The photo shows the hardening station of an automobile engine crankshaft
induction hardening machine.

During hardening, the coil follows the pin section of the rotating workpiece
as it heats.

※ As seen in the photo, each pin, out of phase with the others,
is treated by a separate coil.

Through this method, our hardening technology is able to achieve:
・low runout
・even casing
・short cycle time
・compact machine design

In recent years, crankshafts have become smaller and thinner to
improve fuel economy.

The pictured crankshaft is a small, thin model, which also required
fillet hardening of the pins and journals.

Using our extensive designing know-how and hands-on experience,
we achieved the specified fillet hardening by designing the coils to
optimize power control.