Delta 20-142C Instruction Manual page 5

ADDITIONAL SAFETY RULES
FOR ABRASIVE CUT-OFF SAWS
WARNING: DO NOT OPERATE YOUR ABRASIVE CUT-OFF SAW UNTIL IT IS COMPLETELY
ASSEMBLED AND INSTALLED ACCORDING TO THE INSTRUCTIONS.
1. If you are not thoroughly familiar with the operation of
abrasive cut-off saws, obtain advice from your supervisor,
instructor or other qualified person.
2. WEAR safety goggles, face shield, respirator, body
apron, headcovering, safety shoes, long tight-fitting
sleeves, and gloves.
3. Use only recommended reinforced abrasive wheels
with blotters.
4. Tighten arbor screw and all clamps before operating.
5. Make sure spindle lock is disengaged before
operating.
6. Always keep guards in place and working properly.
7. Keep hands clear of cut-off wheel.
8. Secure workpiece properly. Work should be straight
and firmly clamped to avoid possible movement and
pinching as the cut nears completion.
9. Never cut anything freehand.
10. Never reach behind or beneath the cut-off wheel.
11. Make sure the wheel has come to a complete stop
before removing or securing workpiece or changing
workpiece angle.
12. Make sure the inside surfaces of the wheel flanges
(as well as the sides of the wheel) are free from any
foreign matter.
13. When mounting the wheel, care should be taken to
tighten the arbor screw only enough to hold the wheel
firmly and to prevent wheel slippage. Excessive tightening
may result in damaging the wheel and springing the
wheel flanges.
14. Use only abrasive wheels rated at 3900 RPM or
higher.
15. Always check the wheel for cracks or other damage
before operation. Replace cracked or damaged wheel
immediately.
16. Use only wheel flanges specified for your machine.
17. Make sure abrasive wheel is not contacting
workpiece before switch is turned on.
18. Allow the motor to come up to full speed before
starting cut.
19. After turning machine on, lower wheel slightly until it
comes in contact with the workpiece and then draw wheel
firmly through the cut. Do not allow the wheel to chatter
and jump as this may cause the wheel to wear out of
round, resulting in poor cutting and possible broken
wheels.
20. Any material is easily cut when placed in position for
the wheel to cut with the least arc of contact.
21. The number of cuts per wheel, as well as the quality
of cut, may vary considerably with the cutting time. Fast
cuts cause the wheel to wear more rapidly but also help
to reduce discoloration and burr. this is especially
noticeable when cutting light gage tubing. When coming
through the bottom wall, with the longer arc of contact, do
not slow-up but give a vigorous pull. This keeps the metal
from overheating and dragging off in a heavy burr.
22. Use the wheel guard at all times.
23. Never operate the machine in an area with flammable
liquids or gases.
24. To avoid electrical shock, do not use under damp
conditions or expose to rain.
25. This tool is designed for ferrous metals only. Do not
attempt to cut wood, masonry, aluminum, or magnesium
with this tool.
26. After installing a new wheel, never start the tool with
a person in line with the wheel. Always run the tool for
approximately one minute before cutting. If the wheel has
an undetected crack or flaw, it could burst in less than
one minute.
27. Shut off power before servicing or adjusting tool.
28. Should any part of your machine be missing, dam-
aged, fail in any way, or any electrical component fail to
perform properly, shut off switch and remove plug from
power supply outlet. Replace missing, damaged, or failed
parts before resuming operation.
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