Project Description

model-79The 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.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.

Compatible with the AMI Model 227 and Model 415 Power Supplies.