What are the differences between needle roller bearings and cylindrical roller bearings?
Release time:
2025-02-23
For different selection requirements, the differences between needle roller bearings and cylindrical roller bearings are described.
Needle roller bearings are roller bearings with cylindrical rollers which are both thin and long relative to their diameter. Despite the small cross-section, the bearings have a high load carrying capacity. Needle roller bearings are fitted with thin and long rollers and therefore have a compact radial structure, with the same inner diameter dimensions and load carrying capacity as other types of bearings, with the smallest outer diameter, and are particularly suitable for support structures where the radial mounting dimensions are restricted.
Cylindrical roller bearings are centripetal rolling bearings with cylindrical rollers. The internal structure of cylindrical roller bearings adopts parallel arrangement of rollers, with spacer keeper or isolation block between rollers, which can prevent tilting of rollers or mutual friction between rollers, and effectively prevent the increase of rotating torque.
The difference between needle roller bearings and cylindrical roller bearings:
The rolling body is different, needle roller bearings rolling body is more thin and longer;
The space structure of needle roller bearings is relatively small;
Needle roller bearings can only withstand radial force; but cylindrical roller can also withstand a certain amount of axial force;
Cylindrical roller bearings are available in single row, double row and multi-row, which can be applied in more environments;
Needle roller bearings can only be used at low operating speeds;
Thin-walled needle roller bearings are made of stamped steel plates.
Bearing selection usually involves determining the size of the shaft before determining the type of rolling bearing. If there is a limitation on bearings in the diameter direction of the machine, then types such as needle roller bearings, light series ball or roller bearings are considered; if there is a limitation on bearings in the axial position of the machine, then types such as narrower series ball or roller bearings may be considered.
In the automobile and construction machinery speed transmission, steering, engine connecting rod and other small space, load capacity needs big system, such as: centripetal needle roller and cage assembly, stamping outer ring needle roller bearings, thrust needle roller bearings and other needle roller bearings have a wide range of applications.
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