Porter-Cable 447 Saw User Manual


 
14
Do not force the cut. Let the saw do the cutting at the rate of speed
permitted by the type of cut and the material being cut. When the cut is
completed, release the switch and allow the blade to stop before lifting the
saw from the work. On through-cuts, be sure the lower blade guard is
closed, before setting the saw down.
CROSS-CUTTING
Cutting directly across the grain of a piece of lumber is called crosscutting.
Fig. 14 illustrates a crosscut operation. Position the work so that the cut will
be on the right, as shown.
RIPPING
Cutting wood lengthwise is referred to as ripping. This operation is
performed in the same manner as crosscutting with the exception of
supporting the material to be cut. If material is supported on a large table,
bench or floor, several pieces of scrap stock approximately one inch thick
should be placed beneath the material to allow clearance for the portion of
the saw blade that extends through the material. Large sheets of paneling or
thin plywood supported on saw horses should have 2 x 4’s placed
lengthwise between the horses and the material, to prevent it from sagging
in the center.
For narrow rip cuts, the rip guide, available as an accessory can be used.
The saw is guided by keeping the inner face of the rip guide, Fig. 13, tight
against the edge of the board.
For making wider cuts, such as might be made in plywood and wide sheets,
a wooden guide strip, against which the left edge of the saw base can be
guided, can be tacked or
clamped to the work, as
shown in Fig. 15. NOTE: The
depth of cut must be adjusted
to allow for the thickness of
the wooden guide strip.
BEVEL CUTTING
Bevel cuts are made in the
same manner as crosscuts
and rip cuts. The only
difference is that the blade is
set at an angle between
0° and 45°, as shown in
Fig. 16.
The bevel cut made at
an angle to the edge of
a board is called a
compound cut. There
are certain compound
cuts, on which it may be
necessary to manually
retract the telescoping
guard to allow the blade
to enter into and/or
through the cut.
Fig. 16
Fig. 15