... .Roller shaft turning:Use CNC lathe to machine the groove ensure exactitude and smooth.Welding Inspection:After the bearing house welding ... SKF, NSK, HRC, LYC,ZWZ brand and the sealing type have ZZ, 2RS, RS and so on . Bearing & Sealing Press:Both end ... 5 mm219150-3500308 310more than 5 mm Supply high quality belt conveyor roller frame, roller support, roller bracket with hot galvanized in machinery