At Fuji Denshi, we have developed state-of-the art induction heating technology
capable of achieving high precision, high strength, and environmentally friendly
heat treatment.

We refer to this technolgoy as precision hardening.

★Driveshaft Hardening★

By using our semi-open coil and single-shot method, an ideal casing is formed,
while evenly creating residual stress over the shaft surface, and as a result
greatly increasing fatigue strength and torsion strength.
This method far surpasses scan hardening in terms of hardened strength,
evenness, and power consumption.

As one of the first manufacturers to use line coils, we added support rollers
and other innovations to create the best driveshaft hardening process.

~Driveshaft Hardening~