a contactlessly , inductively , or magnetically drivable agitator for fluids , in particular for agitating sterile fluids which is equipped with a separating vessel and an agitator head , which is supported thereon in an axially and radially movable fashion and is for supporting agitating elements . the novel agitator includes structures for hydrodynamically generating a fluid film from the medium to be agitated and during operation , the fluid film is formed between at least one stationary part of the separating vessel or a container bottom and at least one part of the rotationally movable agitator head that is equipped with the hydrodynamically acting structures . during operation , the fluid film eliminates essentially all of the pressure on the bearing , drastically reduces the wear , and as a result , practically no further abraded material gets into the fluids to be agitated . such agitators permit maximum speeds of up to 3000 rpm . the agitators are suitable for installation in conventional metal receptacles , but it is preferable to use plastic nonreusable agitators in nonreusable containers .