Car wheel hub bearings come in two types: ball bearings and roller bearings. The specific selection depends entirely on the vehicle's load requirements and bearing generation design, and there is no single unified standard.
🚗 The mainstream use of ball bearings in ordinary passenger cars
The wheel hub bearings of most household sedans and small SUVs adopt double row angular contact ball bearings (ball structure), with two rows of steel balls as rolling elements inside.
. This structure can simultaneously withstand bidirectional axial loads and moderate radial loads, with a high speed limit and low friction resistance, suitable for conventional driving conditions on urban roads, and is currently the mainstream design solution for third-generation integrated wheel hub units.🚛 The mainstream wheel hub bearings for heavy-duty vehicles include double row tapered roller bearings (roller structure) with linear contact tapered rollers for engineering vehicles, large pickup trucks, heavy-duty SUVs, and commercial vehicles.
Its radial and axial load-bearing capacity is much higher than that of ball bearings of the same size, which can cope with large load impacts and are suitable for extreme working conditions such as long-term heavy load and off-road. Almost all heavy-duty truck models use this type of roller structure wheel hub bearing.
.📌 Additional explanation: In the early days of traditional car models, many wheel hub bearings were installed in pairs with two sets of single row tapered roller bearings (rollers), which required manual adjustment of clearance during assembly; Nowadays, the mainstream third-generation wheel hub units for passenger cars almost uniformly adopt a double row ball structure with pre adjusted clearance, greatly reducing assembly difficulty and maintenance costs.
source:http://en.xcwlbearing.com/news1097119.html