Working safely with cut-off machines
English
4
THE POWER TOOL
For illustrations and definitions of the
parts of the cut-off machine, see the
chapter "Main Parts."
Abrasive Wheels
Abrasive wheels for free-hand cutting
are subjected to particularly high
bending and compression stresses.
Unauthorized diamond abrasive wheels
that utilize poor quality steel cores, that
are not properly tensioned, or that have
other design or manufacturing defects
may begin to wobble during use, which
can cause wheel breakage. Such
wobbling can also lead to a severe
binding of the wheel in the kerf, that,
under certain circumstances, can then
result in serious or fatal injury from
reactive forces. See the section entitled
"Reactive Forces including Kickback."
Never use a wheel that wobbles or that
has ever wobbled. Even though such a
wheel may temporarily cease to wobble,
e.g., if run without load, it will always be
prone to wobble again under certain
conditions. Replace it immediately
before further use.
Composite abrasive wheels are heat
sensitive. Always store your cut-off
machine in a place where a composite
wheel is not exposed to direct sunlight or
other sources of heat. Store spare
composite wheels in a dry place where
there is no risk of frost damage. Failure
to follow these directions may cause the
wheel to shatter or crack in use causing
serious or fatal injury.
Warning!
When wet cutting at the
recommended flow rate
is not utilized, the oper-
ator should always wear
a respirator approved
by NIOSH / MSHA for
the material being cut to reduce the risk
of serious or fatal respiratory illness. For
additional details and warnings on this
subject, see information under "Working
Conditions" in this instruction manual.
Warning!
Never modify a cut-off machine in any
way. Only attachments supplied by
STIHL or expressly approved by STIHL
for use with the specific STIHL cut-off
machine models are authorized.
Although certain unauthorized attach-
ments are useable with the STIHL
powerhead, their use may, in fact, be
extremely dangerous.
Warning!
Before mounting the cutting wheel,
make sure that the maximum operating
wheel speed is above or equal to the
spindle speed of your cut-off machine
as provided in the specifications of this
manual. A wheel that is not so rated
may shatter or break and poses a threat
of serious or fatal injury to the operator
and other nearby persons.
Warning!
Unauthorized wheels may be more
likely to shatter or break. Use only
STIHL wheels or other authorized
wheels with approved RPM ratings.
Read and follow any addional safety
precautions that accompany the wheel.
Warning!
Inspect the abrasive
wheel frequently and
replace immediately if
the abrasive wheel is
cracked or warped.
Cracked or warped
wheels may shatter or break and cause
serious or fatal personal injury. Out-of-
round or unbalanced abrasive wheels
increase vibration and reduce the serv-
ice life of the cut-off machine.
Warning!
Never use circular saw
blades, carbide tipped
blades, rescue blades,
wood-cutting blades or
toothed blades of any
nature. They can cause
severe personal injury from blade con-
tact, thrown objects and / or reactive
forces, including kickback. See section
on "Reactive Forces." Your STIHL
dealer stocks a range of special abra-
sive wheels for the many applications of
the cut-off machine.
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