Angular contact bearing arrangement -Back to Back, Face to Face and Tandem

In the production, in order to ensure that the bearing can be matched to the maximum extent when the outer ring of the factory is randomly matched, in order to reduce the final grinding allowance, we strictly control the width difference between the inner and outer rings of the same bearing in the design and processing process within a range. , Paired angular contact ball bearing refers to the accuracy of P5, used in non-high-speed precision machinery (high-speed spindle) general industrial motor, gear box, pump and other transmission parts

Universal matching bearing, universal matching bearing can be arbitrarily composed when used together
Face, back to back, side by side three configurations, generally paired bearings for two sets of pairing, can also be used with multiple sets
Paired angular contact bearings are used to withstand both radial and axial loads, as well as pure radial loads and axial loads in either direction. When the bearing is mounted on the machine, the clearance in the bearing is eliminated, and the medical history ferrule and the steel ball are in a pre-tightened state to improve the rigidity of the assembled bearing.
Paired bearings are generally combined: back-to-back DB, face-to-face DF, tandem DT.
Back-to-back DB: Can withstand axial loads acting in both directions, but the load in each direction can only be withstood by one bearing. Back-to-back mounted bearings provide a relatively rigid bearing configuration and can withstand overturning moments.
Face-to-face DF: It can withstand axial loads in both directions, and the load in each direction can only be withstood by one bearing. This configuration is not as rigid as back-to-back pairing and is less subject to overturning moments.

Series DT: The radial and axial loads are evenly shared by the bearings, and the bearings can only withstand axial loads in one direction. Usually, in order to balance and limit the axial displacement of the shaft, the other bearing needs to be fitted with a bearing that can withstand the bearing load in the other direction.

Back-to-Back Mounting - DB (Contact angles diverging towards shaft centerline) Before installing, there is clearance in between the 2 surrounding inner ring deals with. After installing, these faces are secured together to offer an internal preload on each bearing. This plan is appropriate for pulley-blocks, sheaves and other applications where there are reversing loads and likewise all fl oating positions where thermal growth of the shaft happens. It likewise supplies axial and radial rigidness and equivalent axial capability in either instructions when utilized in a fi xed place. Back-to-back is the most frequently utilized of all duplex arrangements.

Face-to-Face Mounting - DF (Contact angles assembling towards shaft centerline) Before installing, there is clearance in between the 2 surrounding external ring deals with. After installing, these faces are secured together in between the real estate shoulder and cover plate shoulder, supplying an internal preload on each bearing. This plan offers equivalent axial capability in either instructions along with radial and axial rigidness. Given that the in person installing has intrinsic downsides of low resistance to minute loading and thermal instability, it ought to not be thought about unless a signifi cantly easier approach of assembly or disassembly takes place from its usage.

Tandem Mounting - DT Before installing, the inner ring faces of each bearing are balanced out from the external ring deals with. After installing, when an axial load is used equivalent to that of two times the typical preload, the inner and external ring faces are brought into positioning on both sides. This plan supplies double axial capability in one instructions just. More than 2 bearings can be utilized in tandem if extra axial capability is needed.

Advantage of Each Method 

DB – Provides excellent radial, axial and moment stability when there are no additional bearings on the shaft.

DF – Provides radial and axial stability and aligns readily with additional bearings mounted on the same shaft. 

DT – Shares extra-high thrust loads equally between two bearings. Does not provide stability unless further preloaded with additional bearings.

Bearings of DB, DF, and DT duplex sets have two axial lines forming a 30° included angle “V” etched across the outer rings of the pair (with the point of the “V” at the outer ring face to which the load is applied in the case of DT pairs).