Measuring device and measuring methods for electric motors

Measuring device for electric motors (10), in particular for spindle motors having a motor receptacle (42), in which the electric motor to be tested (10), whose relatively respect to a stator (22) rotatable about a rotation axis (20) rotor (18) due to manufacturing inaccuracies is subject to a shock, is the stator can be positioned for the measurement, wherein the measuring means comprises at least a first impact sensor (70) having first runout measuring device (158) held with which on the rotor (18) of the motor mounting (42) the electric motor (10) from the variation of the distance values ​​between the first impact sensor (70) and the rotor (18) during one revolution resultant radial impact (RS) of the rotor (18) in a first direction (66) can be detected, and the measuring device comprising at least a second shock sensor (90) having second runout measuring device (168), with which on the rotor (18) from the variation of the para tandswerte arising between the impact sensor (90) and the rotor (18) during one revolution of the axial stroke (AS) of ...