With the development of SDF^® surface-layer hardening, we made a revolutionary advancement in the field of inductive-heating processes. Accurate, inductive contour hardening permits an enormous increase in productivity and economic efficiency in the production process.

With SDF^® generators, it is also possible for the first time to use two different frequencies (HF and MF) on an inductor at the same time. For this purpose, the  SDF^® generators include one HF and one MF converter each with a common power output, with a HF oscillation superimposed on the medium-frequency basic oscillation. The HF and MF power components can be continuously adjusted from 2 to 100%. With up to 8 programmable times with freely selectable power levels, even complex heating tasks involving workpiece zones with numerous contours can be solved using the integrated PLC. A pyrometer can additionally be connected for temperature regulation.

SDF^® (Simultaneous Dual Frequency):
Typical effective hardening depths (true-contour): approx. 0.2 mm – 5 mm
Frequencies: MF 8 kHz – 40 kHz, HF 80 kHz – 450 kHz
Power: 15 kW – 3000 kW

Microprocessor controlled
The SDF^® generators are controlled by the digital operator unit. It is equipped with a backlit, graphics-capable LCD screen and serves for input of operating modes, parameters, and to display setpoint and actual values. Furthermore, the individual values of the MF and HF power components are displayed in curve form, and the current water flow rates and the setting of limit values are shown.