The difference between the cylindrical roller bearings and needle roller bearing? Can be used in what place?

Cylindrical roller bearings cylindrical roller bearings belong to fine bearing, fine separation mailed roller shaft ring guard guidance, is composed of rack, roller and guide shaft ring, but with another bearing ring separation, belong to the type of bearings do not. This bearing assembly, disassembly match bento, especially when the request of inner and outer ring and shaft, shell is interference fit more show its advantages. This kind of bearing with race for line contact bearings. Load can be big, mainly take radial load. As long as the single bearing inner and outer ring are carry penal 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. Apply to all kinds of fine machinery and mining mill machinery. But to cooperate with such bearing shaft, roller and other related parts demand for fine processing and into. Based on ring presence of rim, can have the NU, NJ, NUP, N, NF, such as single row cylindrical roller bearings, double row cylindrical roller bearing and NNU, NN and other. The bearing is the structure of the inner ring and outer ring do not. No guard of cylindrical roller bearing inner ring or outer ring, internal ring and outer ring axial relative to move, so can be used as a 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 of cylindrical roller bearings, able to accept a certain level of axial load in one direction. Use steel sheet stamping frame, or copper alloy frame system entity adhere to. But there are also a partial use of polyamide forming adhere to. 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, still has high load bearing can accept, 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) And radial structure is compact, its inner diameter size and load ability at the same time, with other types of bearing outside diameter to a minimum, particularly applicable to the limited size of the radial gear bearing structure. So the needle roller bearing is mainly used in places with limited space, so in the automotive, motorcycle, textile machinery applied widely. And inner ring is equipped with the needle, namely if the hardness of shaft, roughness and fit the request, can not inner ring ( Space was limited) , but if the level of processing of shaft compared low, soft, or compare it needs another with 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, the structure of the roller bearing is relatively larger needle bearing; 3, cylindrical roller, in addition to accept axial force and radial force outside also can accept the needle needle bearing can only accept radial force; 4, single row cylindrical roller bearing points double row and column, applied to different environments and places; 5 of needle roller bearing, cylindrical roller bearing associated with working speed is higher; 6, cylindrical roller bearing is ordinary are with high quality of bearing steel and special steel; And thin needle roller bearing is chosen steel plate stamping.   Application places in mechanical design, the size of the ordinary must first axis, and then, according to the size of the shaft to choose rolling bearing. However, when the diameter of the bearing in the machine direction was limited, choose needle roller bearing, light and ultra light series of ball or roller bearings; When the bearing in the axial position of the machine was restricted, can choose a narrow, narrow range of ball or roller bearings. Centripetal needle and insist on the frame components, stamping outer ring needle roller bearing, entity ferrule needle roller bearings, thrust needle roller bearing is generally used in automotive related information and engineering mechanical transmission system, steering system, motorcycle the place such as connecting rod, a machine for the space is little, can carry large place. Needle bearing with fine and long roller ( For 3 ~ 10 times the diameter of the roller length, average diameter is not more than 5 mm) And radial structure is compact, its inner diameter size and load ability at the same time, with other types of bearing outside diameter to a minimum, particularly applicable to the limited size of the radial gear bearing results.