Edging With A Pilot Bit; Top Edge Shaping; Whole Edge Shaping - Craftsman 320.2768 Operator's Manual

NOTE: Making a single deep cut is never advisable. Smaller-diameter bits are
easily broken by too much side thrust and torque. Larger bits will cause a rough
cut and be difficult to guide and control. For these reasons, do not exceed 1/8-
in. depth of cut in a single pass.
_, WARNING: Always securely clamp your workpiece in place, and keep a firm
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.
EDGING WITH A PILOT BIT (Figs.15 and 15a
The arbor-type bits with pilots are excellent
for edge shaping any workpiece edge that is
straight, or is curved at a curvature equal to 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
firmly in contact with the workpiece edge
throughout prevents the cut from becoming
too shallow.
Top Edge Shaping
Whenever the workpiece thickness, together
with the desired depth of cut (as adjusted by
router depth setting) are such that only the
top part of the edge is to be shaped (leaving
at least a 1/16 in. thick uncut portion at the
bottom), the pilot can ride against the uncut
portion, which serves to guide it. (Fig.15)
Fig. 15
Motor Housing
Pilot Fixed Base Work-
sub-base piece
TOP EDGE SHAPING
Fig. 15a
Whole Edge Shaping
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 Guide Board
be placed under the workpiece to act as a
guide (Fig.15a). This "guide" board must WHOLE EDGE SHAPING
have exactly the same contour--"straight or
curved" --as the workpiece edge. If it is positioned so that its edge is flush 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 (out from the workpiece edge), the bit will
make less than a full cut---which will alter the shape of the finished edge.
NOTE: 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 all of the bits; the large one reduces this amount by 1/16 in.). 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 firm 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.
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