The induction-heating technique saves technicians time and money during the crucial-but-challenging task of loosening frozen fasteners. Here's how it works.
An induction heater is an electrical device that applies highly concentrated heat onto a stuck or rusted fastener. The proper amount of heat expands a frozen nut, breaking the corrosive bond between it and a bolt or stud.
Experience shows that induction heating loosens frozen fasteners more neatly and efficiently than a traditional oxyacetylene torch does. And unlike a common torch, this technique doesn't burn any materials near the frozen fastener.
The most-popular tool of this type is the Mini-Ductor from Induction Innovations.
Sources who have used this induction heater extensively sing its praises, calling it an essential tool. Although many service personnel already are aware of it, others I encounter are not.
This tool features interchangeable heating elements called "work coils" that apply heat directly to the frozen fastener. Changing from one shape or size work coil to another only takes a moment; it requires no tools.
The selection of work coils within the Mini-Ductor tool kit enables a tech to apply heat efficiently to a wide range of fasteners, fittings and bearings.
I have used these work coils on strut and shock-absorber hardware, exhaust nuts, brake-line fittings, oxygen sensors and wheel nuts.
The induction-heating technique eliminates the potential fire hazard of the cutting torch's open flame.