Sl04 (nnf... Ada2lsv) double row full loaded cylindrical roller bearing has two inner rings, which are connected by clamping rings and cannot be separated. The outer ring has a middle retaining edge, which can bear two-way axial load and is used as a positioning bearing. Due to the large distance between the two rows of rollers, it can also bear overturning torque. There are two stop grooves on the outer ring surface, which can be positioned axially. Both sides of this type of bearing are equipped with contact sealing rings, which are internally equipped with lithium grease. The operating temperature is limited to - 40 ℃ ~ + 80 ℃. Under certain conditions, this type of bearing does not need maintenance, but when there is water vapor or pollution during operation, and it is often in medium or high-speed operation, it must be lubricated. In the case of oil lubrication, the sealing ring shall be removed and the lubricating grease in the bearing shall be cleaned. When oil lubrication is used, the speed shall be increased by 30%.