifriction bearings, but don't let their simplicity fool you.
Center for Clean Products and Clean Technologies University of Tennessee Knoxville, TN http://eerc.ra.utk.edu/ccpct/aboutus.html Center for Sustainable Systems University of Michigan Ann Arbor, MI http://css.snre.umich.edu Consortium on Green Design and Manufacturing
The U.S. Air Force had a problem. It wanted an adhesive for temporarily attaching small test packages to the exterior of a jet without mechanical fasteners.