cairo060

I'm an aircraft mechanic. I deal with bearings & bushings all of the time. Roller bearings are for high pressure & rpm applications. Bushings are for high or low pressure & small or slow rotational travel applications. Bushings must be cleaned & lubed often because of the lack of protection from foreign debris. Sealed roller bearings are the opposite. A worn or seized bushing will tear stuff up, like a pivot boss. A worn roller bearing tends to wear itself & the bolt or pin that is riding through it rather than the boss or mounting structure. I don't see how plastic can be better than metal. This article is obviously an infommercial