Full complement cylindrical roller bearings are designed to withstand heavy loads. At the same width, this type of bearing has a very high load-bearing capacity compared with the traditional type of bearing with a cage. The radial cross-section is small, which can save space, but the speed is relatively low. In order to make the bearing work normally, under continuous operation, the bearing must bear a certain minimum load, that is, C / P <25. Otherwise, insufficient lubrication and high-speed operation will cause severe wear All multi-row cylindrical roller bearings have a lubrication groove and lubrication hole on the outer ring.