Full-roller bearings without outer ring are mainly used in the inner holes of the planetary gear and sun gear of the industrial planetary gear retarder and other places where the performance and reliability are high, and the installation space is extremely small. The strict conditions for enlisting in the army require that the bearing be installed with as many cylindrical rollers as possible, and at the same time, the compactness of the design must be guaranteed, so as to ensure the maximum radial bearing capacity and high rigidity requirements of the bearing. Double row full complement cylindrical roller bearings without outer ring have more rollers, but the layout of this double row bearing is also very unstable, which is not convenient for installation and transportation. The outer ring cylindrical roller bearing is difficult to use and cannot meet the requirements of the working conditions. However, when using an ordinary cage, during high-speed rolling, it is easy to appear deviation in the cage, resulting in the blocking of the cylindrical roller and the cage. In normal use, the use effect of the bearing is reduced, and the overall stability of the double-row structure is longer. The ordinary cage is prone to the phenomenon of swinging, which is not enough to carry a large number of rollers, which affects the bearing capacity of the bearing. Stamped steel cage. The stamped steel cage of full roller bearing without outer ring is made of low carbon steel and undergoes a series of cutting, forming and perforating processes. This cage has a variety of designs and is suitable for general-purpose spaces without outer ring full complement roller bearings. The S-type cage for 5200 series cylindrical roller bearings is a special design, which is mounted on and guided by the outer ring rib. The beams of this cage are concave, they evenly cut off the rolling elements and keep them on the outer ring. Stamped steel cages can be easily mass-produced and can be used at high temperatures where adequate lubrication is not possible. Machined cage. Machined cages are an option for small cylindrical bearings, often made of brass. The machined cage design of cylindrical roller bearings can provide double good performance in severe service. Cages are available in one-piece or two-piece plans. One-piece designs can be finger cages or standard cages with fully ground pockets. The one-piece finger plan and the two-piece window cage are seen more in the specification for full complement roller bearings without outer ring. They are both roller-guided programs. The one-piece pocket scheme is a premium quality cage for EMA series bearings. Different from the traditional cylindrical roller guide cage, it is an outer ring guide cage, which can greatly reduce the drag on the rolling elements, thereby reducing the heat generation and extending the service life of the bearing. This one-piece cage also reduces heat and wear by increasing the mobility of the lubricant compared to two-piece designs. Pin cage. The pin cage of the cylindrical roller bearing consists of two metal rings and a set of pins passing through the middle of the rolling elements. This cage is used for large diameter cylindrical roller bearings where machined brass cages cannot be used. When this scheme is used, the number of cylindrical rollers can usually be increased to improve the bearing capacity.
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