Straight bronze bushings (also called bronze bushings, bronze bearings, bronze bushings) is a very critical part of the mechanical equipment in the copper fittings. His role is to: a, reduce the equipment in operation in the sliding friction, reduce power loss; b, greatly increase the service life of running equipment in the wear parts, reduce repair and maintenance costs, and strive for higher equipment utilization; c, effective protection of its contact with the steel parts are not subject to wear and tear, when the copper parts are worn out and easy to replace.