17
identical replacement parts.
This will ensure that the safety of the power tool is maintained.
3 Safety instructions for all saws
Cutting procedures
a)
DANGER: Keep hands away from cutting area 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.
NOTE For circular saws with 140 mm or smaller diameter blades, the "Keep your
second hand on
auxiliary handle, or motor housing" may be omitted.
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 piece being cut in your hands or across your leg. Secure the
workpiece to a stable platform.
It is important to support the work properly to
minimize body exposure, blade binding, or loss of control.
e)
Hold the power tool by insulated gripping surfaces only, when performing an
operation where the cutting tool may contact hidden wiring or its own cord.
Contact with a "live" wire will also make exposed metal parts of the power tool "live"
and could give the operator an electric shock.
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
eccentrically, 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.
3
、
CAUSES AND OPERATORS PREVENTION OF KICKBACK
•
kickback is a sudden reaction to a pinched, bound or misaligned saw blade, causing an
uncontrolled saw to lift up ad 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.
Kickback is result of saw misuse and/or incorrect operating procedures or
conditions and can be avoided by taking proper precautions as given below:
18
•
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.
•
When the 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.
•
When restarting the saw in the workpiece, centre the saw blade in the kerf and
check that saw teeth are not engaged into the material.
I
f saw blade is binding, it
may walk up or kickback from the workpiece as the saw is restarted.
•
Support large panels to minimize 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.
•
Do not use dull or damaged blades.
Unsharpened or improperly set blades produce
narrow kerf causing expressive friction, blade binding and kickback.
•
Blade depth and bevel adjusting locking levers must be tight and secure before
making cut.
If blade adjustment shifts while cutting, it may cause binding and kickback
.
•
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.
CHECK LOWER GUARD
•
Check lower guard for proper closing before each use. Do not operate the saw if
lower guard does not move freely and close instantly. Never clamp or tie the lower
guard into the open position.
If saw is accidentally dropped, lower guard may be bent.
Raise the lower guard with the retracting handle and make sure it moves freely and does
not touch the blade or any other part, in all angles and depths of cut.
•
Check the operation of the lower guard spring. If the guard and the spring are not
operating properly, they must be serviced before use.
Lower guard may operate
sluggishly due to damaged parts, gummy deposits, or a build-up of debris.
•
Lower guard should be retracted manually only for special cuts as „plunge
cuts“ and „compound cuts“. Raise lower guard by retracting handle and as soon
as blade enters the material, the lower guard must be released.
For all other sawing,
the lower guard should operate automatically.
•
Always observe that the lower guard is covering the blade before placing saw
down on bench or floor.
An unprotected, coasting blade will cause the saw to walk
backwards, cutting whatever is in path. Be aware of the time it takes for the blade to stop
after switch is released.
