Types of Bolted Roller Bearings and Two Types of Commonly Used Cylindrical Roller Bearings

Full complement cylindrical roller bearings are designed to accept heavy loads. Under the same width, compared with the traditional bearing with cage, this kind of bearing has a very high bearing capacity, a small radial section, which can save space, but the speed is relatively low. In order to make the bearing work normally, under the condition of continuous operation, the bearing must accept a certain minimum load, namely C/P<25. Otherwise, wear will be aggravated due to lack of smoothness and high-speed operation. All multi-row cylindrical roller bearings have a smooth groove and a smooth hole on the outer ring. Cylindrical rollers and raceways are linear contact bearings. The load capacity is large, and the radial load is mainly accepted. The friction between the rolling element and the rib of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs or not, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. The bearing is a structure in which the inner ring and the outer ring can be separated. Cylindrical roller bearings without ribs on the inner or outer ring, the inner and outer rings can move relative to the axial direction, so they can be used as free end bearings. Cylindrical roller bearings with double rib on one side of the inner ring and outer ring and a single rib on the other side of the ring can accept a certain level of axial load in one direction. Generally, a steel stamping cage is used, or a copper alloy car-made solid cage. But there is also a part of the use of polyamide forming cage. Type: Cylindrical roller bearings are separable bearings, which are very convenient to install and disassemble. Cylindrical roller bearings can accept large radial loads and are suitable for use in high-speed operation. This type of bearing allows the angular error (inclination) between the axis of the inner ring and the axis of the outer ring to be very small, as long as 2' to 4'. Therefore, the machining accuracy of the shaft and the bearing seat is relatively high. Otherwise, uneven load or stress concentration is likely to occur at the contact part of the raceway. However, the occurrence of stress concentration can be reduced after correcting the contact busbar of the rollers or raceways. Cylindrical roller bearings can be divided into different structures such as single-row, double-row and multi-row cylindrical roller bearings according to the number of rows of rolling elements installed. Bearings of different constructions are also reflected in the design of the position of the ribs. Among them, the commonly used cylindrical roller bearings are as follows: Single-row cylindrical roller bearings: Single-row cylindrical roller bearings are separable bearings, which are easy to install and disassemble. Both rings can be tightly fitted, and the modified rollers and rollers Contact lines between tracks can reduce stress concentrations. Double row cylindrical roller bearing: Double row cylindrical roller bearing belongs to the floating bearing, and its separability makes the installation and disassembly very convenient. Both ferrules are capable of a tight fit. Double row cylindrical roller bearings simply do not allow inclination angles.

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