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1-1. Preparing Tungsten Electrode For DC Electrode Negative (DCEN) Welding

Or AC Welding With Inverter Machines

9-2.

Preparing Tungsten Electrode For DC Electrode Negative (DCEN) Welding Or AC

Welding With Inverter Machines

Wrong Tungsten Preparation — Radial Grinding Causes Wandering Arc

Ideal Tungsten Preparation — Stable Arc

Grinding the tungsten electrode produces dust and flying sparks which can cause injury and start fires.

Use local exhaust (forced ventilation) at the grinder or wear an approved respirator. Read MSDS for safety

information. Consider using tungsten containing ceria, lanthana, or yttria instead of thoria. Grinding dust

from thoriated electrodes contains low-level radioactive material. Properly dispose of grinder dust in an

environmentally safe way. Wear proper face, hand, and body protection. Keep flammables away.

Grinding the tungsten electrode

produces dust and flying sparks

which can cause injury and start

fires. Use local exhaust (forced

ventilation) at the grinder or wear

approved

respirator.

MSDS for safety information. Con-

sider using tungsten containing

ceria, lanthana, or yttria instead of

thoria. Grinding dust from thori-

ated electrodes contains low-level

radioactive material. Properly dis-

pose of grinder dust in an environ-

mentally safe way. Wear proper

face, hand, and body protection.

Keep flammables away.

1 Grinding Wheel

Grind end of tungsten on fine grit, hard abra-

sive wheel before welding. Do not use wheel

for other jobs or tungsten can become conta-

minated causing lower weld quality.

2 Tungsten Electrode

A 2% ceriated tungsten is recommended.

3 Ideal Grind Angle Range: 15° to 30°

�

30 degrees is the recommended elec-

trode grind angle.

4 Straight Ground

Grind lengthwise, not radial.

5 1–1/2 to 4 Times Electrode Diameter

OM-285986 Page 31

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