heavy construction machinery industry using a range of different types of highly specialized mobile machinery,these heavy duty machanical operating in the harshest of environments and need continued low friction work,no reduce the load capacity and minimal adjustment of assembly time,XRB(China bearing manufacturer) developed the sealed spherical roller bearings for construction machinery and spherical roller bearings for vibrating screen,they can operating under harshest environment with large vibration,high vibration frequency,XRB sealed spherical roller bearing are supply spport services for construction machinery manufacturers from domestic and foreign.