Tweco HMC-410 - Manual (Page 8)

HMC-410
1-2 July 27, 2005
11. Do not touch electrode while in contact with the work
(ground) circuit.
12. Use only well-maintained equipment. Repair or replace
damaged parts at once.
13. In confined spaces or damp locations, do not use a
welder with AC output unless it is equipped with a
voltage reducer. Use equipment with DC output.
14. Wear a safety harness to prevent falling if working
above floor level.
15. Keep all panels and covers securely in place.
WARNING
ARC RAYS can burn eyes and skin; NOISE can
damage hearing.
Arc rays from the welding process produce
intense heat and strong ultraviolet rays that
can burn eyes and skin. Noise from some
processes can damage hearing.
1. Wear a welding helmet fitted with a proper shade of
filter (see ANSI Z49.1 listed in Safety Standards) to
protect your face and eyes when welding or watching.
2. Wear approved safety glasses. Side shields
recommended.
3. Use protective screens or barriers to protect others
from flash and glare; warn others not to watch the
arc.
4. Wear protective clothing made from durable, flame-
resistant material (wool and leather) and foot
protection.
5. Use approved ear plugs or ear muffs if noise level is
high.
WARNING
FUMES AND GASES can be hazardous to your
health.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to
your health.
1. Keep your head out of the fumes. Do not breath the
fumes.
2. If inside, ventilate the area and/or use exhaust at the
arc to remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied
respirator.
4. Read the Material Safety Data Sheets (MSDSs) and
the manufacturer’s instruction for metals,
consumables, coatings, and cleaners.
5. Work in a confined space only if it is well ventilated,
or while wearing an air-supplied respirator. Shielding
gases used for welding can displace air causing injury
or death. Be sure the breathing air is safe.
Welding or cutting Electrode Size Filter Welding or cutting Electrode Size Filter
Torch soldering 2 Gas metal-arc
Torch brazing 3 or 4 Non-ferrous base metal All 11
Oxygen Cutting Ferrous base metal All 12
Light Under 1 in., 25 mm 3 or 4 Gas tungsten arc welding All 12
Medium 1 to 6 in., 25-150 mm 4 or 5 (TIG) All 12
Heavy Over 6 in., 150 mm 5 or 6 Atomic hydrogen welding All 12
Gas welding Carbon arc welding All 12
Light Under 1/8 in., 3 mm 4 or 5 Plasma arc welding
Medium 1/8 to 1/2 in., 3-12 mm 5 or 6 Carbon arc air gouging
Heavy Over 1/2 in., 12 mm 6 or 8 Light 12
Shielded metal-arc Under 5/32 in., 4 mm 10 Heavy 14
5/32 to 1/4 in., 12 Plasma arc cutting
Over 1/4 in., 6.4 mm 14 Light Under 300 Amp 9
Medium 300 to 400 Amp 12
Heavy Over 400 Amp 14
Eye protection filter shade selector for welding or cutting
(goggles or helmet), from AWS A6.2-73.