Pipe Welding
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Model 79 Series Full-Function Weld Heads
AMI Model 79 Full-Function, Precision Weld Head with or without Filler Wire
Model 79 Real-Time Weld Sequence
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.
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).
Features
- 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.
Quick Specs
| Model 79-2375 | Model 79-3500 | Model 79-4500 | Model 79-6625 | |
|---|---|---|---|---|
| Wall Thickness | up to 0.44" 11 mm |
up to 0.44" 11 mm |
up to 0.675" 17 mm |
up to 0.75" 19 mm |
| Rotation Speed | 0.1 - 5.0 RPM | 0.05 - 2.0 RPM | 0.05 - 2.0 RPM | 0.05 - 2.0 RPM |
| Torch (water-cooled) |
200 A continuous Duty Cycle |
200 A continuous Duty Cycle |
200 A continuous Duty Cycle |
200 A continuous Duty Cycle |
| Torch Adjustments: Lead/lag |
+/- 5° | +/- 10° | +/- 10° | +/- 10° |
| Cross-seam | +/- 0.25" (6,35 mm) |
+/- 0.375" (9,53 mm) |
+/- 0.375" (9,53 mm) |
+/- 0.375" (9,53 mm) |
| Tilt in / tilt out | 15°/45° | 15°/45° | 15°/45° | 15°/45° |
| Wire Feeder | Integral, cable- mounted 5 - 100 IPM |
On-board 5 - 100 IPM |
On -board 5 - 100 IPM |
On-board 5 - 100 IPM |
| Wire Spool Size | 2 lbs, (4") standard 0,9 kg, (101,6 mm) |
Low-profile standard 2 lbs., (4") optional 0,9 kg, (101,6 mm) |
2 lbs, (4") standard 0,9 kg, (101,6 mm) |
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) |
0.030" or 0.035" (0,75 mm or 0,9 mm) |
0.030" or 0.035" (0,75 mm or 0,9 mm) |
0.030" or 0.035" (0,75 mm or 0,9 mm) |
| Weight | 11 lbs. 5 kg |
14 lbs. 6,35 kg |
16 lbs. 7,25 kg |
22 lbs. 10 kg |
| Weld Head Model # |
Tube / Pipe OD Range |
Dimensions | |||
|---|---|---|---|---|---|
| A * | B | C | R | ||
| 79-2375 | 0.750" - 2.375" 19 mm - 61 mm |
4.50" * 114 mm |
16.25" 413 mm |
0.63" 16 mm |
3.43" 87 mm |
| 79-3500 | 1.00" - 3.50" 25 mm - 90 mm |
4.50" * 114 mm |
19.25" 490 mm |
0.63" 16 mm |
4.25" 108 mm |
| 79-4500 | 1.90" - 4.50" 48 mm - 114 mm |
4.50" * 114 mm |
19.25" 490 mm |
0.63" 16 mm |
5.25" 133 mm |
| 79-6625 | 2.00" - 6.625" 50 mm - 170 mm |
4.50" * 114 mm |
19.25" 490 mm |
0.63" 16 mm |
6.31" 160 mm |
| * with cross-seam "in" all the way | |||||
