IT 90

Drawn arc with ceramic ferrule (ARC) Drawn arc with shielding gas (ARC) Short-cycle (SC)
Mild steel Stainless steel Aluminium
M3 to M24 - #4 to 1“



  • Especially suitable for thicker sheets of about 2 mm or higher


  • Microcontroller – for precise process times, optimal functional reliability and maximum operating convenience
  • Function monitoring – automatic function test following power-up; monitoring of all internal system functions
  • Lift test – for gap welding guns and stud welding heads
  • Library function – automatic specification of welding current and welding time through selection of stud diameter according to welding range (with and without shielded gas); fine adjustment via arrow keys
  • Process monitoring – recording and analysis of factors affecting the welding process; after each weld, the reference and actual values are compared; display of the welding energy input; switchable automatic welding stop if limits are exceeded
  • RS232 interface – for data output; data and time of day are stored; welding parameters of each weld are logged)
  • 4 gun connections (optional)


  • Extremely easy to operate
  • Compact
  • Mobile – highly mobile thanks to compact dimensions and low weight (50 % weight savings vis-à-vis conventional stud welding units)
  • Robust – metal housing withstands rough treatment in shop and on site


  • With integrated mains filter (protection against voltage peaks)
  • Optimal for construction sites with large mains voltage fluctuations – use even with critical voltage supply (- 10 % + 10 %)
  • EMC test
  • High-voltage test with log
  • Retriggering lock-out – prevents welding on a welding element that has already been set
  • Thermal monitoring of transformer – automatic shutdown in case of overheating
  • Temperature-regulated ventilator - reduces noise and dust in the stud welding unit (greater system reliability)
  • Control unit galvanically separated from welding lines – high degree of functional safety
  • Optimal protection against external interferences
  • IP Code: IP 21


  • Display – infinitely adjustable power setting; easy monitoring of all functions via LED displays; easy operation via membrane keyboard and digital display; setting of welding parameters, programs, shielding gas, automation and process monitoring possible; digital display of current, welding and gas-preflow time (optional: pneumatic feed time for automation); separate settings for welding current and welding time
  • Powerful – built-in power reserves
  • Trouble-free changing of welding voltage polarity possible by reconnecting welding current and ground cables
  • Outstanding welding quality – very high arc stability even at weak welding currents
  • High process flexibility – high clock frequency (30 kHz) of stud welding unit allows highly dynamic regulation of welding process
Welding range M3 to M24, dia. 2 to 22 mm / #4 to 1“, dia. 14 ga to 7/8“
Welding rate Dia. 22 / 7/8“ = 6 studs/min
Welding current 2 000 A (max.)
Current adjustment range 300 to 2 000 A (stepless)
Welding time 5 to 1 500 ms (stepless)
Primary power 400 V*, 3 phases, 50/60 Hz, 63 AT (slow blow) *alternative primary power see „Order No.“
Primary plug 63 A (with 400 V mains)
Connected load 100 kVA (with 400 V mains)
Cooling type F (temperature controlled cooling fan)
IP Code IP 21
Dimension LxWxH (without handle) 650 x 560 x 1290 mm / 25.6“ x 22“ x 50.8“
Weight 145 kg / 319.67 lbs (1 gun conn.) 165 kg / 363.76 lbs (4 gun conn.)
Suitable guns A 12, A 12-FL, A 16, A 22
Order No. 93-60-42096 (400 V - 4 gun connection) 93-66-42096 (480/460 V - 4 gun connection)

Suitable stud welding guns: