CUT-120B
CUT-120B combines three-phase 380V input, built-in and external air source compatibility, plasma cutting plus manual arc welding, and the highest output in this built-in compressor group for heavier carbon steel, stainless steel, and aluminum plate cutting in industrial fabrication and field service work.
A high-capacity inverter plasma cutting and MMA platform with integrated air source support, external compressed air compatibility, and stronger cutting reserve for thicker plate and heavier production work.
CUT-120B Technical Specifications
Core electrical data, air source configuration, and cutting capability for the CUT-120B built-in air compressor plasma arc cutting machine.
High-capacity built-in compressor plasma system for the heaviest cutting work in this CUT-B group.
CUT-120B is positioned for users who want the same integrated air-source convenience as the smaller models but need more cutting reserve, heavier plate capability, and a larger machine format for demanding fabrication work.
Dual air supply and dual-function cut + weld capability
The machine supports both the built-in air compressor and external compressed air source while combining plasma cutting and MMA welding in one machine, helping cover cutting and repair tasks across workshop and field conditions.
All-in-one structure with more cutting reserve for thicker plate work
Power source, air compressor, and cutting system are combined in one machine body, but the 120 class platform is tuned for heavier cutting applications where thicker sections and higher output reserve matter.
20 kHz IGBT inverter technology for stable heavy-duty cutting output
The power section uses a 20 kHz IGBT inverter platform to support stable arc characteristics, efficient operation, and strong output reserve for demanding cutting work.
Air-cooled construction with 60% duty cycle at 25°C
The specification table lists air cooling for both power source and torch, 60% duty cycle at 25°C, Class F insulation, and IP21S enclosure protection for demanding workshop and field use.
Non-HF compressed-air cutting with the highest stated thickness range in the series
The table specifies compressed air as the plasma gas, non-HF arc starting, 30 mm recommended carbon steel cutting thickness, and maximum cutting thickness up to 40 mm with the built-in air source or 50 mm with an external air source.
Standardized product positioning
- Model: CUT-120B (Built-in Air Compressor)
- Type: inverter plasma arc cutting machine
- Functions: plasma cutting plus manual arc welding
- Air source: built-in plus external air support
- Input: three-phase 380V
Integrated compressor support with external air expansion when needed
- Built-in air supply supports more independent on-site use without separate compressor dependence.
- External air source remains available when process setup requires it.
- Integrated structure keeps the machine practical for maintenance and field service teams.
- Useful for heavier cutting tasks where mobility and output both matter.
Built for plate cutting and repair across fabrication environments
- Carbon steel, stainless steel, and aluminum plate cutting
- Heavy fabrication, installation, maintenance, and repair work
- Mechanical cutting, slotting, and opening tasks
- Use cases that benefit from built-in or external air supply
Table-backed cutting references
- Recommended cutting thickness: 30 mm carbon steel
- Maximum cutting thickness with built-in air: 40 mm
- Maximum cutting thickness with external air: 50 mm
- Applicable plasma gas: compressed air
Choose built-in compressor, professional IGBT, or heavy-duty HD plasma systems by air supply, output, and continuous-duty demand.
This plasma lineup combines integrated CUT-B machines for mobile cutting and repair with LGK inverter and heavy-duty HD systems for higher-output fabrication, structural work, maintenance, and CNC-ready industrial applications.
All-in-one plasma plus MMA machines for portable service work and workshop flexibility
- CUT-80B prioritizes dual-voltage mobility and lighter plate cutting in a more compact all-in-one format.
- CUT-100B and CUT-120B raise three-phase output for thicker sections while retaining built-in and external air support.
- Choose this group when independent air supply, field deployment, and combined cutting plus stick capability matter most.
External-air industrial plasma cutters for fabrication shops, maintenance teams, and medium to heavy plate work
- LGK-63IGBT covers compact 63A cutting with divided-voltage output options and a smaller 26 kg machine body.
- LGK-120IGBT and LGK-200IGBT extend the range for 100% duty cycle production cutting with higher-quality cut capacity.
- Choose this group when dedicated compressed air, industrial inverter efficiency, and manual or CNC-ready cutting are the main priorities.
Maximum-output plasma platforms for thick carbon steel, longer cycles, and demanding production environments
- LGK-300HD and LGK-400HD deliver 100% duty cycle at 40°C with non-contact arc ignition for severe industrial duty.
- These models support thicker manual or CNC cutting with air- or water-cooled torch options and compressed-air supply.
- Choose this group when thicker plate, continuous operation, and high-output structural or shipyard work are the main requirements.
Verify package scope and application suitability before order confirmation.
Published specifications, standard delivery scope, and accessory ratings are for reference only and may change without notice. Included plasma torch assemblies, work return clamps, air regulators, filters, air hoses, interconnection leads, CNC interface cables, built-in compressor components, water-cooling units, plugs, consumables, and other accessories may vary by model, package, and destination market. Before supply, confirm the required plasma cutting application, any auxiliary MMA function where applicable, input power, output current, duty cycle, air source configuration, torch or lead length, target cut thickness, and applicable local compliance requirements for the intended application.