Safety Instructions For All Saws; Causes And Operator Prevention Of Kickback; Safety Instructions For Plunge-Type Saws - DeWalt DWS520 Series Manual

EnGLIsh
h ) Keep handles and grasping surfaces dry, clean and
free from oil and grease. Slippery handles and grasping
surfaces do not allow for safe handling and control of the
tool in unexpected situations.
5) Service
a ) Have your power tool serviced by a qualified repair
person using only identical replacement parts. This
will ensure that the safety of the power tool is maintained.
ADDITIONAL SPECIFIC SAFETY RULES

Safety instructions for all saws

DANGER: Keep hands away from cutting area
a )
and the blade. Keep your second hand on auxiliary
handle, or motor housing. If both hands are holding the
saw, they cannot be cut by the blade.
b ) Do not reach underneath the workpiece. The guard
cannot protect you from the blade below the workpiece.
c ) Adjust the cutting depth to the thickness of the
workpiece. Less than a full tooth of the blade teeth should
be visible below the workpiece.
d ) Never hold the workpiece being cut in your hands or
across your leg while cutting. Secure the workpiece
to a stable platform. It is important to support the work
properly to minimise body exposure, blade binding, or loss
of control.
e ) Hold power tool by insulated gripping surfaces,
when performing an operation where the cutting
tool may contact hidden wiring. Contact with a "live"
wire will also make exposed metal parts of the power tool
"live" and shock the operator.
f ) When ripping always use a rip fence or straight edge
guide. This improves the accuracy of cut and reduces the
chance of blade binding.
g ) Always use blades with correct size and shape
(diamond versus round) of arbour holes. Blades that
do not match the mounting hardware of the saw will run
off-centre, causing loss of control.
h ) Never use damaged or incorrect blade washers or
bolt. The blade washers and bolt were specially designed
for your saw, for optimum performance and safety
of operation.

Causes and Operator Prevention of Kickback

• Kickback is a sudden reaction to a pinched, bound or
misaligned saw blade, causing an uncontrolled saw to lift up
and out of the workpiece 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
rapidly back toward the operator;
• If 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.
22
Kickback is the result of saw misuse and/or incorrect operating
procedures or conditions and can be avoided by taking proper
precautions as given below:
a ) Maintain a firm grip with both hands on the saw and
position your arms to resist kickback forces. Position
your body to either side of the blade, but not in line
with the blade. Kickback could cause the saw to jump
backwards, but kickback forces can be controlled by the
operator, if proper precautions are taken.
b ) When blade is binding, or when interrupting a cut
for any reason, release the trigger and hold the saw
motionless in the material until the blade comes to
a complete stop. Never attempt to remove the saw
from the work or pull the saw backward while the
blade is in motion or kickback may occur. Investigate
and take corrective actions to eliminate the cause of
blade binding.
c ) When restarting a saw in the workpiece, centre the
saw blade in the kerf and check that saw teeth are
not engaged into the material. If saw blade blinds, it
may walk up or kickback from the workpiece as the saw
is restarted.
d ) Support large panels to minimise the risk of blade
pinching and kickback. Large panels tend to sag
under their own weight. Supports must be placed under
the panel on both sides, near the line of cut and near the
edge of the panel.
e ) Do not use dull or damaged blades. Unsharpened
or improperly set blades produce narrow kerf causing
excessive friction, blade binding and kickback.
f ) Blade depth and bevel adjusting locking levers must
be tight and secure before making the cut. If blade
adjustment shifts while cutting, it may cause binding
and kickback.
g ) Use extra caution when making a "plunge cut" into
existing walls or other blind areas. The protruding
blade may cut objects that can cause kickback.

Safety Instructions for Plunge-Type Saws

a ) Check the guard for proper closing before each use.
Do not operate the saw if the guard does not move
freely and enclose the blade instantly. Never clamp
or tie the guard so that the blade is exposed. If the
saw is accidentally dropped, the guard may be bent. Check
to make sure that the guard moves freely and does not
touch the blade or any other part, in all angles and depths
of cut.
b ) Check the operation and condition of the guard
return spring. If the guard and the spring are not
operating properly, they must be serviced before use.
The guard may operate sluggishly due to damaged parts,
gummy deposits, or a build-up of debris.
c ) Assure that the base plate of the saw will not shift
while performing a "plunge cut". Blade shifting
sideways will cause binding and likely kickback.