Craftsman 315.175101 Operator's Manual page 17

OPERATION
ROUTING WITH GUIDE BUSHINGS
ROUTER
When using the Template Guide Bushings Item No.
9-25082 with your router, you must visually center the
WORK
bit with the bushing before beginning your cut. Your
router subbase may be adjusted by loosening the
screws holding the subbase to your router. Be sure to
tighten locking arm before centering bit in bushing.
After centering bit with bushing, tighten screws
PILOT
securely.
EDGING WITH PILOT BITS TOP EDGE SHAPING
See Figure 17.
Arbor-type bits with pilots are excellent for quick,
easy, edge shaping. They will follow workpiece edges
ROUTER
that are either straight or curved. The pilot prevents
GUIDE
the bit from making too deep a cut; and holding the
WORK
pilot firmly in contact with the workpiece edge
throughout prevents the cut from becoming too
shallow.
Whenever the workpiece thickness together with the
PILOT
desired depth of cut (as adjusted by router depth
setting) are such that only the top part of the edge is
WHOLE EDGE SHAPING
to be shaped (leaving at least a 1/16 inch thick uncut
portion at bottom), the pilot can ride against the uncut
Fig. 17
portion, which will serve to guide it. See Figure 17.
However, if the workpiece is too thin or the bit set too
low so that there will be no uncut edge to ride the pilot
against, an extra board to act as a guide must be
placed under the workpiece. 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 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 as shown in
Figure 17 (out from the workpiece edge), the bit will
make less than a full cut — which will alter the shape
of the finished edge.
NOTE: Any of the piloted bits can be used without a
pilot for edge shaping with guides, as preceding. 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 bit; the large one reduces this amount by
1/16 inch.
17