Plasma Cutter LGK-120 | Industrial IGBT Inverter Metal Cutting Machine

Heavy industrial fabrication—shipbuilding, mining equipment manufacturing, structural steel construction, and pressure vessel production—demands cutting equipment that can handle extreme thicknesses, maintain performance under punishing conditions, and deliver the reliability required for critical applications where downtime is simply not an option. The LGK-120 heavy-duty plasma cutter rises to this challenge, combining a high-output IGBT inverter power source with advanced cooling, robust componentry, and exceptional cutting capability to deliver the raw power and endurance that heavy industry requires.

Industrial-Grade Power for Maximum Penetration

The LGK-120 is built around a purpose-designed IGBT inverter module that delivers substantial cutting current with exceptional efficiency and stability. Unlike lighter-duty machines that struggle to maintain arc quality at high power levels, the LGK-120 maintains its focused, high-energy plasma stream even when operating at its maximum rated output for extended periods. This consistent high-power delivery translates to impressive cutting speeds on thick carbon steel, significantly outperforming traditional oxy-fuel torches and lower-amperage plasma systems. For heavy fabricators, this means faster production cycles, reduced labor costs, and the ability to take on thicker, more demanding projects that would otherwise require specialized equipment or subcontracting.

Superior Arc Stability Under Demanding Loads

One of the key engineering achievements of the LGK-120 is its ability to maintain arc stability even when cutting materials with varying surface conditions, such as rusty or painted steel plate. The advanced feedback control system continuously monitors output parameters and makes instantaneous corrections to keep the arc focused and consistent, preventing the flickering and power drop-outs that plague less capable machines. This stability is essential for achieving the clean, uniform cuts that heavy structural components require, particularly when cut edges will be welded and subjected to high stress. The result is a more consistent finished product with fewer defects and less rework.

Cutting Quality That Reduces Post-Weld Preparation

For heavy plate cutting, the quality of the cut surface has a direct impact on downstream welding operations. Rough, beveled, or slag-covered edges require extensive grinding, chamfering, or beveling before they can be welded, consuming valuable labor time and introducing the potential for weld defects. The LGK-120 addresses this by producing exceptionally clean, square cut surfaces on thick materials, with minimal dross and a narrow heat-affected zone. The smooth edge finish reduces or eliminates the need for mechanical preparation, allowing parts to proceed directly to fit-up and welding. This not only reduces manufacturing costs but also improves welding quality by providing consistent, clean joint geometries.

Heavy-Duty Construction for Continuous Operation

The LGK-120 is built with the realities of the heavy fabrication shop in mind. Its robust construction includes reinforced internal components, a high-capacity cooling system that prevents overheating during prolonged high-amperage cutting, and durable external casing that withstands the bumps and impacts of a busy workshop environment. The machine is designed for a high duty cycle, meaning it can operate at maximum power for extended periods without thermal shutdown or performance degradation. This reliability is crucial for fabricators working on large-scale projects where delays can ripple through the entire production schedule and impact contract deadlines.

Instant Arc Ignition Even with Long Torch Leads

Heavy fabricators often work on large workpieces where the operator needs to move the torch a significant distance from the power source. Long torch leads can make arc starting more challenging, but the LGK-120's powerful high-frequency ignition system is designed to overcome this issue, providing instant, reliable arc initiation regardless of cable length. This feature is particularly appreciated in shipyard and structural steel environments where operators frequently work at the outer edges of large assemblies and need quick, dependable starts to maintain productivity.

Self-Locking Mode for Extended Straight-Line Cuts

The LGK-120's self-locking cutting mode is especially valuable for heavy plate work, where operators frequently need to make long, continuous straight cuts on large plates or beams. By locking the torch in the "on" position, the operator can focus on maintaining a steady travel speed and consistent torch height without the distraction of holding down the trigger. This reduces fatigue during extended cutting sessions and contributes to more consistent cut quality across the length of the workpiece.

Seamless CNC Integration for Large-Scale Automation

For fabrication shops using large CNC gantry systems, the LGK-120 offers stable, reliable signal interface that ensures precise synchronization between the torch movement and the cutting output. This integration enables automated cutting of large plates with high repeatability and accuracy, reducing the need for manual fitting and improving overall production efficiency. The machine's consistent performance at high power levels makes it an excellent choice for automated cutting cells that operate around the clock.

Unmatched Material Versatility

The LGK-120 is compatible with all common industrial metals, excelling particularly on thick carbon steel and stainless steel used in heavy construction. It also delivers strong performance on thick aluminum sections, copper, and other non-ferrous materials, making it a versatile solution for heavy fabrication shops that handle a wide range of projects. One powerful machine covers the majority of heavy cutting needs.

In conclusion, the LGK-120 is the definitive heavy-duty plasma cutting solution for fabricators who need maximum power, relentless reliability, and exceptional cut quality on thick materials. Its robust construction, advanced power control, and automation-friendly design make it a trusted partner in the most demanding industrial environments.

Technical Parameters of LGK-120 Plasma Cutter

Input Voltage:AC380V ±15%

Rated Input Capacity:19.8 kVA

Rated Input Current:30.2 A

Cutting Current Adjustment Range:30 – 120 A

Output No-load Voltage:310 V

Rated Load Voltage:128 V

Duty Cycle:60%

Cutting Torch Working Air Pressure:0.45 MPa

Maximum Cutting Thickness:40 mm

Cutting Gas Flow:250 L/min

Enclosure Protection Rating:IP21S

Overall Dimension (L×W×H):595 × 306 × 530 mm

Weight:34 kg