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Page 17
EDGING WITH A PILOT
BIT (FIG. 16-17)
Arbor-type bits with pilots are excellent for
edge shaping of any workpiece edge that
is either straight or curved at a curvature
as great as or greater than the radius of the
bit to be used. The pilot prevents the bit
from making an excessively deep cut; and
holding the pilot rmly in contact with the
workpiece edge throughout prevents the cut
from becoming too shallow.
FIG. 16
Motor housing
Spindle lock
Cutter bit
Pilot
Fixed base
sub-base
Work piece
TOP EDGE SHAPING
FIG. 17
Work piece
Guide board
Whole edge of workpiece
WHOLE EDGE SHAPING
TOP EDGE SHAPING (FIG. 16)
Whenever the workpiece thickness, together
with the desired depth of cut (as adjusted by
the cutting-depth setting) are such that only the
top part of the edge is to be shaped (leaving at
least a 1/16”. thick uncut portion at the bottom),
the pilot can ride against the uncut portion,
which serves to guide it (FIG. 16).
WHOLE EDGE SHAPING (FIG. 17)
If the workpiece is too thin or the bit is set so
low that there will be no uncut edge against
which to ride the pilot, an extra board must
be placed under the workpiece to act as
a guide (FIG. 17). This “guide” board must
have exactly the same contour - straight
or curved - as the workpiece edge. If it is
positioned so that its edge is ush with the
workpiece edge, the bit will make a full cut
(in as far as the bit radius). On the other
hand, if the guide is positioned so that it
extends beyond the edge of the workpiece),
the bit will make less than a full cut - which
will alter the shape of the nished edge.
NOTICE: The size (diameter) of the pilot
that is used determines the maximum
cut width that can be made with the pilot
against the workpiece edge. (The small
pilot exposes the entire bit; the large one
reduces this amount by 1/16”.) Any of the
piloted cutter bits can be used without a
pilot for edge shaping with guides.
WARNING:
Always securely clamp
your workpiece and keep a rm grip on
the router base with both hands at all
times. Failure to do so could result in
loss of control causing possible serious
personal injury.
OPERATION
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