Technical Specifications

Page 20
FEEDING TOO RAPIDLY (FIG. 22)
Clean and smooth nished cuts can only
be achieved when the cutting bit is rotating
at a relatively high speed, taking very small
bites, and producing tiny, clean-cut chips.
Forcing the feed of the cutting bit forward
too rapidly slows the revolution of the
cutting bit, and the bit takes larger bites as it
rotates. Larger bites mean larger chips and
a rough nish. This forcing action can also
cause the router motor to overheat.
Under extreme force-feeding conditions,
the revolutions can become so slow and
the bites become so large that chips are
only 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
louder as it loses speed. Holding the router
against the workpiece will also be more
difcult to do.
FEEDING TOO SLOWLY (FIG. 23)
When you feed the cutting bit too slowly, the
rotating cutting 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 cutting bit.
When the cutting bit is scraping instead of
cutting, the router is more difcult to control
as you feed it.
With almost no load on the motor, the
cutting bit has a tendency to bounce off the
sides of the cut in the workpiece, producing
a cut with a rippled nish instead of clean,
straight sides.
FIG. 23
Bit shank
Cut
Cutter
TOO SLOW
OPERATION