HBS-ARC-1550 Stud Welding Unit

ARC stud welding according to current standards.

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

Process variants

  • Short cycle drawn arc welding
  • Drawn arc welding


  • Welding with ceramic ferrule (series)
  • Welding with shielding gas (series)
  • Automation (optional)

Technical Data

Gas/Automation Series/Option
Welding range #4 to 3/4”, dia. 14 ga to 3/4″ (M3 – M20 RD, dia. 2 to 19 mm)
Welding material Mild steel, stainless steel
Welding rate 3 to 35 studs/min (depending on application and stud dia.)
Welding current 1,550 A
Current adjustment range 500 to 1,550 A (500 A – 800 A – 1,000 A – 1,200 A – 1,550 A)
Welding time 5 to 1,500 msec (stepless)
Primary power 460 V, 3 phases, 50/60 Hz, 63 AT (alternative input voltages available)
Connected Load 40 KVA (at 460 V mains)
Power source Transformer/Rectifier
Primary Cable 16.40′, 1/0 (5 m, 6 mm²), 460 V; max. cable length 98.42′ (30 m), 1/0 (6 mm²) at 400 V
Max. welding cable extension 65.62′, 4/0 (20m, 95 mm²)
Cooling Type F (temperature controlled cooling fan)
Protection class IP 23
Operational and storage conditions According to current standards
Dimension L x W x H 18.11″ x 15.74″ x 28.74″ (460 x 400 x 730 mm) without handle
Weight 293.21 lbs (133 kg)
Order No. 93-16-1552 (Gas)93-16-1554 (Gas/Automation)

Printable Specsheet



  • 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
  • Display of error codes – on digital display
  • Lift test – for gap welding guns and stud welding heads
  • Power regulation – constant power input for reproducible, good welding results; compensation of differences in arc voltage (e.g. drop formation); compensation of changes in resistance due to transformer warming; compensation of fluctuations in mains volautomatically regulated


  • Extremely easy to operate
  • Compact
  • Mobile – most mobile stud welding unit of its class thanks to large rubber wheels (trolley design); stairs, ridges and cables are no longer obstacles; easy transport due to integrated crane hook
  • 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)
  • Consistent separation of transformer and control unit – protects electronic components against dust and thermal loading
  • Control unit galvanically separated from welding lines – high degree of functional safety
  • Cooling-air tunnel – channelling of cooling air to the transformer protects electronic components against dirt and dust
  • Optimal protection against external interferences
  • Protection class IP 23
  • Also permits operation outdoors


  • Display – infinitely adjustable power setting; easy monitoring of all functions via LED displays; display of welding and gas-preflow time (optional: pneumatic feed time for automation); control and monitoring of all system functions; extremely easy operation via keyboard; flashing display indicates power-mode operation
  • Powerful – built-in power reserves
  • Trouble-free changing of welding voltage polarity possible by reconnecting welding current and ground cables
  • Welding current setting – adjustable to 500 A, 800 A, 1,000 A, 1,200 A, or 1,550 A

Suitable stud welding guns

  • A 12, A 16, A 22, AI 06
  • PAH-1 (only suitable for automatic version)
  • KAH 412, KAH 412 LA (only suitable for automatic version)


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