Husqvarna K 970 RESCUE - Manual (Page 15)

English – 15
OPERATING
• Move the blade slowly forwards and backwards to achieve
a small contact area between the blade and the material
to be cut. This reduces the temperature of the blade and
ensures effective cutting.
Cutting with toothed/carbide tipped blades
during rescue operaions
If the public safety force (fire department) that purchased this
power cutter has decided to equip this unit with a carbide
tipped blade for rescue operations, the following safety
considerations must be adhered to.
Training and protective equipment
• Only operators trained in the use of cutting with a power
cutter equipped with carbide tipped blade shall be allowed
to operate the power cutter.
• Full protective fire fighting gear shall be worn by the
operator at all times.
• A full face shield (not just protective eye glasses) shall be
worn by the operator to protect the face from flying debris
or a sudden kick-back of the power cutter.
Risk area
No persons that do not have the protective equipment
described above shall be allowed inside the risk area for
thrown material.
Blade speed
Apply the cutting blade gently with high rotating speed (full
throttle) Maintain full speed until cutting is complete. Low
blade speed, especially in hard and thin materials can result
in jamming and the breaking-off of the carbide tips.
Thin material
Cutting thin and hard material (i.e. a sheet metal covered roof)
should be conducted in a forward direction for best control.
Pinching or jamming
Make a careful evaluation of how the object will move during
the final stage of the cutting to avoid pinching or jamming. The
cut must open during the cut. If the object sags and the cut
begins to close the blade may pinch, possibly resulting in a
kick-back or damage to the blade.
Cutting in line
Skewing or twisting in the line of cut will reduce cutting
efficiency and damage the blade.
Before each rescue operation
Check that the blade and th blade guard is not damaged or
cracked. Replace the blade or the blade guard if it is exposed
to impact or is cracked.
• Check that no carbide tips have loosened from the cutting
blade.
• Check that the blade is not skew or shows signs of
cracking or other defects.
When cutting in hard materials carbide tipped blades will
rapidly lose its sharpness. For best performance during
rescue operations we recommend that a new blade be
installed.
Kickback
Kickback is the sudden upward motion that can occur if the
blade is pinched or stalled in the kickback zone. Most
kickbacks are small and pose little danger. However a
!
WARNING! A power cutter should never be
used with carbide tipped blade for non-
emergency work, such as in the
construction trades.
Be aware at all times that carbide tipped
blades are more kickback prone than
abrasive or diamond blades if not used
properly.
20 m (66 ft)
!
WARNING! Kickbacks are sudden and can
be very violent. The power cutter can be
thrown up and back towards the user in a
rotating motion causing serious or even fatal
injury. It is vital to understand what causes
kickback and how to avoid it before using
the machine.