Description

Features: Higher grade of alloy steel materials and strictly controlled chemical composition give consistent heat treatment results; Ball drift calibration after heat treatment and the existence of compressive pre-stress give it optimal ability to resist crack advance; Pin bores of loose plates for connecting links have a slightly conical shape that ends in an iterference fit so that when installed the fatigue resistance of the chain is not reduced. Axis pin, bushing, roller: Optimized carbonitriding heat treatment process allows the axis pin to keep nearly perfect linearity; Bushing and roller formed with extrusion have higher roundness, axiality and surface roughness; Furnace atmosphere is detected and controlled exactly by the heat treatment facilities; Reliable detection methods from specialized laboratories are used.