Craftsman 320.2819 operating instructions Feeding TOO Fast Fig, Feeding TOO Slow a

RATE OF FEED (Figs. 18 and '18a)
The proper rate of feed de-						Fig. 18
pends on several factors: the
hardness			and	moisture content			Bit
of the work piece, the depth of
							Shank
cut, and the cutting diameter of
the bit. When you are cutting
shallow grooves in soft woods
such as pine, you may use a
faster rate of feed. When mak-
ing deep cuts in hardwoods
such as oak, you should use a
slower		rate of		feed.
FEEDING TOO FAST (Fig. 18)
Clean		and	smooth		finished	Fig.	18a
cuts can only be achieved
when the cutting bit is rotating
at a relatively high speed, tak-							Bit
ing	very smalr			bites,	producing		Shank
tiny,	clean		cut	chips..			Cut

Forcing the feed of the cutting bit forward too fast slows the

RPM of the cutting bit, and the bit takes bigger bites as it ro- tates,. Bigger bites mean bigger

chips and a rough finish. ThisTOO forcing action can also cause

the router motor to overheat.

!

Under extreme force-feeding conditions, the RPMs cari become so slow and the bites become so large that chips become partially cut _ff, causing splintering and gouging of the work piece.

The router will make clean, smooth cuts if allowed to ruln freely without the over- load of forced feeding. You can detect forced feeding !_ the sound of the motor.. Its usual high-pitched whine will sound lower and stronger as it loses speed.

Holding the router against the work piece will also be s!rained and harder to do

FEEDING TOO SLOW (Fig. 18a)

When you feed the cutting bit too slowly, the rotating c_ itting bit does not cut into new wood fast enough to take a bite. Instead, it scrape ; away sawdust-like par- ticles. This scraping produces heat, which can glaze, b Jrn and mar the cut in the work piece and, in extreme cases, overheat the cutting bit_

When the cutting bit is scraping instead of cutting, the outer is more difficult to control as you feed it.

L

28190 ManuaLRevised_07-0409 i Page 30