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20 10.0AMP PLUNGE ROUTER
OPERATING INSTRUCTIONS
11. Feed rate
The proper rate of feed depends on several factors: the hardness and moisture content of
the workpiece, the depth of cut, and the cutting diameter of the bit. When cutting shallow
grooves in soft woods such as pine, you may use a faster rate of feed. When making deep
cuts in hardwoods such as oak, you should use a slower rate of feed.
a) Feeding too fast
Clean and smooth cuts can only be
achieved when the cutter bit is rotating at
a relatively high speed, taking very small
bites and producing tiny, clean cut chips.
Forcing the feed of the cutter bit forward
too rapidly slows the rotation speed of
the cutter bit, and the bit takes larger
bites as it rotates. Bigger bites mean
bigger chips and a rough finish. This
forcing action can also cause the router
motor to overheat.
Under extreme force-feeding conditions,
the rotations can become so slow and the bites become so large that chips become
partially cut off, causing splintering and gouging of the workpiece.
The router will make clean, smooth cuts if it is allowed to run freely without the overload of
forced feeding. You can detect forced feeding by the sound of the motor. Its usual high-
pitched whine will sound lower and stronger as it loses speed. Holding the router against
the workpiece will also come more difficult.
b) Feeding too slow
When you feed the cutter bit too slowly,
the rotating cutter bit does not cut into
new wood rapidly enough to take a bite.
Instead, it scrapes away sawdust-like
particles. This scraping produces heat,
which can glaze, burn, and mar the cut
in the workpiece and, in extreme cases,
overheat the cutter bit.
When the cutter bit is scraping instead
of cutting, the router is more difficult to
control as you feed it.
Cut
TOO FAST
Bit Shank
Cutter
11a
Cut
TOO SLOW
Bit Shank
Cutter
11b
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