Each Iron is Tapered, and custom
ground, then fitted to the mortise
and sole profile.

This is a very critical step in plane
making, as it prevents the iron from
slipping while in use as its opposing
wedge holds it in place, and will
actually tend to tighten under the
pressure of cutting.

It also serves to protect the wedge as
it releases the iron and wedge when
struck at the tang. Therefore, the
wedge should never need to be
overpowered to be removed.

IRON FITTING