13
Kickback is more likely to occur when any of the following conditions exists.
1. IMPROPER WORKPIECE SUPPORT
A. Sagging or improper lifting of the cut off piece can cause pinching of the blade
and lead to kickback (Fig. 9).
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
(Fig. 9).
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 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.
2. IMPROPER DEPTH OF CUT SETTING ON SAW
To make the most efficient cut, the blade should protrude only far enough to
expose a tooth as shown in Figure 8. This allows the shoe to support the blade
and minimizes twisting and pinching in the material. See the section titled
Cutting
Depth Adjustment
.
3. BLADE TWISTING (MISALIGNMENT IN CUT)
A. Pushing harder to cut can cause the blade to twist.
B. Trying to turn the saw in the cut (trying to get back on the marked line) can
cause blade twist.
C. Overreaching or operating the saw with poor body control (out of balance),
can result in twisting the blade.
D. Changing hand grip or body position while cutting can result in blade twist.
E. Backing up the saw to clear blade can lead to twist.
4. USE OF DULL OR DIRTY BLADES
Dull blades cause increased loading of the saw. To compensate, an operator will
usually push harder which further loads the unit and promotes twisting of the
blade in the kerf. Worn blades may also have insufficient body clearance which
increases the chance of binding and increased loading.
5. RESTARTING A CUT WITH THE BLADE TEETH JAMMED AGAINST THE
MATERIAL
The saw should be brought up to full operating speed before starting a cut or
restarting a cut after the unit has been stopped with the blade in the kerf. Failure to
do so can cause stalling and kickback.
Any other conditions which could result in pinching, binding, twisting, or misalignment
of the blade could cause kickback. Refer to the sections
Further Safety Instructions
for All Saws
and
Blades
for procedures and techniques that will minimize the
occurrence of kickback.
Depth Adjustment (Fig. 7, 8)
WARNING: To reduce the risk of injury, turn unit off and disconnect it from
power source before installing and removing accessories, before adjusting or
when making repairs.
An accidental start-up can cause injury.
The metal-cutting saw is equipped with a pivoting shoe that allows the operator to
set the depth of cut. For the most efficient cutting action, set the depth adjustment so
that one tooth of the blade projects below the material to be cut. This distance is from
the tip of the tooth to the bottom of the gullet in front of the tooth. This keeps blade
friction at a minimum, removes metal chips from the cut, results in cooler, faster
sawing and reduces the chance of kickback.
FIG. 7
C
FIG. 8
Содержание XR Li-Ion DCS373-XE
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