Stiefel Induction Heaters: Energy-Efficient Solutions Since 2013

Low frequency induction heaters, typically operating at mains frequency (50/60 Hz) or up to 1 kHz, are characterized by their deep and penetrating heating effect. The lower the frequency, the deeper the electromagnetic field penetrates into the material, making this technology ideal for through-heating large, massive sections of metal to a uniform temperature. Primary applications include the bulk heating of billets, slabs, and large bars for forging, rolling, or extrusion processes. In these scenarios, the entire cross-section of the metal must be heated homogeneously to a plastic state to allow for deformation without cracking. Low frequency induction is also the preferred method for heating large diameters for shrink-fitting operations, such as mounting railway wheels onto axles or fitting large bearings onto shafts. The process is highly efficient for these heavy-duty applications, offering rapid heating rates and excellent temperature uniformity. Stiefel Combustion's low frequency induction systems are engineered for high power and extreme durability to withstand the harsh conditions of primary metal processing industries. They are designed to deliver consistent performance around the clock, maximizing uptime and productivity. Our engineers can design custom induction coils tailored to the specific geometry of your workpieces. For more information on our powerful and reliable low frequency induction heating solutions for large-scale industrial applications, we encourage you to get in touch with us directly.