Induction Hardening

Where it earns its place

Anything that has to resist wear on one face while absorbing shock through its body. Bearing journals on shafts, individual gear teeth, cam lobes, splines, track rollers, pins and rolls. A through-hardened shaft is hard everywhere and brittle everywhere; an induction hardened one has a hard running surface and a core that will bend before it snaps.

It stands or falls on the coil

The coil is what shapes the heat, so it has to match the part profile. This is why our inductors are designed and fabricated in-house rather than bought in, including flux concentrators for geometries an off-the-shelf coil cannot follow. Matching the coil to the work is what lets us hold case depth to tolerance on shapes that would otherwise heat unevenly.

How we build the coils →

Distortion and what to expect

Because only the surface reaches temperature, induction hardening moves a part far less than a furnace cycle. It is often the right answer for a finished or near-finished component where a through-hardening route would need straightening or regrinding afterwards. Tell us the finished tolerance at enquiry and the cycle is planned around it.