Certa CTPTDCSAWA, Руководство пользователя, Страница: 13 / 40

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Determine the cut line, mark the cut and apply
the disc to the material at moderate speed, to cut
a guide groove before going to top speed and
applying more pressure to the Certa Petrol
Demolition Concrete Saw.
• Keep the disc straight and vertical. Do not tip it,
as this can break it.
•
The best way to get a good, clean-cut is to pull or
move the Certa Petrol Demolition Concrete Saw back and forth. Do not simply press
the disc into the material.
•
Thick round stock is best to cut in stages.
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Thin tubing and pipes can be cut with a simple downward cut.
•
Cut large-diameter pipes as for round stock. To prevent tipping and for better control,
do not let the disc sink too deeply into the material. Instead, always cut shallow
around the whole piece.
•
Worn discs have a smaller diameter than new discs so that at the same engine speed
they have a lower effective circumferential speed and therefore do not cut as well.
• Cut I-beams and L-bars in steps; see Figure 21.
• Cut bands and plates like pipes: along the wide
side with a long cut.
•
When cutting material under stress (supported
material or material in structures), always make
a notch in the thrust (pressure) side and then
cut from the tension side, so that the disc does
not lock-in. Secure cut-off material from falling!
CAUTION!
If there is a chance that the material is under stress, be prepared for it to kickback. Make sure
you can get out of the way if necessary.
Be particularly careful in scrap-metal yards, junkyards, at accident sites and with haphazard
piles of material. Precariously balanced pieces or pieces under stress can act in
unpredictable ways and may slide, jump out or burst. Secure cut-off material from falling!
Always exercise extreme caution and use only equipment that is in perfect working order.
Observe the accident-prevention rules and regulations of your employer and/or insurance
organisation.
Cutting masonry and concrete
IMPORTANT!
Always wear approved respiratory protection!
Asbestos and other materials that can release toxic substances may be cut only after
notifying the proper authorities and under their supervision or that of a person appointed by
them. While cutting pressurised and reinforced concrete piles, follow the instructions and
standards of the responsible authorities or the builder of the structural member.
Reinforcement rods must be cut in the prescribed sequence and by applicable safety
regulations.