Currently used steel rollers, which have weld steel pipe and seamless steel tubes for the two kinds . As individual parts , roller tube almost never fail , its long life , high security , however , through the comprehensive analysis of idlers that, as a steel roller tube , while not easy to break , but as a roller tube , its concentricity, straightness, and other precision radial runout roller often reach the technical requirements from this sense, the production of steel roller tube is easy to fail , which is inherent reason for poor performance of the steel roller bearing steel rollers also have class 2:. ① cast iron housings ; ② stamping bearing cast iron bearings. Block weight , high manufacturing costs, casting defects and eccentric error prone process quality , increase the running resistance idlers . stamping although the weight bearing has been reduced, but it later with the roller tube welding , difficult to ensure the accuracy of concentricity this is another major factor affecting the performance of the roller . Moreover , under the action of corrosive media , the wall elements in the medium will pipe body roller atoms chemically react to form a metal oxide , an oxide easily into the bearing , resulting in premature failure of roller reason steel roller premature failure is its inherent in order to solve the problem of premature failure of roller fundamentally , this article is intended to replace phenolic composite pipe and steel roller bearings Block , and phenolic composition and properties of the composites were studied.