Both ball bearings and bearing rollers belong to bearing rollers. In short, the rolling element is a ball, that is, a steel ball. The other rolling element is a steel column. The utility model relates to a bearing roller. The ball is installed between the inner steel ring and the outer steel ring, and can bear a large load. Also called ball bearing.
Ball bearing mainly includes four basic elements: ball, inner ring, outer ring and cage, as shown in the figure. General industrial ball bearings meet the standard. The balls and rings are usually made of high chromium steel with a Rockwell C hardness of approximately 61-65. The hardness of cage is lower than that of steel ball and ferrule, and its material is metal or nonmetal. The rotating friction resistance of bearing roller is smaller than that of journal bearing, so the temperature generated by friction will be lower at the same speed.
The rolling element is the radial bearing roller of the bearing roller. The bearing rollers and raceways are line contact bearings. Bearing capacity, mainly bearing radial load. The friction between the rolling element and the retaining ring is small, which is suitable for high-speed rotation. There are NU, NJ, NUP, N, NF and other single row bearings and NNU, NN double row bearings according to whether the ring has rib. Bearing is a structure in which the inner ring and outer ring can be separated. Cylindrical bearing roller without rib on inner or outer ring, the inner and outer rings can move axially, so it can be used as free end bearing. Cylindrical bearing rollers with double ribs on one side of the inner and outer rings and single ribs on the other side of the outer rings can withstand axial load in one direction to a certain extent. Generally, steel pressing cage or copper alloy turning cage are used. However, some polyamide shaped cages are also used.
What is the difference between cylindrical roller bearing and needle roller bearing? Where can it be used? Today, I will introduce the difference between cylindrical roller bearing and needle roller bearing in detail? What are the characteristics? Where can it be used? Cylindrical bearing rollers are precision bearings. The rib guide rail of precision sorting roller collar is composed of cage, roller and guide collar. It can be separated from another bearing ring and belongs to separable bearing. This kind of bearing is easy to install and disassemble, especially when the inner and outer rings are required to have an interference fit with the shaft and housing, which shows its advantages.
The bearing and raceway are line contact bearings. Bearing capacity, mainly bearing radial load. Only single row bearings with rib on inner and outer rings can bear small constant axial load or large intermittent axial load; Compared with other bearings with the same overall dimensions, this type of bearing has the characteristics of high load and low noise. With the characteristics of high speed and high speed, the friction between the rolling element and the ring rib is small, and it is suitable for high-speed rotation. It is very suitable for all kinds of precision machinery and mining machinery. However, shafts, rolling elements and other related parts that fit with such bearings require precision machining.
It can be divided into single row cylindrical bearing rollers such as NU, NJ, NUP, N, NF and double row cylindrical bearing rollers such as NNU, NN according to whether the ring has rib or not. The bearing is a structure in which the inner ring and outer ring can be combined.
