Rolling bearings are imported bearings working under the rolling friction. The rolling bearing is easy to use and maintenance, reliable in operation, good in starting performance, and high bearing capacity at medium speed. Compared with the sliding bearing, the rolling bearings radial size is larger, the vibration reduction ability is poor, the working life is short when fast running, the sound is big. Radial bearing in rolling bearings (mainly bearing radial force) is usually composed of 4 parts, which are inner ring, outer ring, rolling objects and rolling objects cage. The inner ring is tightly sheathed on the shaft neck and rotates with the shaft, and the outer ring is arranged in the bearing housing hole. In the inner and outer peripheral inner raceway are made. When the inner and outer rings are relatively rotated, the rolling object is rolling on the inner and outer rings, which are separated from the holding frame to avoid mutual friction. The thrust bearing ring has two parts which are tight ring and loose ring. The tight ring puts on the bearing tightly, while loose ring puts on the bearing housing. Rings and rolling objects usually made of high strength, good abrasion resistance of rolling bearing steel, surface hardness after quenching should reach HRC60 ~ 65. The cage is often punch made of mild steel, and also copper alloy textolite, or plastic.
This kind of bearings are often used for mine conveying machinery. Mining supplies must have coal safety certificate, and nylon cage bearing conforms to the standards of national coal safety certificate. Effectively prevent the static electricity caused by rolling bearing. Solid nylon cage is characterized by a favourable combination of strength and elasticity. Nylon has good sliding performance on the surface of the steel with lubrication. At the same time surface of cage contacted with rolling objects is smooth, have little friction, so the heat and wear in bearing are very low. Low density material means that the inertia of the cage is very small. Running properties of nylon cages in the absence of lubricant are excellent, and available of continuing operation for a period of time, without stuck and further damage.
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