Monday, March 14, 2011

Cylindrical Roller Bearings

All bearing products are popular among different industries. They have various characteristics and functions. Compared to ball bearings, roller bearings have higher radial load capacity. It is a very important category among all the different kinds of bearing products.
Roller bearings can be future divided into many types. When compared to the same-sized sleeve bearings, they are capable of higher rotational speeds. Among all different kinds, the cylindrical roller bearing is quite important. They can normally take the radial load, on the other hand, single row cylindrical roller bearing with ribbed inner ring and ribbed outer ring can take smaller axial load or intermittent axial load.
This kind of bearing has a larger carrying capacity of axial load compare with the deep-groove ball bearings. The structure of the bearing shows that it runs very well under high rotational speed. It is a separable bearing. It is especially convenient for the assembly and disassembly. It has advantages in a condition that the interference is required and assorted with inner ring, outer ring and housing.
Cylindrical roller bearings mostly consist of three main sections: The inner bearing race fits snugly on the turning shaft, or can actually be the shaft itself if the shaft metal is hard enough. The outer race is a uniform and hardened collar that fits inside the bearing holder bore. Finally, there should be a sufficient number of uniform straight rollers to completely fill the space between the two races without binding together. These bearings will last almost forever if sealed, kept very clean, and lubricated with high film strength-bearing grease.
This type of bearing product has various applications. They are suitable for electric motors, automobiles, transmission shafts, gear shafts and so on. On vehicles, they are ideal axle bearings for dump trucks, cement mixers, bulldozers, load haulers, and lifts. Besides, they can also be applied in very large industrial machines such as presses, forges, conveyors, gear boxes and rolling mills, etc. Double row cylindrical roller bearings are good at the spindles of machine tools.
In addition to this, this kind also has various series for customers to choose. There are cylindrical roller bearings without outer ring capped edge such as the NU and N series, those with capped edge on both outer ring and inner such as the NJ and NF series, those with full complement (rollers) such as the NJ.V, NUP.V, RNU.V, etc.

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