Miller Dialarc HF
TIG (Tungsten Inert Gas) welding is particularly useful for aluminium, It uses an electrode nozzle with a fixed (should be permanent, but they do wear) tungsten tip where a plasma 'flame' is created (started with a high-voltage / high freequency starter) and used to heat the filler wire and joint. The nozzle allows a flow of inert shield gas around the working area, reducing slag creation and (particularly important with aluminium) oxidation.
The TIG welder is a 'stick' welder - the electrode / nozzle is held in one hand, and the filler wire applied with the other.
NB: an induction is required to use this tool safely - ask on the mailing list/Google Group
For the TIG we use a Pureshield Argon.
Gas bottle replacement log
Capacity and rating
The Tig welder has a large range
Tungsten and collets
We have a selection of the following tungsten tips and collets to fit
|Size||Color band||Grade||Used for||Notes|
|1.6mm||Red||2% Thoriated||DCEN Steel||Slightly radioactive! Do not sharpen without wearing a dust mask.|
|2.4mm||Red||2% Thoriated||DCEN Steel||Slightly radioactive! Do not sharpen without wearing a dust mask.|
|1.6mm||Gold||1.5% Lanthanated||AC or DCEN, All rounder Steel or Aluminium|
|2.4mm||Gold||1.5% Lanthanated||AC or DCEN, All rounded Steel or Aluminium|
Tungsten electrodes come in a a range of different grades/types, each performs differently and have their own uses.
They are marked with a colour band at one end, do not grind this off!
The following was borrowed from here
ZIRCONIATED Tungsten Color Code WHITE or BROWN, are best suited for AC Tig welding applications.
Zirconiated, White, AC Welding applications. Better start up than Pure Tungsten, Balls up well and has a more stable arc than Pure Tungsten. Better current carrying capacity and high resistance to contamination during welding.
LANTHANATED Tungsten Color Code BLACK, GOLD or BLUE, is suitable for AC & DC welding applications.
Lanthanated, Black, AWS Class EWLA-1.5, AC & DC welding applications. Non-Radioactive Good arc characteristics in ac/dc applications. Applications: carbon & stainless steel, nickel alloys and titanium.
CERIATED Tungsten Color Code GREY or ORANGE, are best suited for low amperage DC welding applications.
Ceriated, Grey, An excellent alternative to Thoriated tungsten especially in low amperage welding. Takes 10% less current to start and has a very stable arc.
PURE Tungsten Color Coded GREEN, are best suited for AC Tig welding applications.
Pure Tungsten, Green, AWS Class EWP, AC welding applications. Least expensive of all electrodes. Applications: aluminum and magnesium alloys.
THORIATED Tungsten Color Code RED, YELLOW, MAUVE or ORANGE, is best suited for DC Tig welding applications.
2% Thoriated, Red, AWS Class EWTH-2, DC welding applications. The most common type of electrode used today. Applications: carbon & stainless steel, nickel alloys and titanium.
Grinding tip shapes
Do not grind the end with the color band!
We have the following stock of filler rods
- Stainless steel
A 63A plug and socket connection is used, with a pushbutton on/off control station and no-volt release.
RFID control of access will be installed shortly.
Tig welding tips
Random collection of useful links