thrust roller bearing is applied to take axaial loads. It has a high load capacity. The housing washer and the shaft washer of it are made of bearing steel. The cage material can be copper base alloy,aluminum alloy,steel.the cylindrical roller thrust bearings made in RTR use copper base alloy as the basic cage material.Aluminum alloy & carbon steel and plastic are also available on the request of the clients.In that case,some special suffix should be appended to the bearing codes to show the difference.