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.

WP9 TIG Torch

Use this page to confirm the WP9 / Weldcraft A-125 air-cooled torch path, then use the diagram and parts table below.

Compatible Machines

Most Common Replacement Parts

Common Consumables

Breakdown Diagram

Need More Help?

For unstable arc or poor gas coverage, inspect tungsten condition, cup damage, collet grip, gas lens seating, and shielding gas flow before replacing the torch body.

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.
View on Amazon
Torch body WP-9V
Weldcraft A-125 valve torch body, formerly WP-9V
torch body Confirm valve body before ordering.
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Torch body WP-9F
Weldcraft A-125 flex torch body, formerly WP-9F
torch body Confirm flex head before ordering.
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Torch body WP-9FV
Weldcraft A-125 flex valve torch body, formerly WP-9FV
torch body Confirm flex head and valve body.
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Handle H-100R
Ribbed handle for A-125 / WP-9 package
handle
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Handle H-100
Smooth handle for valve-body package
handle
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Valve VS-2
Valve used on WP-9V / WP-9FV valve torch bodies
valve
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Tool 53N20
Collet body wrench
tool
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1 598882
Insulator for WP-9 / WP-20 non-gas lens and gas lens setups
insulator Used across the 9/20 consumable chart.
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2 13N20
WP-9 / WP-20 collet - .020 in.
collet Match tungsten diameter.
Not currently available on Amazon.
2 13N21
WP-9 / WP-20 collet - .040 in.
collet Match tungsten diameter.
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2 13N22
WP-9 / WP-20 collet - 1/16 in.
collet Match tungsten diameter.
Not currently available on Amazon.
2 13N23
WP-9 / WP-20 collet - 3/32 in.
collet Match tungsten diameter.
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2 13N24
WP-9 / WP-20 collet - 1/8 in.
collet Match tungsten diameter.
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3 13N25
WP-9 / WP-20 collet body - .020 in.
collet body Use with non-gas-lens setup.
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3 13N26
WP-9 / WP-20 collet body - .040 in.
collet body Use with non-gas-lens setup.
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3 13N27
WP-9 / WP-20 collet body - 1/16 in.
collet body Use with non-gas-lens setup.
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3 13N28
WP-9 / WP-20 collet body - 3/32 in.
collet body Use with non-gas-lens setup.
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3 13N29
WP-9 / WP-20 collet body - 1/8 in.
collet body Use with non-gas-lens setup.
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4 13N08
WP-9 / WP-20 alumina cup - #4 alumina cup
cup Verify nozzle size and torch front end.
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4 13N09
WP-9 / WP-20 alumina cup - #5 alumina cup
cup Verify nozzle size and torch front end.
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4 13N10
WP-9 / WP-20 alumina cup - #6 alumina cup
cup Verify nozzle size and torch front end.
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4 13N11
WP-9 / WP-20 alumina cup - #7 alumina cup
cup Verify nozzle size and torch front end.
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4 13N12
WP-9 / WP-20 alumina cup - #8 alumina cup
cup Verify nozzle size and torch front end.
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4 13N13
WP-9 / WP-20 alumina cup - #10 alumina cup
cup Verify nozzle size and torch front end.
Not currently available on Amazon.
5 45V41
WP-9 / WP-20 gas lens - .020 in.
gas lens Use with gas lens cups and correct insulator.
Not currently available on Amazon.
5 45V42
WP-9 / WP-20 gas lens - .040 in.
gas lens Use with gas lens cups and correct insulator.
Not currently available on Amazon.
5 45V43
WP-9 / WP-20 gas lens - 1/16 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V44
WP-9 / WP-20 gas lens - 3/32 in.
gas lens Use with gas lens cups and correct insulator.
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5 45V45
WP-9 / WP-20 gas lens - 1/8 in.
gas lens Use with gas lens cups and correct insulator.
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6 53N58
WP-9 / WP-20 alumina gas lens cup - #4
cup Use with gas lens setup only.
Not currently available on Amazon.
6 53N59
WP-9 / WP-20 alumina gas lens cup - #5
cup Use with gas lens setup only.
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6 53N60
WP-9 / WP-20 alumina gas lens cup - #6
cup Use with gas lens setup only.
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6 53N61
WP-9 / WP-20 alumina gas lens cup - #7
cup Use with gas lens setup only.
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6 53N61S
WP-9 / WP-20 alumina gas lens cup - #8 short
cup Use with gas lens setup only.
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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.
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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.
Not currently available on Amazon.
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.
Not currently available on Amazon.
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.
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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.
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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.
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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.
Not currently available on Amazon.
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.
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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.
Not currently available on Amazon.
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.
Not currently available on Amazon.
11-13 41V33
WP-9 / WP-20 back cap - short back cap
back cap Choose by clearance and tungsten length.
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11-13 41V35
WP-9 / WP-20 back cap - medium back cap
back cap Choose by clearance and tungsten length.
Not currently available on Amazon.
11-13 41V24
WP-9 / WP-20 back cap - long back cap
back cap Choose by clearance and tungsten length.
View on Amazon

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.

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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