Festool MFS Fence System Instruction Manual page 29

collet. The guide bushing is placed over
the cone shape which holds it concentric
to the collet as the guide bushing is tight-
ened down. On the Festool 1400 the
guide bushings snap into place, auto-
matically being held concentric to the
collet by the tangs and receivers ma-
chined into the guide ring and router base
as pictured below.
The outer edge of the guide bushing fol-
lows the pattern or template to produce
the desired cut. If the guide bushing is,
say, 20mm in diameter and the router bit
is 10mm in diameter, then one edge of
the cut will be 5mm away from the edge
of the pattern or template and the other
edge of the cut will be 15mm away.
Guide bushings simply snap in
place properly centered on 1400
29
Removing the 1010 baseplate.
Guide bushing and centering
mandrel in foreground
Guide bushing centered over
mandrel and tightened down on
1010
This relationship is always such that one
cut edge is away from the edge of the
pattern or template by half of the differ-
ence in diameter between the (outside
diameter of the) guide bushing and the
diameter of the router bit. The other cut
edge is that plus the diameter of the
router bit since the router bit will plow a
groove in the work piece its own diameter
wide.
Knowing this, one can use the same
router bit and template and, by changing
guide bushings, can cut both a female
recess and a matching male insert which
will exactly fit the recess everywhere ex-