What is a full complement cylindrical roller bearing? Full complement cylindrical roller bearings are designed to withstand heavy loads. Under the same width, compared with the traditional bearing with cage, this kind of bearing has extremely high bearing capacity, and the radial section is small, which can save space, but the speed is relatively low. In order to make the bearing work normally, in the continuous operation environment, the bearing must suffer a certain very small load, that is, C/P<25. Otherwise, the wear will be aggravated due to insufficient lubrication and high-speed operation. All multi-row cylindrical roller bearings have a lubrication groove and lubrication holes in the outer ring. Full complement cylindrical roller bearing type 1. It has two inner rings. The two inner rings are connected by a clamping ring and cannot be separated. The outer ring has a rib, which can bear bidirectional axial load and is used as a positioning bearing. Due to the large distance between the two rows of rollers, overturning moments can also be experienced. There are two retaining grooves on the surface of the outer ring, which can be positioned axially. This type of bearing is equipped with contact sealing rings on both sides and lithium-based grease inside, and the operating temperature is limited to -40℃～+80℃. Under the necessary premise, this type of bearing does not need maintenance, but when there is water vapor or contamination during operation, and it is often operated at medium or high speed, it must be supplemented with lubrication. In places where oil lubrication is used, the sealing ring needs to be removed, and the grease in the bearing should be flushed. 2. It is a non-sealed bearing. The outer ring is integrally split and fixed together by continuous locking pieces, so the outer ring cannot be subjected to axial load. The split outer ring is exactly the same, each with a rib , can be used for axial positioning in two directions. The inner ring has three ribs. The outer ring has oil grooves and three lubrication holes, and this series of bearings is always lubricated by oil. 3. It is a non-sealed bearing, the outer ring has no ribs, and has oil grooves and three lubrication holes. The inner ring has three ribs. A fixed ring is installed in the middle of the outer ring between the two rows of rollers, which can prevent the rollers from falling out and keep the bearing as a whole. This series of bearings can allow a certain axial displacement between the shaft and the bearing seat to occur in the bearing. Because it can be used as a floating end bearing 4, the outer ring has a single rib, and there is a lock ring on the side without a rib, which can be used for one-way positioning of the crankshaft. The axial clearance 'S' in the bearing ensures that the crankshaft is compared with the bearing box. Axial positioning shift. 5. It is used in extremely heavy load and low speed places. It has a self-locking roller group. Even if the inner ring is removed, the rollers will not be scattered. Therefore, this type of bearing is easy to install and disassemble, and can bear one-way axial load for one-way operation. position. Basic layout of full complement cylindrical roller bearings 1. Basic layout of single row full complement cylindrical roller bearings Single row full complement cylindrical roller bearings can withstand very large radial loads, as well as axial loads in the direction of the drug, and the axial positioning A similar bearing guarantee with a symmetrical arrangement can be used. NCF 29V and NCF 30V series bearings have two fixed ribs on the inner ring and one rib on the outer ring, and they can only withstand axial loads in the direction of the fixed rib of the outer ring. NJ23VH series bearings can benefit from axial loads in the direction of the inner ring rib. Their rollers are fixed in the outer ring and will not come out even if the inner ring is removed. In this way, when the two ferrules are tightly combined, it is also easy to install and disassemble respectively. 2. The basic type of double-row full-complement cylindrical roller bearings In addition to being able to withstand very large radial loads and axial loads, double-row full-complement cylindrical roller bearings can also withstand overturning moments, so they are long used as fixed bearings. The outer ring of NNC 49V series bearings has a lubricating oil groove and geometric lubricating oil holes, which can also be lubricated in the shaft during operation. Both ends of NNF50B.2LS.V and NNF50C.2LS.V series bearings adopt contact seal, and the seal ring is filled with grease. In an environment with better application conditions, the grease can reach the working life of the bearing. Lubrication can be carried out through the lubricating oil groove and lubricating oil hole on the outer ring. If the same several bearings are installed on a shaft, the rotation speed of the outer ring can be different because the outer ring is narrower than the inner ring. This is a bit suitable for the pulley mechanism. In order to make the pulley easy to fix on the bearing outer ring, there are annular grooves on both ends of the bearing outer ring that can be installed with elastic retaining rings.
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