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Cros-arc 403s Mig Welder

Cros-arc 403s Mig Welder

£1,740.00
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Cros-arc 403s Mig Welder
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  • Cros-arc 403s Mig Welder
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Cros-arc 403s Mig Welder

Cros-arc 403s Mig Welder

£1,740.00
Shipping calculated at checkout.

The CROS-ARC 403S MIG WELDER is an industrial MIG/MAG system for fabrication workshops and demanding professional welding applications.

Key Features

  • Separate four-roll wire feeder
  • Digital voltage and amperage display
  • Industrial three-phase power source
  • Suitable for demanding fabrication work
  • Long-reach interconnecting cable arrangement
  • Water-cooled version also available
Technical Support

Everything we sell is supported by our factory trained engineers at our premesis in Manchester or nationwide through our mobile service engineers.

Delivery + Returns

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Supply voltage

Supply

400V

Warranty

Warranty

2 Years

Service engineers

Service

In-house engineers

Technical support

Support

0161 223 1843

Expert Advice

Dan Jennings

Dan Jennings says

The CROS-ARC 403S is an industrial three-phase MIG/MAG welder intended for heavier fabrication and repair work rather than occasional light workshop use. In a bodyshop or engineering workshop, it is suited to sustained welding on mild steel, using a separate four-roll wire feed unit to maintain consistent wire delivery during longer runs.

Correct setup matters with this type of machine. It requires a 415V three-phase supply, and the wire, liner, contact tip, shielding gas and torch should all be matched to the material and wire diameter being used. Gas flow must also be checked at the torch, particularly where draughts or extraction can disturb the shield.

A common issue I see with industrial MIG sets is poor feeding caused by worn liners, incorrect drive-roll pressure or contamination on the wire. These faults are often mistaken for a power-source problem. Keeping the feed system clean and correctly adjusted makes a noticeable difference to arc stability and weld quality.

Used within its supply and duty limits, the 403S is a dependable choice for regular production and repair work where controlled, repeatable MIG welding is required.

Dan Jennings, Senior Engineer

WHY BUY YOUR EQUIPMENT FROM US?

At BWS, we do more than supply equipment. Our experienced engineers work with the products we sell every day, providing practical advice to help you choose the right equipment for your workshop.

From installation and training to servicing, calibration and repairs, we’re here to support you long after your purchase. You’re not simply buying a machine — you’re gaining access to a team that understands how to keep it working.

See What We Do!

Technical Features

  • 415V threephase industrial MIG/MAG power source for demanding workshop and fabrication applications
  • Advanced inverter technology for efficient welding performance
  • Separate 4roll wire feed unit for stable, consistent wire feeding
  • Digital volt/amp meter for accurate monitoring and adjustment during welding
  • Adjustable welding current range from 45 to 400A
  • Two banks of ten voltage steps for practical control across different material thicknesses
  • Voltage range from 16.5 to 34V
  • 60% duty cycle at 330A for sustained industrial welding work
  • Spot weld timer for repeatable timed welds
  • Stitch weld timer for controlled intermittent welds and reduced heat input
  • Compatible with a wide range of electrode and wire sizes
  • Undergear and cylinder carrier included for easier movement and gas bottle handling
  • Supplied with 1.5m interconnecting cables, 3m primary cable, 3m gas hose, 3m earth return and 4m 360 MIG torch
  • IP23 protection class for use in suitable indoor workshop environments
  • Watercooled version available for applications requiring additional torch cooling during extended welding periods

Specification

Power Supply
415V 3Ph (+15%
Fuse Rating
T25
Current Range
45–400A
Voltage Steps
2 x 10
Voltage Range
16.5–34V
Duty Cycle
330A at 60%
Protection Class
IP23
Weight
145kg
Wire Feed Unit
Separate 4-roll
Meter
Digital volt
Welding Process
MIG
Part Number
CAP0070

FAQs

What power supply does the CROS-ARC 403S require?
It requires a 415V three-phase supply. The published specification lists a T25 fuse requirement, so the installation should be checked by a suitably qualified electrician before connection.
What output and duty cycle does the CROS-ARC 403S provide?
The machine has a 45–400A current range, a 16.5–34V voltage range and a rated duty cycle of 330A at 60%. This makes it suited to demanding fabrication, repair and general industrial MIG/MAG work rather than light domestic use.
What wire-feed and control equipment is included?
It includes a separate four-roll wire-feed unit, a digital volt/amp meter, undergear with cylinder carrier, interconnecting cables, gas hose, earth return and a 4m 360 MIG torch. The four-roll feeder helps maintain stable wire delivery on longer or more demanding welding runs.
Is the CROS-ARC 403S suitable for professional workshop use?
Yes. It is a 415V industrial MIG/MAG welder intended for applications where sustained power and performance are required. It has a robust industrial layout, high-duty-cycle capability and spot and stitch weld timers; BWS can also advise on correct setup, installation and ongoing service requirements.