ZHEN
51
Recognising faulty
wearing parts
1. Insulating parts
- Notches
- Burned off or torn middle
bar
- Scorched or torn-off shoul-
ders
2. Nozzle fittings
- Notches and burns on the
front edge
- heavily covered in welding
spatter
3. Spatter guard
- Burned-off outside edges
- Notches
4. Contact tubes
- Worn out (oval) wire entry
and wire exit holes
- Heavily covered in welding
spatter
- Burns on the tip of the
contact tube
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