Self-Supported Coils (sometimes called Air Core Coils) are ideally suited where dimensional constraints preclude the use of a bobbin or other coil form.  Complex shapes can be formed by employing the winding arbor and/or post heating in a forming tool.

Self Supported Coils are achieved by using wire with a bondable coating activated by solvents, resistance heating, or post baking. These processes secure the magnet wire strand to strand.

Magnet wire is available with underlying insulation up to 180°C.  The bonding materials do soften at temperatures of 125°C to 150°C.

In applications where impregnation or varnish processes are not desirable, coil bonding using bondable wire is employed to prevent movement or abrasion of wire (strand to strand).