... roller, Top roller 2. Excavator and Bulldozer undercarriage parts:Track chain, Track shoe, Sprocket& Segment, Idler, Track roller, ... the secondary tough stone and rock.Q460+WH60A+WELDOX960Adaptor plate and side plate are made of material NM360, material Q345B for ... and rock.Rock BucketQ460+WH60A+WELDOX960Consolidated plate on the base, enhance the thickness of side plate, and install protective board, ...