Closed Weld Head


The TPWH-C series is designed to perform orbtial TIG welds on tube and thin wall pipe without the need for wire feeding. 
The sealed cavity is filled with protective gas prior to and during the welding process.  This weld head is very efficient and has a water cooled system. Various collet sizes are available, offering accurate positioning without tacking.

• TIG autogenous (fusion) welding without filler material
• Precision design for accurate tube positioning 
• Tube clamping collets manufactured from 17-4 SS for repeatability 
• Closed chamber for better gas coverage and cleaner welds
• Compact design for small work areas
• Commonly used for stainless steel, nickel alloys and titanium
• Water cooled head for high production and larger wall thickness
• The tool of choice for medical, food, biological, electric, instrument and
   pipe installation industries
• Recommended Power Unit = OW-ARC 180

TC-ARC-1 (AMI) After Market Closed Weld Head (1″, 2″ & 4″)

Plugs directly into AMI Power Sources, no cable adapter needed.  Optional adapter available for AMI collets, easy clamping system.

Note: This weld head is specifically designed for AMI equipment.

• Plugs directly into AMI Power Unit • No cable adapter needed • Easy clamping system for adjusting and tightening collets • Size range is 1/4″ to 4” • Various sized collets available • Optional adapter available if using AMI collets (see page 42) • Optional 1″ head holder available • Heavy duty, more robust design • Water cooled

Diameter Range mm (inches)6-25.4mm (.25″-1″)
Welding Speed (rpm)0.61-12.2
Weight kg (lbs)2.5kg (5.5lbs)
Standard Cable Length10m (32′)
Cooling Water
Dimensions (mm)337x96x50
Dimensions (inches)13.25″x3.78″x1.97″
Diameter Range mm (inches)38.1-101.6 (1.5”-4”)
Welding Speed (rpm)0.095-1.9
Weight kg (lbs)6kg (13lbs) without cable
Standard Cable Length10m (32)
Cooling Water
Dimensions (mm)498x195x56
Dimensions (inches)19.5″x7.5″x2″

Note: Contact us regarding details on our TC-ARC-2 Model.

TPWH-C-5-M (0.125″ Closed Chamber) Micro
C-5-M-125 .125″ Collet for TPWH-C-5-M
C-5-M-25 .25″ Collet for TPWH-C-5-M
C-5-M-375 .375″ Collet for TPWH-C-5-M
C-5-M-5 .5″ Collet for TPWH-C-5-M
TPWH-C-5 (0.125″ Closed Chamber) 
C-5-125 .125″ Collet for TPWH-C-.5
C-5-25 .25″ Collet for TPWH-C-.5
C-5-375 .375″ Collet for TPWH-C-.5
C-5-5 .5″ Collet for TPWH-C-.5
TPWH-C-1 (1″ Closed Chamber) 
C-1-25 .25″ Collet for TPWH-C-1
C-1-375 .375″ Collet for TPWH-C-1
C-1-5 .5″ Collet for TPWH-C-1
C-1-5P .5P” Collet for TPWH-C-1
C-1-625 .625″ Collet for TPWH-C-1
C-1-75 .75″ Collet for TPWH-C-1
C-1-75P .75P” Collet for TPWH-C-1
C-1-1 1″ Collet for TPWH-C-1
TPWH-C-1.5 (1.5″ Closed Chamber)
C-1.5-25 .25″ Collet for TPWH-C-1.5
C-1.5-375 .375″ Collet for TPWH-C-1.5
C-1.5-5 .5″ Collet for TPWH-C-1.5
C-1.5-5P .5P” Collet for TPWH-C-1.5
C-1.5-625 .625″ Collet for TPWH-C-1.5
C-1.5-75 .75″ Collet for TPWH-C-1.5
C-1.5-75P .75P” Collet for TPWH-C-1.5
C-1.5-1 1″ Collet for TPWH-C-1.0
C-1.5-1P 1P” Collet for TPWH-C-1.5
C-1.5-1.5 1.5″ Collet for TPWH-C-1.5
TPWH-C-3 (3″ Closed Chamber)
C-3-75 3/4″ Collet for TPWH-C-3 Head.
C-3-75P 3/4P” Collet for TPWH-C-3 Head
C-3-1 1″ Collet for TPWH-C-3 Head.
C-3-1P 1″P Collet for TPWH-C-3 Head.
C-3-1.5 1.5″ Collet for TPWH-C-3 Head.
C-3-1.5P 3/4P” Collet for TPWH-C-3 Head
C-3-2 2″ Collet for TPWH-C-3 Head.
C-3-2P 2P” Collet for TPWH-C-3 Head
C-3-2.5 2.5″ Collet for TPWH-C-3 Head.
C-3-2.5P 2.5P Collet for TPWH-C-3 Head.
C-3-3 3″ Collet for TPWH-C-3 Head.
TPWH-C-4 (4″ Closed Chamber) 
C-4-1 1″ Collet for TPWH-C-4
C-4-1.5 1.5″ Collet for TPWH-C-4
C-4-1.5P 1.5P” Collet for TPWH-C-4
C-4-2 2″ Collet for TPWH-C-4
C-4-2P 2P” Collet for TPWH-C-4
C-4-2.5 2.5″ Collet for TPWH-C-4  
C-4-2.5P 2.5P” Collet for TPWH-C-4
C-4-3 3″ Collet for TPWH-C-4  
C-4-3.5 3.5″ Collet (3″ Pipe) for TPWH-C-4
C-4-4 4P” Collet (3.5″ Pipe) for TPWH-C-4
TPWH-C-6 (6″ Closed Chamber)
C-6-2 2″ Collet for TPWH-C-6 Head
C-6-2P 2″ Collet for TPWH-C-6 Head
C-6-2.5 2.5″ Collet for TPWH-C-6 Head
C-6-2.5P 2.5P” Collet for TPWH-C-6 Head
C-6-3 3″ Collet for TPWH-C-6 Head
C-6-3.5 3.5″ Collet (3″ Pipe) for TPWH-C-6 Head
C-6-4 4″ Collet (3.5″ Pipe) for TPWH-C-6 Head
C-6-4.5 4.5″ Collet (4″ Pipe) for TPWH-C-6 Head
C-6-6 6″ Collet for TPWH-C-6 Head
C-6-6P 6P” Collet for TPWH-C-6 Head