Otto Arc Systems, Inc. Weld Heads

TPWH-OA (with AVC and OSC 3", 5", 7", 9" and 12")

Otto Arc Systems, Inc. Weld Heads

Technical Specs (pdf)

TPWH-OA-5 Operating Manual (pdf)

TPWH-OA-7 Operating Manual (pdf)

TPWH-OA-9 Operating Manual (pdf)

The TPWH-OA Series is designed for TIG welding on tube to tube, pipe to pipe and pipe fittings and is suitable for carbon and stainless steel. The TPWH-OA Series is used for applications that require AVC/OSC. Welds tubing and pipe for industries such as chemical, food, medicine, boilers, military, and nuclear industries.

  • Commonly used for medium to thick wall stainless and carbon steel material and other pipe alloys
  • Used for pipe to pipe, tube to tube, butt welds, flange welds, elbows, valves etc.
  • Arc voltage control (AVC) and oscillation control (OSC) for multi-pass welding procedures
  • Automatic all position TIG welding for tube and pipe welding with or without wire feed
  • Compact design for limited radial and axial clearances / can perform up to 1" wall thickness
  • Water cooled and highly durable torch design
  • Recommended Power Unit = OW-ARC 250
  TPWH-OA-3 TPWH-OA-5 TPWH-OA-7 TPWH-OA-9 TPWH-OA-12
Tube OD Inner Clamp:
19.05 - 45 mm
(.75" - 1.75")
Inner Clamp:
38.1 - 76 mm
(1.5" - 3")
Inner Clamp:
50.8 - 114.3 mm
(2" - 4.5")
Inner Clamp:
120 - 178 mm
(4.5" - 7")
Inner Clamp:
150 - 230 mm
(6" - 9")
Outer Clamp:
45 - 77 mm
(1.75" - 3")
Outer Clamp:
76 - 130 mm
(3" - 5")
Outer Clamp:
114.3 - 180 mm
(4.5" - 7")
Outer Clamp:
178 - 230 mm
(7" - 9")
Outer Clamp:
230 - 324 mm
(9" - 12.75")
Tungsten Diameter 2.4, 3.2 mm (3/32", 1/8") 2.4, 3.2 mm (3/32", 1/8") 2.4, 3.2 mm (3/32", 1/8") 2.4, 3.2 mm (3/32", 1/8") 2.4, 3.2 mm (3/32", 1/8")
Rotation Speed (rpm) 0.19 - 3.8 rpm 0.11 - 2.2 rpm 0.09 - 1.8 rpm 0.05 - 1.0 rpm 0.026 - 0.52 rpm
Protective Gas Ar / Mixed Gases Ar / Mixed Gases Ar / Mixed Gases Ar / Mixed Gases Ar / Mixed Gases
Cooling Water Water Water Water Water
Cooling Flow (mL/min) ≥600 ≥600 ≥600 ≥600 ≥600
OSC Width 20 mm (.75") 40 mm (1.5") 40 mm (1.5") 40 mm (1.5") 40 mm (1.5")
AVC Height 40 mm (1.5") 40 mm (1.5") 40 mm (1.5") 40 mm (1.5") 40 mm (1.5")
Wire Diameter mm (inches) 0.8, 0.9, 1.0 (0.031", 0.035", 0.039") 0.8, 0.9, 1.0 (0.031", 0.035", 0.039") 0.8, 0.9, 1.0 (0.031", 0.035", 0.039") 0.8, 0.9, 1.0 (0.031", 0.035", 0.039") 0.8, 0.9, 1.0 (0.031", 0.035", 0.039")
Max Wire Feed Speed 1800 mm/min (5.5"/min) 1800 mm/min (5.5"/min) 1800 mm/min (5.5"/min) 1800 mm/min (5.5"/min) 1800 mm/min (5.5"/min)
Weight kg (lbs) 5.5 kg (12 lbs)
excludes cable
10.8 kg (23 lbs)
excludes cable
19.5 kg (43 lbs)
excludes cable
21.5 kg (47 lbs)
excludes cable
36 kg (79 lbs)
excludes cable
Dimensions (mm) 370 x 220 x 320 mm 435 x 300 x 400 mm 445 x 375 x 525 mm 465 x 525 x 570 mm 430 x 610 x 680 mm
Dimensions (inches) 14.5" x 8.6" x 12.5" 17" x 12" x 15.5" 17.5" x 14.5" x 20" 18" x 16.5" x 22" 17" x 24" x 26.5"