AMI Model 79-6625 Weld Head

The Arc Machines' Model 79 series weld heads are economical, easy-to-use, sturdy weld heads designed for precision orbital welding - with or without filler wire - of tube, pipe, and fittings. *Package includes y and white cables.


Each Model 79 weld head features Arc Voltage Control (AVC) for precise arc gap control, programmable oscillation (weaving) and a precision wire feeder and wire entry mechanics. All Model 79 weld heads operate using the GTAW (TIG) process and will accommodate a range of pipe sizes from 0.75" OD to 6.625" OD (19 mm to 170 mm) and wall thicknesses up to 0.75" (19 mm).


  • Precision orbital welding heads - with or without filler wire - of tube, pipe, and fittings.
  • Versatile and compatible with a variety of joint designs, such as “V” prep, “J” prep, socket and square butt
  • Accommodates tube, pipe and fittings from 0.75” OD to 6.625” OD (19 mm - 170 mm) with wall thicknesses up to 0.750”. (19 mm)
  • Will weld materials ranging from carbon or stainless steels to exotic alloys including Hastelloy®, Inconel®, and Monel® as well as all other TIG weldable materials.

Quick Specs
Wall Thickness up to 0.675", 17mm
Rotation Speed 0.05 - 2.0 RPM
Torch(water-cooled) 200 A continuous Duty Cycle
Torch Adjustments:
Lead/lag +/- 10°
Cross-seam +/- 0.375" (9,53 mm)
Tilt in / tilt out 15°/45°
Wire Feeder On-board 2-100 IPM
Wire Spool Size 2 lbs, (4") standard 0,9 kg, (101,6 mm)
Filler Wire Size 0.030" or 0.035" (0,75 mm or 0,9 mm)
Weight 16 lbs. (7.25 kg)

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