Nelson N800i


Lightweight (40lb), one person portable, inverter Stud Welder with a stud diameter range of 12 gauge to 1/2″

Please inquire about availability in your region.

Stud Diam. Range

#10 (2mm) - 1/2" (12mm)

Weld Rate

3/16" (5mm): 30 per minute
1/4" (6mm): 23 per minute
5/16" (8mm): 14 per minute
3/8" (10mm): 9 per minute
7/16" (11mm): 5 per minute
1/2" (13mm): 3 per minute


3 Phase 400-480V, 50/60Hz @ 15A

Time Control

5 - 1000 ms

Current Control

50 A - 800 A

Combo Cable

25 ft

Ground Cable

25 ft


  • Energy Efficient inverter saves hundreds to thousands of dollars/euros from old thyristor designs
  • Weld MonitorTM built-in arc energy watchdog to detect bad welds from actual process signals
  • Gun Monitor™ built-in gun watchdog to match gun speed and adaptively compensate for gun wear
  • Cable Monitor™ built-in cable and connector watchdog to detect cable wear and loose connector
  • Stud Expert™ choose setting from stud diameter and can be re-programmed by user spreadsheet
  • Pulse Waveform reduces heat input, cuts surface contaminants and stiffens arc for out-of-position welds
  • Plunge Current™ saves electricity, reduces cable wear, and maintains arc energy despite gun wear
  • Cold Plunge Prevention™ extends arc time when stud plunge is slowed down**
  • Constant Energy™ delivers constant heat input despite surface coating, gun lift and flux ball variation
  • NelwareTM production weld quality record keeping and arc signals oscilloscope PC software
  • PLC interface option provides connectivity to robot and PLC with a host of fieldbus networks
  • Chuck Change Indicator alerts user to perform scheduled preventative maintenance of consumable parts
  • RoHS Compliance eliminates lead and 5 other hazardous substances to protect the environment
  • Lightweight portable design allows a single person to carry the complete welding system, Third generation all digital inverter delivers 50% more power than comparable products, Capable of driving more cable than comparable products available ( 100 – 600 feet).


13" (33cm) H x 10" (25cm) W x 20-1/2" (52cm) D


40lb (18kg)


2 year or 1,000,000 weld warranty

Please refer to the operator's manual before using.