Description: In solid mechanics, in the field of rotordynamics, the critical speed is the theoretical angular velocity that excites the natural frequency of a rotating object, such as a shaft, propeller, leadscrew, or gear. ; Name: crit. speed
Description: Speed of rotation at which the frequency of vibration (or its multiples) corresponds to the rotor resonant (lateral or torsional) ; Name: Critical speed
Description: maximum value of ratio between the applied shear stress and rate of shear of a liquid at design temperature it is sometimes referred to as the coefficient of dynamic viscosity, or simply viscosity, thus dynamic viscosity is a measure of the resistance to flow or deformation of a liquid; Name: maximum dynamic viscosity at design temperature