[Product Application] Master These 10 Standards, And Choose The Bearings Suitable for The Equipment Every Minute

In everyday applications, there are a variety of bearing types to choose from, from which designers can choose the bearings that best suit their needs, however, due to the diversity of applications and the different effects on bearing position, it is not possible to give the general applicable rules for bearing type selection here, when deciding on a specific bearing type, it is usually necessary to weigh 10 criteria.

Bearing type design comparison

In many applications, the main size of the rolling bearing is usually determined by the overall design of the machine or equipment. For small diameter shafts, the most suitable bearings are ball bearings, especially deep groove ball bearings and needle roller bearings, in the case of large diameters, available bearings are cylindrical roller bearings, tapered roller bearings, self-aligning roller bearings and annular roller bearings, as well as deep groove ball bearings and needle roller bearings.

If the bearing load is limited in the radial direction, such as in the high-performance gear box of the vehicle, it can be preferred to use bearings with smaller cross section heights, such as needle roller and cage components, stamped outer ring needle roller bearings, etc., because of the lower cross section height of the line contact, these bearings have a higher radial load capacity.

Bearing with small section height, radial section height comparison

① Needle roller and cage assembly; ② Open stamping outer ring needle roller bearing; 3 Needle roller bearing without inner ring; ④ Needle roller bearing with inner ring

Small axial space, bearing combined load bearings If the bearing design is small in the axial direction, it is suitable to use some series of cylindrical roller bearings, such as NJ series semi-positioning bearings and deep groove ball bearings or combined needle roller bearings

Used with deep groove ball bearings, can support the axial force in one direction of the semi-positioning bearings 

① cylindrical roller bearing NJ series (semi-positioning bearings); ② Deep groove ball bearing (positioning bearing)

Combination needle roller bearings for supporting high radial and axial forces in one or both directions

① Needle roller/axial deep groove ball bearing, without inner ring, without end cover for unidirectional axial force; ② Needle roller/angular contact ball bearing with inner ring for axial force in both directions

Bearings with pure axial bearing capacity If bearings bear only axial loads, the suitable bearings are axial needle roller and axial cylindrical roller and cage assembly, axial needle roller and radial cylindrical roller bearings, and axial deep groove ball bearings with small axial cross section heights.

Axial bearings - comparison of cross sections

① Axial needle roller and cage assembly; ② Axial needle roller bearing; ③ axial deep groove ball bearings; ④ Axial cylindrical roller bearings