The oil-free bushing is a large class, divided into more than 10 kinds of small classes. The double metal bushing is a class. The sintered bronze bushing is a small category in the double metal bushing. It is simply to convert the copper mist into very fine small particles, mixed with a small amount of zinc, tin, etc., evenly spread on the steel plate, into the sintering furnace, and use the copper powder at high temperature. The particles are sintered on the steel plate and are then refined to ensure that the thickness is uniform. The bushing made of this sheet is a sintered bronze bushing, called a double metal bushing or a bimetallic oil free lubricating bearing.
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