Abstract: This invention describes an improved type of hydromatic brake in which the stators and rotors are prepared as individual items and the assembly is designed so that one, two, three or more sets of individual stators and rotors can be assembled inside a housing. The housing comprises a pair of end walls. Each stator has an outwardly extending planar annular flange which is clamped between the two end walls at their outer rim to provide a closed housing. When more than one stator is used an additional tubular flanged spacing element is provided, and two stators are clamped, one on each end of the annular tubular spacing element and the end walls are clamped to the stators. A second important feature of this invention lies in the design of the stator which carries an overhanging lip or peripheral rim into which the rotor fits. There is a selected radial clearance between the outer circumference of the rotor and the inner radius of the lip.