The widest range of orbital welding equipment in the world The Model 81 is a full function orbital pipe weld head featuring programmable Arc Voltage Control, Torch Oscillation, onboard Wire Feeder and Travel in a very compact package. The Model 81 in its standard configuration will weld pipe from 1.9" (48 mm) OD to 5.563" (142 mm) OD with as little as 1.750" (45 mm) radial clearance and 6.325" (161 mm) axial clearance. The Model 81 is used in a wide variety of applications that require high quality welding results in applications with limited axial and radial clearances. Common uses for the Model 81 include shipbuilding and high-pressure steam piping in fossil fuel power plants and many other applications. Pipe OD Range Torch Oscillation Stroke Wire Feed Speed Travel Speed 1.9” - 5.567” (48 mm - 142 mm) 0.31” (7,87 mm) 1.0 - 100 IPM (25 - 2540 mm/min.) 0.1 - 10 IPM (2,5 - 250 mm/min.) AVC Stroke Filler Wire Size Wire Spool Weight 0.750” (2,4 or 3,2 mm Ø) 0.030” or 0.035” (0,8 or 0,9 mm Ø) 0.5 lb. special spool (0,2 kg ) other sizes available 6 lbs. (2,7 kg) (less cables) Tungsten Size Axial Clearance Radial Clearance 3/32” or 1/8” (2,4 mm or 3,2 mm Ø) 6.325” (160 mm) minimum 1.75” (45 mm) minimum Torch Torch Cross-Seam Steering Range Water-cooled, 200 A DC 0.31” (8 mm) motorized 100% Duty Cycle (standard) 0.25” (6,35 mm) manual Torch Adjustments lead / lag +/-15° tilt in / out +/-15°

STANDARD FEATURES The unique clamping assembly of the Model 81 weld head increases production rates by minimizing the mounting and dismounting times of the weld head to as little as 30 seconds each. 1. Servo-controlled rotation 2. Servo-controlled AVC 3. Servo-controlled synchronized wire feed 4. Servo-controlled torch oscillation 5. Motorized torch steering 6. Water-cooled body for use in pre-heated pipes OPTIONAL HARDWARE 200 A torch with direct-view cameras, to monitor leading and trailing edges of the weld puddle in hazardous environments AVC tilt, to allow the AVC motion of the torch to...