tapered roller bearings and needle bearings
Cylindrical Roller Bearings are precision bearings. The rim guide of the precision sorted roller post ring is composed of a cage, a roller and a guide collar. It can be separated from the other bearing ring and is a separable bearing. Such bearings are more convenient to install and disassemble, especially when the inner and outer rings are required to have an interference fit with the shaft and the housing. Such bearings are generally only used for live ammunition with radial load guns, only internal and external. Single-row bearings with ribs on the rim can be used with smaller constant axial loads or larger intermittent axial loads; compared to other sizings of the same dimensions, such bearings have high loads, bottom noise and high rotational speed. Features are ideal for use with a variety of precision machinery and mining mill machinery. However, the shafts, rolling elements and other related parts that are matched with such bearings need to be precision machined.
Needle roller bearings (NK, NKS, RNA49, RNA48, NKL, NKLS, NA49, NA48, RNA69, NA69, RNA49...RS, RNA49..2RS, NA49..RS, NA49..2RS, RNAO, NAO) are compact, The radial size is small, the load capacity is large, and it is subjected to a large radial load. This type of bearing has a variety of structure and size series. The assembled G2 needle roller has a variation of the batch diameter within 2um. Except for the full complement needle roller bearing, the high-performance cage is used to correctly guide the needle parallel axis. . Different structures, different types, different direction of bearing force, different speeds, different loads, different materials, different application occasions, etc.
The fundamental difference: the rolling element of the tapered roller bearing is a tapered roller; the rolling element of the needle bearing is a needle roller;
The above fundamental difference determines that the structure of the tapered roller bearing is larger than that of the needle bearing. The tapered roller can withstand the axial force in addition to the radial force, and the needle roller bearing can only bear the radial force;
Tapered roller bearings are divided into single columns and multiple columns, which are applied to different environments and occasions respectively;
The tapered roller bearing has a higher working speed than the needle bearing;
Tapered roller bearings are generally made of high quality bearing steel and special steel; thin-walled needle bearings are stamped from steel plates;
In short, these two types of bearings are not the same type of bearings, there are too many differences, it is somewhat far-fetched compared to the other; needle bearings are composed of thin and long needles and cages. Cylindrical Roller Bearings. It is composed of a cylinder and a roller. The column is thicker than the needle roller, also called the coarse needle roller.