... QU,QW,QN 3.Guide is simple Slewing gear bearing :Slewing gear bearings are large bearing which can bear a comprehensive load , ... , and guide is simple, easy to maintain. Slewing gear bearing bearing for gear, gear and inside of the analysis, the four contactball ... design, the development, the production of special structure Slewing gear bearing bearing.Model number:013.25.450013.30.500014.30.500013. ...