Shindaiwa EC741s Manuel D'utilisation page 28

Operation
1. Follow snap line
1. Keep wheel moving
1. Cut in a straight line
2. Saw will bind in crocked cut
1. Roll pipe to cut 360° around
2. Try not to let wheel break through in one place
4. Always throttle up to cutting speed before letting the wheel
make contact. The saw may be jerked forward, causing loss
of control, if wheel is in contact during throttling up. Carefully
let cutting edge of wheel make light contact with the work. Do
not push or bounce the wheel onto the work. Hold saw
steady. Do not let it tilt or wobble.
5. Do not let the wheel stop in one place, but keep it moving -
in one direction, or back and forth, along the line of cut. Cut-
ting in one spot causes heat build-up which can damage or
glaze the wheel. Too much cutting pressure also causes
overheating.
6. Cut as shallow and straight a groove as you can. If you cut a
curve, the wheel will start to bind as the cut deepens.
7. Go over and over the groove you have started until the cut is
completed.
8. On cuts of long duration, remove saw from cut often to let the
wheel cool.
9. Never put any side pressure on a engine cut-off saw wheel,
grind on the side of it or use it to flick away debris.
10. When cutting large diameter pipe, cut 360 degrees around
and try not to cut through. If a large segment of the wheel
breaks through, the wheel may catch and kick out at light-
ning-fast speed.
11. Before cutting materials which are not supported along their
entire length, provide support to prevent binding. Also be
aware that the top section will settle on the wheel if a column
is cut in two.
12. Be careful not to cut your own legs in the downward cutting.
Be particularly careful at the end of cutting.
Cutting Asphalt, Tar and Reinforced Materials
Old, cold and hardened asphalt paving can be cut with a ma-
sonry wheel with good results and little trouble with tarring of
the wheel. Fresh asphalt and tarred surfaces can gum up the
wheel and slow its cutting action. Some tar or resin-impregnat-
ed materials also may present problems of this sort.
Masonry containing metal reinforcement is best cut with a ma-
sonry wheel which can cut through the reinforcing steel better
than a wheel designed for metal can cut the masonry. Expect
faster than normal wheel wear.
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