TIG Parts Explained | What goes where on a TIG welding torch

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If TIG welding is not something you do all day every day, making sense of torch parts can be a challenge. In this article, we give you a breakdown diagram to show what goes where, with further details on each part in the table below.

While the parts shown suit #17, #18 & #26 series TIG torches (which are the most widely used and commonly available), the general structure of all TIG torches is similiar.

For further helpful content, see also:
Weldclass TIG Torches & Spares Catalogue (pdf download)
The TIG Welding Process - your questions answered

 

TIG Torch Parts Breakdown

Refer to table below for description & purpose of each part, and links to more information.

 

 

Weldclass Parts to suit 17/18/26 TIG Torches 

Click on any image to view more information.

Ref

Item / Purpose

Size / Details

Click on image for more info ↓

Part No

T

Tungsten Electrode
Conducts welding current & creates the arc 

Handy Pack 1.6+2.4mm

WC-06509

3.2mm "All Metal" Pk10

WC-05194

A

Back Cap
Shields back of tungsten electrode

Long Pk2

WC-57Y02P

Medium Pk2

WC-57Y05P

Short Pk2

WC-57Y04P

B

Torch Body
Receptacle for & conducts current and gas to consumable parts

17F Flexi no valve

P3-TB17F

17FV Flexi with valve

P3-TB17FV

26F Flexi no valve

P3-TB26F

26FV Flexi with valve

P3-TB26FV

C1

Collet Std
Grips tungsten electrode

1.6mm Pk2

P3-10N23

2.4mm Pk2

P3-10N24

3.2mm Pk2

P3-10N25

C2

Wedge* Collet Std
Grips tungsten electrode

1.6mm Pk2

WC-01843

2.4mm Pk2

WC-01844

3.2mm Pk2

WC-01845

C3

Wedge* Collet Stubby
Grips tungsten electrode

1.6mm Pk2

WC-01840

2.4mm Pk2

WC-01841

3.2mm Pk2

WC-01842

*Wedge collets provide reliable clamping of the tungsten vs standard ‘split’ collets that are prone to twisting when subject to heat / prolonged use

D1

Gasket
Provides gas-tight seal

For gas lens Pk2

 

WC-54N01P

D2

PX Std Pk1

 

WC-01839

D3

PX Large Pk1

 

WC-01849

E1

Collet Body Std
Clamps against collet & directs gas though the cup

1.6mm Pk2

 

P3-10N31

2.4mm Pk2

P3-10N32

3.2mm Pk2

P3-10N28

E2

Collet Body / Gas Lens*
Clamps against collet & directs gas through cup

1.6mm Pk2

 

WC-45V25P

2.4mm Pk2

WC-45V26P

3.2mm Pk2

WC-45V27P

E3

Collet Body / Diffuser Holder
Seals top of, & directs gas through glass cup

PX Std Pk1

 

WC-01846

E4

PX Large Pk1

 

WC-01847

F1

 

 

Diffuser / Gas Lens*
Clamps against collet & 'filters' gas for uniform & smooth flow

 

 

PX Std 1.6mm Pk1

 

WC-01833

PX Std 2.4mm Pk1

WC-01834

PX Std 3.2mm Pk1

WC-01835

PX Large 1.6mm Pk1

 

WC-01836

PX Large 2.4mm Pk1

WC-01837

PX Large 3.2mm Pk1

WC-01838

*Gas lens parts incorporate a fine mesh gas filter for low-turbulence & smooth, linear gas flow to improve weld quality and allow longer tungsten stick-out

G1

Ceramic Cup Std
Directs gas to the weld pool

#05 7.9mm Pk2

 

P3-10N49

#06 9.5mm Pk2

P3-10N48

#07 11.1mm Pk2

P3-10N47

#08 12.7mm Pk2

P3-10N46

#10 15.8mm Pk2

P3-10N45

G2

Ceramic Cup
For gas lens
Directs gas to the weld pool

#6 9.5mm Pk2

 

WC-54N16P

#7 11mm Pk2

WC-54N15P

#8 12.7mm Pk2

WC-54N14P

G3

Glass Cup
Directs gas to,  & illuminates / enhances view of, the weld pool

PX Std Ø14mm Pk1

 

WC-01831

G4

PX Large Ø29mm Pk1

 

WC-01832

Parts Kit 
Suits all 17/18/26 series TIG torches

Standard

WC-01660

 

 

 

 

 

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