At Fuji Denshi, we design, manufacture, and sell induction heating machines
as well as do job heat treatment and prototype development.

The photo shows our stub shaft axle hardening and reheating machine.

The one-shot hardening method using our line coil achieves an ideal case
pattern even with the varying diameter of the workpiece, while saving energy.

The entire length of the workpiece is quenched simultaneously,
ensuring the residual heat over the part's length is even and
preventing cracking and uneven case hardness and depth.
(Even heating / Even quenching)

Heating and quenching are both even over the entire surface,
so runout is kept at a minimum even without the need for a straightening roller.
The residual stress along the axle axis contribues to large increases
in the part's durability and strength.
(2x by comparison)

Scan hardening can easily cause uneven hardness and low axial strength.
Our one-shot hardening requires only half the power of scan hardening to better results.