Miller TIG support
Miller WP-9 / Weldcraft A-125 TIG Torch Support
Compact air-cooled TIG torch path for light-duty work and tight access.
Start with the torch body
Identify the torch
WP-9, A-125
Use the breakdown
Match the diagram number, tungsten diameter, cup size, and gas lens or standard setup before ordering.
Then choose consumables
Cups, collets, gas lenses, collet bodies, back caps, and tungsten are series-specific.
Parts breakdown
Use the numbered diagram first, then match the part-number table in the image by tungsten diameter, cup size, and standard or gas lens setup.
Clickable breakdown key
Use this table to jump from the diagram number to the right part family. The diagram image above carries the detailed part-number matrix.
| Diagram number | Part family | What to verify | Lookup path |
|---|---|---|---|
| 1 | Insulator | Required front-end insulator for standard and gas lens setups. | Search parts |
| 2 / 8 | Collets | Match tungsten diameter before choosing the collet. | Search parts |
| 3 / 5 / 9 | Collet body or gas lens | Choose standard, gas lens, or large-diameter gas lens setup. | Search parts |
| 4 / 6 / 10 | Cup / nozzle | Cup size changes with the gas lens and nozzle size shown in the diagram table. | Search parts |
| 11 | O-ring | Used where the diagram calls out the large-diameter gas lens O-ring. | Search parts |
| 12 / 13 | Back caps | Short and long back-cap options shown at the bottom of the diagram. | Search parts |
Common replacement groups
| Replacement group | What to verify | Support path |
|---|---|---|
| 9-series cups | Match WP-9, tungsten diameter, cup size, and air-cooled setup before ordering. | Open TIG consumables |
| 9-series collets | Match WP-9, tungsten diameter, cup size, and air-cooled setup before ordering. | Open TIG consumables |
| 9-series collet bodies | Match WP-9, tungsten diameter, cup size, and air-cooled setup before ordering. | Open TIG consumables |
| small back caps | Match WP-9, tungsten diameter, cup size, and air-cooled setup before ordering. | Open TIG consumables |
| 1/16 in. and smaller tungsten paths | Match WP-9, tungsten diameter, cup size, and air-cooled setup before ordering. | Open TIG consumables |
Verify torch series before ordering
TIG front-end parts are not universal. Match the torch series, tungsten diameter, gas lens or standard setup, and cooling requirement before ordering. Amazon links remain optional buying references only and are not used as compatibility truth.
Related TIG support
Machine fitment and troubleshooting
Machine families to check
Maxstar 161 STL and STH
Portable DC TIG/stick package. STL uses Lift-Arc starting; STH adds high frequency, Lift-Arc, and built-in pulsing.
What to check first
Unstable arc
Inspect tungsten contamination first. Verify collet tightness. Inspect cup or gas lens seating. Verify shielding gas flow.
Poor gas coverage
Inspect cup condition. Verify gas lens seating. Check flow rate. Inspect hose or fitting leaks.
Tungsten splitting
Verify polarity. Verify amperage. Inspect shielding gas coverage. Confirm tungsten type and diameter.