The difference between the cylindrical roller bearings and needle roller bearing? Can be used in any occasion? - bearing knowledge

by:Waxing     2020-06-03
Belong to precision bearing cylindrical roller bearings cylindrical roller bearings, precision separation mailed roller shaft ring guard guide, guided by cage, roller and shaft washer, can be separated from the other bearing ring, the type of bearings is separable. This kind of bearing installation, disassembly is more convenient, especially when the inner and outer ring and the shaft, shell is interference fit more show its advantages. This kind of bearing with race for line contact bearings. Load capacity is big, mainly bear radial load. Only inner and outer ring with penal single bearing can follow the constant axial load of smaller or larger intermittent axial load; Compared with other tired socket in the shape of the same size, this kind of bearing with high load, at the end of the noise and the characteristics of high speed and roller and ring guard friction small, suitable for high speed spinning. Very applicable to all kinds of precision machinery and mining mill machinery. But to cooperate with such bearing shaft, roller and other related parts to precision machining. May according to the ring presence of guard, NU, NJ, NUP, N, NF, such as single row cylindrical roller bearings, double row cylindrical roller bearing and NNU, NN and other. The bearing inner ring and outer ring is separable structure. No guard of cylindrical roller bearing inner ring or outer ring, internal ring and outer ring can be to relative axial movement, so can be used as free end bearing. The one side of the inner ring and outer ring with double guard, on the other side of the ring has a single guard cylindrical roller bearing, can withstand a certain degree of axial load in one direction. General use of stamping steel cage, cage or copper alloy car system entities. But there are also part of the use of polyamide forming keep frame. Open stamping outer ring needle roller bearing ( Image for the company to film, rustling figure will investigate) Needle roller bearing needle roller bearing is a cylindrical roller of roller bearings, relative to its diameter, roller is thin and long. This is called needle roller. Although has a small cross-section, bearing still has high load capacity, needle roller bearing with thin and long ( Roller diameter D 5 mm or less, the L/D 2 or more. 5, L for roller length) , so the radial structure is compact, its inner diameter size and load capacity at the same time, with other types of bearing outside diameter to a minimum, especially suitable for the limited size of the radial installation supporting structure. So the needle roller bearing is mainly used in place with limited space, so in the automotive, motorcycle, textile machinery has been widely applied on. And inner ring is equipped with the needle, namely if the hardness of shaft, roughness in conformity with the requirements, such as can not inner ring ( Space is limited) The degree of processing, but if the shaft is lower, or more soft, you will need to match inner ring raceway. Cylindrical roller bearings and needle roller bearing difference is as follows: 1, cylindrical roller bearing, rolling body is a conical roller; Needle roller bearing is needle roller roller; 2 relative needle roller bearing, cylindrical roller bearing structure is larger; 3, roller besides can bear radial force also can withstand the axial force, and needle roller bearings can bear radial force; 4, single row cylindrical roller bearing points double row and column, applied to different environments and situations; 5, cylindrical roller bearing relative to the needle roller bearing working speed is higher; 6, cylindrical roller bearings are generally choose high quality bearing steel and special steel; And thin needle roller bearing is chosen steel plate stamping.   Is generally applied occasion in mechanical design, make sure of the size of the shaft, then choose rolling bearing according to the size of the shaft. However, when the diameter of the bearing in the machine direction is restricted, choose needle roller bearing, special light and ultra light series of ball or roller bearings; When the bearing in the axial position of the machine is restricted, can choose a narrow, narrow range of ball or roller bearings. Centripetal needle roller and cage assembly, stamping outer ring needle roller bearing, entity ferrule needle roller bearings, thrust needle roller bearing is widely used in automotive related information and engineering mechanical transmission system, steering system, the place such as motorcycle engine connecting rod, used the space is little, large carrying capacity. Needle bearing with fine and long roller ( For 3 ~ 10 times the diameter of the roller length, diameter, generally no more than 5 mm) , so the radial structure is compact, its inner diameter size and load capacity at the same time, with other types of bearing outside diameter to a minimum, especially suitable for the limited size of the radial installation supporting results.
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