Craftsman 315.275000 - Manual (Page 12)

OPERATION
To make deeper cuts it is therefore necessary to
make as many successive passes as required,
lowering the bit 1/8 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 PASS
Fig.12
DIRECTION OF FEED AND THRUST
The router motor Itnd bit revolve in a clockwise direction.
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. How­
ever, should the bit strike a knot, hard grain, foreign
object, etc. that would affect the normal progress of the
cutting action, there will be a slight kickback — 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 rotation.
To guard against such a kickback, plan your setup and
direction of feed so that you will always be thrusting the
tool — to hold it against whatever you áre using to guide
the cut— in the same direction that the leading edge of
the bit is moving. In short, the thrust should be in a
direction that keeps the sharp edges of the bit continu­
ously biting straight into new (uncut) wood.
ROUTING
Whenever you are routing a groove, your travel
should be in a direction 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
counterclockwise around 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.
GUIDE OUTSIDE
ROTATION
THRUST
ROTATION
GUIDE
FEED
FEED
Fig. 13
12