Preparation
5
Material and thickness are determined by type of base metal and value of welding current respectively.
Generally, material of filler wire to be used is the same quality as that of base metal; however, it is
important to select it according to the purpose in a specific case such as welding dissimilar metals.
Reference for selection of filler wire diameter
Welding Current (A)
Filler Wire Diameter (mm)
10 — 20
~ 1.0
20 — 50
~ 1.6
50 — 100
1.0 ~ 2.4
100 — 200
1.6 ~ 3.0
200 — 315
2.4 ~ 4.5
Cooling water
When using a water cooled torch, supply cooling water of specified quantity (1 liter per minute minimum
when using torch of our production) to torch by means of water supply or cooling system.
Care should be taken in this case because the welder does not operate unless the flow of cooling water
is equal to the constant value of 0.7 liter per minute or more. In that case, the warning lamp (Water)
lights.
