Miller Weldcraft TIG breakdown

Miller WP-9 / Weldcraft A-125 TIG Parts Breakdown

Use this WP-9 / A-125 breakdown to identify torch body parts, cups, collets, gas lenses, back caps, and common wear items.

Torch family

WP-9 / Weldcraft A-125 air-cooled TIG torch path.

Consumable system

9/20 style cups, collets, collet bodies, gas lenses, large-diameter gas lenses, and back caps.

Fitment risk

Do not mix WP-9/WP-20 consumables with WP-17/WP-26 front-end parts.

Part number lookup

Parts List

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Item # Part # Description Qty Buy
Torch body WP-9
Weldcraft A-125 torch body, formerly WP-9
torch body Air-cooled A-125 / WP-9 path.
Amazon link: Needs verification.
Torch body WP-9V
Weldcraft A-125 valve torch body, formerly WP-9V
torch body Confirm valve body before ordering.
Amazon link: Needs verification.
Torch body WP-9F
Weldcraft A-125 flex torch body, formerly WP-9F
torch body Confirm flex head before ordering.
Amazon link: Needs verification.
Torch body WP-9FV
Weldcraft A-125 flex valve torch body, formerly WP-9FV
torch body Confirm flex head and valve body.
Amazon link: Needs verification.
Handle H-100R
Ribbed handle for A-125 / WP-9 package
handle
Amazon link: Needs verification.
Handle H-100
Smooth handle for valve-body package
handle
Amazon link: Needs verification.
Valve VS-2
Valve used on WP-9V / WP-9FV valve torch bodies
valve
Amazon link: Needs verification.
Tool 53N20
Collet body wrench
tool
Amazon link: Needs verification.
1 598882
Insulator for WP-9 / WP-20 non-gas lens and gas lens setups
insulator Used across the 9/20 consumable chart.
Amazon link: Needs verification.
2 13N20
WP-9 / WP-20 collet - .020 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 13N21
WP-9 / WP-20 collet - .040 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 13N22
WP-9 / WP-20 collet - 1/16 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 13N23
WP-9 / WP-20 collet - 3/32 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 13N24
WP-9 / WP-20 collet - 1/8 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
3 13N25
WP-9 / WP-20 collet body - .020 in.
collet body Use with non-gas-lens setup.
Amazon link: Needs verification.
3 13N26
WP-9 / WP-20 collet body - .040 in.
collet body Use with non-gas-lens setup.
Amazon link: Needs verification.
3 13N27
WP-9 / WP-20 collet body - 1/16 in.
collet body Use with non-gas-lens setup.
Amazon link: Needs verification.
3 13N28
WP-9 / WP-20 collet body - 3/32 in.
collet body Use with non-gas-lens setup.
Amazon link: Needs verification.
3 13N29
WP-9 / WP-20 collet body - 1/8 in.
collet body Use with non-gas-lens setup.
Amazon link: Needs verification.
4 13N08
WP-9 / WP-20 alumina cup - #4 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 13N09
WP-9 / WP-20 alumina cup - #5 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 13N10
WP-9 / WP-20 alumina cup - #6 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 13N11
WP-9 / WP-20 alumina cup - #7 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 13N12
WP-9 / WP-20 alumina cup - #8 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 13N13
WP-9 / WP-20 alumina cup - #10 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
5 45V41
WP-9 / WP-20 gas lens - .020 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
5 45V42
WP-9 / WP-20 gas lens - .040 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
5 45V43
WP-9 / WP-20 gas lens - 1/16 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
5 45V44
WP-9 / WP-20 gas lens - 3/32 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
5 45V45
WP-9 / WP-20 gas lens - 1/8 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 53N58
WP-9 / WP-20 alumina gas lens cup - #4
cup Use with gas lens setup only.
Amazon link: Needs verification.
6 53N59
WP-9 / WP-20 alumina gas lens cup - #5
cup Use with gas lens setup only.
Amazon link: Needs verification.
6 53N60
WP-9 / WP-20 alumina gas lens cup - #6
cup Use with gas lens setup only.
Amazon link: Needs verification.
6 53N61
WP-9 / WP-20 alumina gas lens cup - #7
cup Use with gas lens setup only.
Amazon link: Needs verification.
6 53N61S
WP-9 / WP-20 alumina gas lens cup - #8 short
cup Use with gas lens setup only.
Amazon link: Needs verification.
7-10 54N63-20
WP-9 / WP-20 large-diameter gas lens part - large-diameter gas lens insulator
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 13N20L
WP-9 / WP-20 large-diameter gas lens part - .020 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 13N21L
WP-9 / WP-20 large-diameter gas lens part - .040 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 13N22L
WP-9 / WP-20 large-diameter gas lens part - 1/16 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 13N23L
WP-9 / WP-20 large-diameter gas lens part - 3/32 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 13N24L
WP-9 / WP-20 large-diameter gas lens part - 1/8 in. large-diameter collet
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 45V0204S
WP-9 / WP-20 large-diameter gas lens part - .020/.040 large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 45V116S
WP-9 / WP-20 large-diameter gas lens part - 1/16 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 45V64S
WP-9 / WP-20 large-diameter gas lens part - 3/32 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
7-10 995795S
WP-9 / WP-20 large-diameter gas lens part - 1/8 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
11-13 41V33
WP-9 / WP-20 back cap - short back cap
back cap Choose by clearance and tungsten length.
Amazon link: Needs verification.
11-13 41V35
WP-9 / WP-20 back cap - medium back cap
back cap Choose by clearance and tungsten length.
Amazon link: Needs verification.
11-13 41V24
WP-9 / WP-20 back cap - long back cap
back cap Choose by clearance and tungsten length.
Amazon link: Needs verification.

Replace first

Common Wear Guidance

1. Inspect the cup

Cracked or contaminated cups are the fastest visual check when gas coverage is poor.

2. Match collet to tungsten

Loose tungsten usually points to the wrong collet size or a worn collet before the whole torch is bad.

3. Verify gas lens or collet body

If the arc is unstable or gas coverage is poor, confirm the front-end style before buying parts.

Verify fitment

Check Before Ordering

Verify torch body

Confirm WP-9, WP-9V, WP-9F, or WP-9FV before ordering handles or valve parts.

Verify front-end style

Standard, gas lens, and large-diameter gas lens setups require different parts.

Amazon status

Amazon links are optional buying references only. Unverified matches stay blocked.

Related consumables

WP-20 / W-250 Breakdown

Shares the 9/20 consumable chart with a water-cooled torch path.

Open support

WP-17 / A-150 Breakdown

Use for 17/18/26-style front-end parts.

Open support

Miller TIG Support

Open Miller TIG machine and torch support.

Open support
Need More Help? Troubleshooting, FAQs, and deeper TIG setup notes

TIG unstable arc

Inspect tungsten contamination, collet tightness, gas coverage, and work connection first.

Open troubleshooting

TIG torch overheating

Verify amperage range, cooling flow on water-cooled torches, and front-end fitment.

Open troubleshooting

TIG gas coverage

Cup size, gas lens seating, flow rate, and drafts are the common checks.

Open TIG support