Miller Weldcraft TIG breakdown

Miller WP-17 / Weldcraft A-150 TIG Parts Breakdown

Use this WP-17 / A-150 breakdown to identify torch body parts, cups, collets, gas lenses, back caps, and common wear items.

Torch family

WP-17 / Weldcraft A-150 air-cooled TIG torch path.

Consumable system

17/18/26 style cups, collets, collet bodies, gas lenses, stubby parts, and back caps.

Fitment risk

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

Part number lookup

Parts List

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Item # Part # Description Qty Buy
Torch body WP-17
Weldcraft A-150 torch body, formerly WP-17
torch body Air-cooled A-150 / WP-17 path.
Amazon link: Needs verification.
Torch body WP-17V
Weldcraft A-150 valve torch body, formerly WP-17V
torch body Confirm valve body before ordering.
Amazon link: Needs verification.
Torch body WP-17F
Weldcraft A-150 flex torch body, formerly WP-17F
torch body Confirm flex head before ordering.
Amazon link: Needs verification.
Torch body WP-17FV
Weldcraft A-150 flex valve torch body, formerly WP-17FV
torch body Confirm flex head and valve body.
Amazon link: Needs verification.
Handle H-100R
Ribbed handle for A-150 / WP-17 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-17V / WP-17FV valve torch bodies
valve
Amazon link: Needs verification.
1 18CG
Insulator for WP-17 / WP-26 non-gas lens setup
insulator Required for standard non-gas-lens front end.
Amazon link: Needs verification.
5 54N01
Insulator for WP-17 / WP-26 gas lens setup
insulator Required for gas lens front end.
Amazon link: Needs verification.
8 54N63
Large-diameter gas lens insulator
insulator Use with large-diameter gas lens parts.
Amazon link: Needs verification.
11 18CG20
Stubby non-gas lens insulator
insulator Use with stubby front-end setup.
Amazon link: Needs verification.
15 17GLG20
Stubby gas lens insulator
insulator Use with stubby gas lens setup.
Amazon link: Needs verification.
2 10N21
WP-17 / WP-26 collet - .020 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 10N22
WP-17 / WP-26 collet - .040 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 10N23
WP-17 / WP-26 collet - 1/16 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 10N24
WP-17 / WP-26 collet - 3/32 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 10N25
WP-17 / WP-26 collet - 1/8 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
2 54N20
WP-17 / WP-26 collet - 5/32 in.
collet Match tungsten diameter.
Amazon link: Needs verification.
3 406488
WP-17 / WP-26 collet body - 5/32 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
3 10N29
WP-17 / WP-26 collet body - .020 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
3 10N30
WP-17 / WP-26 collet body - .040 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
3 10N31
WP-17 / WP-26 collet body - 1/16 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
3 10N32
WP-17 / WP-26 collet body - 3/32 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
3 10N28
WP-17 / WP-26 collet body - 1/8 in.
collet body Use with standard non-gas-lens setup.
Amazon link: Needs verification.
4 10N50
WP-17 / WP-26 alumina cup - #4 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N49
WP-17 / WP-26 alumina cup - #5 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N48
WP-17 / WP-26 alumina cup - #6 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N47
WP-17 / WP-26 alumina cup - #7 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N46
WP-17 / WP-26 alumina cup - #8 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N45
WP-17 / WP-26 alumina cup - #10 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
4 10N44
WP-17 / WP-26 alumina cup - #12 alumina cup
cup Verify nozzle size and torch front end.
Amazon link: Needs verification.
6 45V29
WP-17 / WP-26 gas lens - .020 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 45V24
WP-17 / WP-26 gas lens - .040 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 45V25
WP-17 / WP-26 gas lens - 1/16 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 45V26
WP-17 / WP-26 gas lens - 3/32 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 45V27
