Depending on production environment conditions, ultrasonic converters are available with protection ratings of IP50, IP65, and IP67. For rotating operation, a series of ultrasonic converters with integrated HF connection for rotary couplers has been developed. What all ultrasonic converters have in common is their central assembly with solid piezoceramic four-disk technology. The rigid decoupling principle allows for axial and transverse forces. Special manufacturing processes ensure extremely long service life at constant output amplitude.