... the distance of flat are the same .Bearing House Welding:Both end welding ensure the bearing house in one line , and concentric .Roller ... ,ZWZ brand and the sealing type have ZZ, 2RS, RS and so on . Bearing & Sealing Press:Both end pressing equipment to press the ... 5 mm The hottest sale rubber disc return idler roller,self cleaning idler roller,comb roller,ball bearing rubber idler roller