Kobalt K7343 Mode D'emploi page 19

Rate of feed
The proper rate of feed depends on several factors: the hardness and moisture content of the
workpiece, the cutting depth, and the cutting diameter of the bit. Use a faster rate of feed when
cutting shallow grooves in soft woods, such as pine. Use a slower rate of feed when making deep
cuts in hardwoods, such as oak.
14. Feeding too quickly
Clean and smooth finished 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 quickly slows
the RPM of the cutter bit and the bit takes larger bites as
it rotates. Larger bites mean larger chips and a rougher
finish. This forcing action can also cause the router motor
to overheat.
Under extreme force-feeding conditions, the rotation can
become so slow and the bites 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. Forced feeding can be detected by the sound of the motor. The usual high-pitched whine
will sound lower and stronger as it loses speed. Holding the router against the workpiece will also
become more difficult.
15. Feeding too slowly
When the cutter bit is fed too slowly, the rotating cutter
bit does not cut into new wood fast 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.
With almost no load on the motor, the cutter bit has
a tendency to bounce off the sides of the cut in the
workpiece, producing a cut that has a rippled finish
instead of clean, straight sides.
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