DeWalt DC351 Manual De Instrucciones página 18

4. When you have finished the plunge cut, turn the anti-kickback
knob (U) clockwise into the lock position.
CROSS-CUTTING
Cutting directly across the grain of a piece of lumber is called
crosscutting. Figures 10 and 11 illustrate a crosscut operation.
Position the work so that the cut will be on the left.
FIG. 10
RIPPING
Ripping is cutting wood lengthwise. This operation is performed in
the same manner as crosscutting with the exception of supporting
the workpiece. If the workpiece is supported on a large table, bench,
or floor, several pieces of scrap stock approximately 1" (25.4 mm)
thick should be placed beneath the material to allow clearance
for the portion of the saw blade that extends thru the workpiece.
Large sheets of paneling or thin plywood supported on saw horses
should have 2 x 4's placed lengthwise between the horses and the
workpiece to prevent it from sagging in the center.
BEVEL CUTTING
Make your bevel cuts in the same manner as crosscuts and rip cuts,
but set the blade at an angle between 0° and 47°.
The bevel cut made at an angle to the edge of a board is called a
compound cut.
KICKBACK
When the saw blade becomes pinched or twisted in the cut, kickback
can occur. The saw is thrust rapidly back toward the operator. When
the blade is pinched or bound tightly by the kerf closing down, the
blade stalls and the motor reaction drives the unit backward. When
FIG. 11
the blade becomes twisted or misaligned in the cut, the teeth at the
back edge of the blade can dig into the top surface of the wood causing
the blade to climb out of the kerf and jump back toward the operator.
Kickback is more likely to occur when any of the following conditions
exist.
1. IMPROPER WORKPIECE SUPPORT
2. IMPROPER DEPTH OF CUT SETTING ON SAW
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A. Sagging or improper lifting of the cut off piece can cause
pinching of the blade and lead to kickback.
B. Cutting through material supported at the outer ends only
can cause kickback. As the material weakens it sags, closing
down the kerf and pinching the blade.
C. Cutting off a cantilevered or overhanging piece of material
from the bottom up in a vertical direction can cause kickback.
The falling cut off piece can pinch the blade.
D. Cutting off long narrow strips (as in ripping) can cause
kickback. The cut off strip can sag or twist closing the kerf and
pinching the blade.
E. Snagging the lower guard on a surface below the material
being cut momentarily reduces operator control. The saw
can lift partially out of the cut increasing the chance of blade
twist.
To make the most efficient cut, the blade should protrude only
far enough to expose 1/2 of a tooth. This allows the shoe to