The magnetic field and the levitation force produced by a rotor with alternating magnetic poles in a magnetic fluid hydrostatic bearing is numerically evaluated. For the magnetic field computation has used a 3D-FEM program, MagNet 5.0 and for the numerical evaluation of the levitation force the MatLab program has been used.

Keywords: Magnetic liquid, Magnetic field, 3D-FEM, Levitation, Force, Bearing.