Direction Of Feed And Thrust - Craftsman 315.175 Owner's Manual

Tomakedeeper c utsit istherefore necessary t o
makeas manysuccessive p asses as required,
lowering thebit 118 inch
for each new pass. In order to
save time, do all the cutting necessary at one depth
setting, before lowering the bit for the next pass. This
will also assure a uniform depth when the final pass is
completed. See Figure 12.
2ND. 1ST.
PASS PASS
2ND. PASS
1ST. PASS
Fig. 12
DIRECTION OF FEED AND THRUST
The muter motor and bit revolve in a clockwise dirc-
tion. This gives the tool a slight tendency to twist (in
your hands) in a counterclockwise direction, especially
when the motor revs up (as at starting).
Because of the extremely high speed of bit rotation
during a =proper feeding" operation, there is very little
kickback to contend with under normal conditions.
However, should the bit stdke a knot, hard grain,
foreign object, etc. that would affect the normal
pr gress of the cutting action, there will be a slight
kickback p sufficient to spoil the trueness of your cut if
you are not prepared. Such a kickback is always in the
direction opposite to the direction of bit m tation.
To guard against such a kickback, plan your setup and
direction of feed so that you will always be thr sting
the tool -- to hold it against whatever you are using to
guide the cut -- in the same direction that the leading
edge of the bit is moving. In short, the thrst should be
in e dim ction that keeps the sharp edges of the bit
continuously biting straight into new (uncut) wood.
ROUTING
Whenever you are muting a groove, your travel
should be in a dir ction that places whatever guide
you are using at the right-hand side. In short, when
the guide is positioned as shown in the first part of
Figure 13, tool travel should be left to right and
counter Iockwise arund curves. When the guide is
positioned as shown in the second part of Figure 13,
tool travel should be right to left and clockwise around
curves. If there is a choice, the first setup is generally
the easiest to use. In either case, the sideways thrust
you use is against the guide.
GUIDEOUTSIDE
ROTATION
THRUST
ROTATION
GUIDE FEED
GUIDEINSIDE
THRUST
FEED
Fig. 13
12