Miller TIG support
Miller WP-20 / Weldcraft W-250 TIG Torch Support
Water-cooled TIG torch path for Syncrowave and Dynasty packages that need cooler support.
Start with the torch body
Identify the torch
WP-20, W-250
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 / 7 | Insulators | Required insulator changes by standard, gas lens, or large-diameter gas lens setup. | 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 follows the nozzle-size row in the diagram table. | Search parts |
| 11 | O-ring | Used where the diagram calls out the 98W77 O-ring. | Search parts |
| 12 / 13 | Back caps | Medium and long back-cap options shown at the bottom of the diagram. | Search parts |
Common replacement groups
| Replacement group | What to verify | Support path |
|---|---|---|
| 20-series cups | Match WP-20, tungsten diameter, cup size, and water-cooled setup before ordering. | Open TIG consumables |
| 20-series collets | Match WP-20, tungsten diameter, cup size, and water-cooled setup before ordering. | Open TIG consumables |
| 20-series collet bodies | Match WP-20, tungsten diameter, cup size, and water-cooled setup before ordering. | Open TIG consumables |
| 20-series gas lenses | Match WP-20, tungsten diameter, cup size, and water-cooled setup before ordering. | Open TIG consumables |
| back caps | Match WP-20, tungsten diameter, cup size, and water-cooled setup before ordering. | Open TIG consumables |
| coolant path checks | Match WP-20, tungsten diameter, cup size, and water-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.
Maxstar 210 STR
DC TIG/stick STR model with Auto-Line 120-480 V input, Lift-Arc TIG, dual schedule stick, DIG, Hot Start, Stick-Stuck, and 50 mm Dinse-style connectors.
Syncrowave 212
AC/DC TIG, stick
Syncrowave 300 and 400
Industrial AC/DC TIG and stick platform. Syncrowave 300 supports 5-300 A TIG and 5-230 A stick; Syncrowave 400 supports 5-400 A TIG and 5-300 A stick with 208/240/480 V or 600 V single- or three-phase input and machine-only, TIGRunner, wired Complete, and wireless Complete packages.
Maxstar 210 Series
DC TIG/stick series covering Maxstar 210 Base and Maxstar 210 DX. Supports Auto-Line 120-480 V input, HF or Lift-Arc TIG on Base/DX models, pulsed TIG except STR, and air-cooled or externally powered Coolmate 1.3 water-cooled package builds.
Maxstar 280 Series
DC TIG/stick series covering Maxstar 280 Base, CPS, DX, DX CPS, and TIGRunner packages. Supports Auto-Line 208-575 V input, 1-280 A TIG, 5-280 A stick, air carbon arc, CPS/Cooler Power Supply models, and water-cooled package builds with W-280 or W-375 torch options.
Dynasty 210 Series
AC/DC TIG and stick series covering Dynasty 210 machine-only, CPS, CE, TIGRunner, and Complete packages. Supports 120-480 V Auto-Line input, pulsed TIG, advanced AC waveforms, CPS cooler control on CPS models, and W-250 or W-280 water-cooled package paths.
Dynasty 300 Series
AC/DC TIG and stick series covering Dynasty 300 machine-only, CE, TIGRunner, CE TIGRunner, and Complete packages. Supports 208-600 V Auto-Line input, 1-300 A DC TIG, 2-300 A AC TIG, 5-300 A stick, air carbon arc, Coolmate 1.3 package builds, and W-280 or W-375 torch paths.
Maxstar 400
Heavy industrial DC TIG/stick power source with pulsed TIG, carbon arc gouging, 7-inch LCD controls, Auto-Line 208-600 V input, integrated cooler power, and water-cooled TIGRunner package paths.
Dynasty 400
Heavy industrial 400 amp AC/DC TIG and stick power source with 7-inch LCD controls, Auto-Line 208-600 V input, Coolmate 3.5/CPS support, water-cooled TIGRunner, and W-375 Complete package path.
Dynasty 800
Heavy industrial 800 amp AC/DC TIG and stick power source with Auto-Line 208-600 V input, Coolmate 3.5/CPS support, thread-lock connector package path, and W-400 Complete package path.
What to check first
Torch overheating
Verify cooling system on water-cooled setups. Inspect torch cable and handle heat. Check amperage against torch class. Verify front-end consumable fitment.
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.