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Combination Of Angular Contact Bearings
Sep 24, 2018

Back-to-back combination DB: it can withstand radial load and axial load in two directions. Due to the larger distance of the action point, the stiffness is very high when the moment load is applied. However, when the bearing seat accuracy is poor, there are installation errors (misalignment) and so on, because the torque stiffness is higher, its internal load increases, easy to produce early peeling damage.

Face to face combination DF: the distance between action points is small, so the ability to withstand torque load is poor. However, the internal load caused by installation tilt can be suppressed. Therefore, bearing seat accuracy is poor, shaft stiffness is small, load caused by the bending of the shaft, such as large, more use of such combinations.

Parallel combination DT: Although it can only bear radial load and axial load in one direction, but its axial stiffness value is twice that of single row, so it is suitable for the case of large load in one direction.

The 3 column combination DBD: can withstand radial load and axial load in 2 directions. However, the preload distribution of bearings is uneven, single-row bearings bear internal load is two times that of two-row side bearings. When rotating at high speed, the internal load of single row side bearing increases, which may cause bearing damage, so DBD combination is not suitable for high speed rotation.

4 column combination DBB: it can bear radial load and 2 axial load. Under the same internal clearance, the preload and stiffness are about twice as much as those of DB combination, and the ultimate axial load is also larger.