page9
page 45
Bamboo Journal
Italian Bamboo Rodmakers Association
In this way, it is no longer necessary to plane
away the external part of the strips and remove
the precious “power ibres”. As the tracks are
curved, from now on I will call them “grooves”.
The idea of using a a curved plane has caused
quite a few problems, including the dificulty to
ind curved planes with the right radius and
short enough so to satisfy the hierarchic
sequence we discussed before. After trying a
number of planes, I discovered that very short
curve planes can be found among luthier planes.
The best choice fell on a Herdim plane sold by
DICTUM. It is a lat sole brass plane, 40 mm
long, 18 mm wide, with lat parallel sides (again,
an important feature)
The idea of using a a curved plane has caused
quite a few problems, including the dificulty to
ind curved planes with the right radius and
short enough so to satisfy the hierarchic
sequence we discussed before. After trying a
number of planes, I discovered that very short
curve planes can be found among luthier planes.
The best choice fell on a Herdim plane sold by
DICTUM. It is a lat sole brass plane, 40 mm
long, 18 mm wide, with lat parallel sides (again,
an important feature)
You will need to work the sole of the plane to
make it cylindrical, as well as reconigure the
bevel to make it curved and with a well-deined
radius. The second operation is the more
important of the two because the shape of the
cylindrical groove will have a radius that is
dictated only by the curvature of the projected
cutting edge (as seen sighting along the plane
sole). A few words on the two operations, in
part described by the photos.
Rounding the sole. We suggest you proceed in
two steps.
First, remove most of the material with a ile.
The parts to remove are marked with four lines,
two on the sides and very close to the edge of
the lat sole and two on the lat sole (see
photos). You remove two shallow prisms on the
sides of the plane body. Use a reference plane to
keep the ile angle steady At the end you are left
with three plane surfaces that are tangent to the
cylindrical surface you want to generate (see
photo).
Notice that the central one is part of the original
plane lat bottom, left untouched.