For a Vertical Hollow Shaft (VHS) motor, the bearing system is one of the key factors that determines reliability, stability, and service life.

VHS motors are widely used for vertical turbine pumps, deep well pumps, and other vertical pumping applications. In these systems, the motor must handle not only radial load, but also the axial thrust generated by the pump.

That is why a reliable VHS motor needs the right bearing arrangement.

In a typical VHS motor, the upper bearing is designed to carry the main axial thrust, while the lower bearing mainly works as a guide bearing to support stable rotor operation.

Common VHS motor bearing solutions include:

Angular contact ball bearings
A common choice for VHS motors. They are suitable for combined radial and axial loads and can be arranged as single, double, or tandem bearings depending on the pump thrust requirement.

Deep groove ball bearings
Often used as lower guide bearings. They help maintain rotor stability and smooth operation.

Spherical roller thrust bearings
Used when the application requires higher axial thrust capacity.

A well-designed VHS motor bearing system helps achieve:

Lower vibration
Stable operation
Longer bearing life
Reduced maintenance
Better pump and motor reliability

At our company, we select the proper bearing solution according to pump thrust, speed, duty condition, installation requirements, and customer application needs.

A VHS motor may look simple from the outside, but the bearing design inside makes a big difference.

For your vertical pump applications, choose a VHS motor designed for reliable thrust performance and long-term operation.