How to choose axial cylindrical roller bearing and needle bearings for different occasions?

axial cylindrical roller bearing 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 axial cylindrical roller bearing 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 speeds. 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 axial cylindrical roller bearing need to be precision machined.

A needle bearing is a roller bearing with a cylindrical roller that is thin and long relative to its diameter. This type of roller is called a needle roller. Despite the small cross-section, the bearing still has a high load bearing capacity, and the needle bearing is equipped with a thin and long roller (roller diameter D ≤ 5 mm, L / D ≥ 2.5, L is the roller length), so The radial structure is compact, its inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, and it is especially suitable for support structures with limited radial mounting dimensions.

The difference between axial cylindrical roller bearing and needle bearings is as follows:
1. The rolling element of the axial cylindrical roller bearing is a tapered roller; the rolling element of the needle bearing is a needle roller;
2, the structure of the axial cylindrical roller bearing is larger than the needle bearing
3. Cylindrical rollers can withstand axial forces in addition to radial forces, while needle roller bearings can only withstand radial forces;
4. axial cylindrical roller bearing are divided into single columns and multiple columns, which are applied to different environments and occasions respectively;
5. The working speed of the axial cylindrical roller bearing is higher than that of the needle bearing;
6, axial cylindrical roller bearing are generally selected high-quality bearing steel and special steel; and thin-walled needle roller bearings are selected from steel stamping.

In mechanical design, the size of the shaft is generally determined first, and then the axial cylindrical roller bearing is selected according to the size of the shaft. However, when the bearing is limited in the diameter direction of the machine, needle roller bearings, ultra-light and ultra-light series balls or roller bearings are used; when the axial cylindrical roller bearing is limited in the axial position of the machine, narrow or special can be used. Narrow series of ball or axial cylindrical roller bearing. Radial needle roller and cage assembly, drawn cup needle roller bearings, solid ferrule needle roller bearings, thrust needle roller bearings are widely used in automotive related information and engineering machinery shifting transmission systems, steering systems, motorcycle engine connecting rods, etc. It is suitable for occasions with small space and large carrying capacity. Tools are common. Needle roller bearings are equipped with thin and long rollers (the length of the roller is 3 to 10 times the diameter and the diameter is generally not more than 5 mm), so the radial structure is compact, and the inner diameter and load capacity are the same as those of other types of bearings. The smallest diameter, especially suitable for support results with limited radial mounting dimensions.