Abstract: The invention relates to a workhead for mechanical working of materials. This invention is directed to metal working machines and is adaptable for use in the mechanical working of metals and plastics, involving the use of liquid lubricants and/or coolants. The technical result achieved by implementing the invention comprises an improvement in the efficiency of the cavitation treatment of a liquid lubricant and/or coolant, which secures the dispersion of a solid lubrication in aqueous solutions, an increase in the stability of water-in-oil emulsions, decomposition of a liquid lubricant and/or coolant and a decrease of viscosity, an improvement in corrosion resistance, reduction in a tool wear and, simultaneously, an improvement in the quality of a working surface. The apparatus comprises a housing (1), inside which is fitted a main oscillator (2), to which is connected a tool (4) through the intermediary of an extension piece (3).