WP-17 / WP-26 gas lens - 1/8 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
6 45V28
WP-17 / WP-26 gas lens - 5/32 in.
gas lens Use with gas lens cups and correct insulator.
Amazon link: Needs verification.
7 54N18
WP-17 / WP-26 alumina gas lens cup - #4
cup Use with gas lens setup only.
Amazon link: Needs verification.
7 54N17
WP-17 / WP-26 alumina gas lens cup - #5
cup Use with gas lens setup only.
Amazon link: Needs verification.
7 54N16
WP-17 / WP-26 alumina gas lens cup - #6
cup Use with gas lens setup only.
Amazon link: Needs verification.
7 54N15
WP-17 / WP-26 alumina gas lens cup - #7
cup Use with gas lens setup only.
Amazon link: Needs verification.
7 54N14
WP-17 / WP-26 alumina gas lens cup - #8
cup Use with gas lens setup only.
Amazon link: Needs verification.
7 54N19
WP-17 / WP-26 alumina gas lens cup - short
cup Use with gas lens setup only.
Amazon link: Needs verification.
9 995795
WP-17 / WP-26 large-diameter gas lens - 1/8 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
9 45V0204
WP-17 / WP-26 large-diameter gas lens - .020/.040 large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
9 45V116
WP-17 / WP-26 large-diameter gas lens - 1/16 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
9 45V64
WP-17 / WP-26 large-diameter gas lens - 3/32 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
9 45V63
WP-17 / WP-26 large-diameter gas lens - 5/32 in. large gas lens
large gas lens Do not mix with standard gas lens parts.
Amazon link: Needs verification.
10 57N75
WP-17 / WP-26 large-diameter gas lens cup - #6 large-diameter cup
cup Use with large-diameter gas lens setup.
Amazon link: Needs verification.
10 57N74
WP-17 / WP-26 large-diameter gas lens cup - #8 large-diameter cup
cup Use with large-diameter gas lens setup.
Amazon link: Needs verification.
10 53N88
WP-17 / WP-26 large-diameter gas lens cup - #10 large-diameter cup
cup Use with large-diameter gas lens setup.
Amazon link: Needs verification.
10 53N87
WP-17 / WP-26 large-diameter gas lens cup - #12 large-diameter cup
cup Use with large-diameter gas lens setup.
Amazon link: Needs verification.
10 53N89
WP-17 / WP-26 large-diameter gas lens cup - short large-diameter cup
cup Use with large-diameter gas lens setup.
Amazon link: Needs verification.
12-17 10N22S
WP-17 / WP-26 stubby consumable - .040 in. stubby collet
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 10N23S
WP-17 / WP-26 stubby consumable - 1/16 in. stubby collet
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 10N24S
WP-17 / WP-26 stubby consumable - 3/32 in. stubby collet
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 10N25S
WP-17 / WP-26 stubby consumable - 1/8 in. stubby collet
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 17CB20
WP-17 / WP-26 stubby consumable - stubby collet body
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 17GL040
WP-17 / WP-26 stubby consumable - .040 in. stubby gas lens
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 17GL116
WP-17 / WP-26 stubby consumable - 1/16 in. stubby gas lens
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 17GL332
WP-17 / WP-26 stubby consumable - 3/32 in. stubby gas lens
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
12-17 17GL18
WP-17 / WP-26 stubby consumable - 1/8 in. stubby gas lens
stubby front end Use only when stubby setup is confirmed.
Amazon link: Needs verification.
18-20 57Y04
WP-17 / WP-26 back cap - short back cap
back cap Choose by clearance and tungsten length.
Amazon link: Needs verification.
18-20 300M
WP-17 / WP-26 back cap - medium back cap
back cap Choose by clearance and tungsten length.
Amazon link: Needs verification.
18-20 57Y02
WP-17 / WP-26 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-17, WP-17V, WP-17F, or WP-17FV before ordering handles or valve parts.

Verify cup system

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

Amazon status

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

Related consumables

WP-26 / A-200 Breakdown

Shares the 17/18/26 consumable chart with a heavier air-cooled torch path.

Open support

WP-9 / A-125 Breakdown

Use for 9/20-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