BTI HKS 61 Notice D'utilisation page 48

EN GLI SH
4. Select the proper blade for the application
(refer to Blades). Always use blades that are
the correct size (diameter) with the proper size
and shape center hole for mounting on the
saw spindle. Always assure that the maximum
recommended speed (rpm) on the saw blade
meets or exceeds the speed (rpm) of the saw.
5. Follow steps 1 through 5 under To Install the
Blade, making sure that the blade will rotate in
the proper direction.
LOWER BLADE GUARD
WARNING: The lower blade guard is
a safety feature that reduces the risk
of serious personal injury. Never use
the saw if the lower guard is missing,
damaged, misassembled or not working
properly. Do not rely on the lower
blade guard to protect you under all
circumstances. Your safety depends on
following all warnings and precautions
as well as proper operation of the
saw. Check the lower blade guard for
proper closing before each use. If the
lower blade guard is missing or not
working properly, have the saw serviced
before using. To assure product safety
and reliability, repair, maintenance and
adjustment should be performed by
an authorized service center or other
qualified service organization, always
using identical replacement parts.
CHECKING THE LOWER GUARD (FIG. 1)
1. Turn tool off and disconnect from power supply.
2. Rotate the lower guard lever (fig. 1, l) from the
fully closed position to the fully open position.
3. Release the lever and observe the guard (j)
return to the fully closed position.
The tool should be serviced by a qualified service
center if it:
• fails to return to the fully closed position,
• moves intermittently or slowly, or
• contacts the blade or any part of the tool in all
angles and depth of cut.
BLADES
WARNING: To minimize the risk of
eye injury, always use eye protection.
Carbide is a hard but brittle material.
Foreign objects in the workpiece such
as wire or nails can cause tips to crack
or break. Only operate saw when proper
saw blade guard is in place. Mount
46
blade securely in proper rotation before
using, and always use a clean, sharp
blade.
Diameter Teeth
190 mm 24
190 mm 40
If you need assistance regarding blades, please
contact your local BTI contact.
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 material
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 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. 24).
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. 24).
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
Depth of Cut Adjustment.
Application
Rip
General purpose