The Lincoln Electric FlexCut 45 is the mid-entry model in Lincoln Electric's completely redesigned FlexCut plasma cutter lineup — the most significant upgrade to Lincoln Electric's portable plasma range in years. According to Lincoln Electric's FlexCut plasma overview, the FlexCut 45 delivers 45 amps of cutting power, cuts mild steel up to 7/8 in. thick, and operates on dual-voltage 120V or 230V single-phase input. Unlike the FlexCut 35, the FlexCut 45 is CNC table-ready out of the box for any shop that wants to grow into automated cutting.
The FlexCut 45 features an LCD display with guided process selection (cutting, gouging, grid/expanded metal cutting), a Parts-in-Place consumable detection system, a built-in inline air dryer, and the FlexConnect torch system for rapid torch head or cable swap. The non-HF arc start with rapid arc restrike delivers consistent pilot arc performance on expanded metal, painted surfaces, and rusty steel without grinding. At 100% duty cycle, the FlexCut 45 runs continuously in sheet metal production without thermal downtime.
At 45 amps, the FlexCut 45 covers the most common range of professional plasma cutting tasks: 14-gauge through 1/2 in. mild steel at production speed, with the ability to cut up to 7/8 in. for structural sections and thicker plate. The dual-voltage input makes it the right machine for contractors who need 120V job-site operation and 230V shop performance from the same unit — no tools required to switch input voltage.
Lincoln Electric backs the FlexCut 45 with a 5-year factory warranty — the longest standard warranty on any Lincoln Electric portable plasma cutter. The complete consumable kit ships in the box, so you're cutting immediately on delivery.
| SKU / Model | FlexCut 45 (Handheld Ready-Pak: K5823-H | Mechanized Ready-Pak: K5823-M) |
| Process | Plasma Cutting, Gouging, Grid-Cutting (PAC) |
| Output (Amps) | 45 A |
| Input Voltage | 120V or 230V, Single-Phase, 50/60 Hz (dual-voltage) |
| Duty Cycle | 100% at rated output |
| Cut Capacity — Mild Steel (Recommended) | 5/8 in. (16 mm) |
| Cut Capacity — Mild Steel (Maximum) | 7/8 in. (22 mm) |
| Materials | Mild steel, stainless steel, aluminum, and other conductive metals |
| Arc Start | Non-High-Frequency (touch-start / rapid arc restrike) — CNC-safe |
| Display | LCD display with guided mode selection |
| Torch System | FlexConnect — quick-swap torch heads and cables |
| Integrated Air Dryer | Yes |
| CNC / Mechanized Ready | Yes — built-in CPC port for mechanized torch and CNC table integration |
| Air Pressure Required | 80–120 PSI |
| Warranty | 5 Years — Lincoln Electric factory (new FlexCut line) |
| Condition | New — Lincoln Electric K-prefix (factory-new) |
- FlexCut 45 Plasma Cutter Power Source
- 25 ft FlexConnect Handheld or Mechanized Torch (based on Ready-Pak selected)
- Work Cable & Ground Clamp
- Input Power Cord
- Complete Consumable Package: nozzles, diffusers, electrodes, drag cups, swirl ring
- Integrated air dryer with airline attachment
- Operator's manual
Expand your FlexCut 45's capability with WeldingMart-stocked Lincoln accessories:
- Plasma Torches — FlexConnect handheld torches in 25 ft lengths; mechanized torch packages for CNC table integration; flexible torch heads and extended-reach bodies for cutting pipe, structural sections, and confined-space cuts.
- Plasma Consumables — FlexCut-series electrodes, nozzles, shields, and drag cups; multi-pack production consumable kits for sustained sheet metal and structural cutting; gouging nozzle sets for weld removal and joint preparation.
- Air Regulators & Filters — Inline moisture separators and particulate filters for job-site compressor air; portable desiccant dryers for extended field operation; quick-disconnect fittings for fast plasma-to-air-tool changeovers on job sites.
The FlexCut 45's 45 A output, CNC-ready port, and 7/8 in. cut capacity make it the crossover tool between light portable and professional-grade plasma cutting:
- HVAC ductwork — on-site and in-shop. At 120V on the job site, cuts 26-gauge through 3/16 in. galvanized and stainless duct, structural HVAC angles, and equipment curbs. At 230V back in the shop, the same machine handles 1/4 in. and 3/8 in. steel strut, equipment pads, and custom sheet metal fabrication. The built-in air dryer handles job-site air quality without a separate filter kit.
- Automotive bodywork and restoration. The FlexCut 45 at 45 A cuts floor pans, frame sections, rocker panels, and suspension brackets from 18-gauge through 3/8 in. without consumable changes between thicknesses. The rapid arc restrike function maintains cutting continuity through rust pits and paint layers common in restoration work. Non-HF start is safe adjacent to fuel system sensors and vehicle electronics.
- Structural steel fabrication. On 230V, cuts flat bar, square tube, angle, and plate up to 5/8 in. recommended for structural repairs, equipment frames, and custom brackets. The CNC-ready port allows the same power source to run a small CNC plasma table for production part cutting when handheld precision isn't required.
- Art, custom fabrication, and makerspaces. 45 A covers the full range of sheet metal art applications from 20-gauge decorative panels through 3/8 in. structural art plate. The LCD guided setup is accessible for students and artists new to plasma cutting; the FlexConnect torch system allows quick changes between detailed cutting heads and standard drag-shield torch configurations.
- Demolition, scrap prep, and field MRO. On a 120V extension cord, the FlexCut 45 cuts structural angle, rebar, painted structural steel, and heavy expanded metal in field maintenance and demolition contexts. The 7/8 in. maximum cut capacity handles heavier structural members than typical 30–40 A portable plasma cutters, giving field crews more capability per machine.
The FlexCut 45 cuts mild steel up to 7/8 in. (22 mm) maximum and up to 5/8 in. (16 mm) at recommended production cutting speed on 230V input. On 120V, rated performance is reduced — typical production cutting on 120V is best limited to 1/4 in. The machine also cuts stainless steel and aluminum at comparable thicknesses. Per Lincoln Electric's FlexCut specifications, the FlexCut 45 is the smallest model in the lineup with 7/8 in. capacity.
The FlexCut 45 is rated at 100% duty cycle at rated output on 230V input. This means the machine can run continuously without thermal shutdown at full 45 A cutting power — a significant capability for production sheet metal cutting. On 120V, sustained duty cycle at maximum 120V output may be lower; for all-day production cutting, 230V input is recommended.
The FlexCut 45 uses a non-high-frequency touch start with rapid arc restrike technology. The restrike function rapidly re-establishes the plasma arc after crossing gaps in expanded metal, perforated sheet, or corroded surfaces, delivering consistent cutting continuity on interrupted-surface work. The non-HF design avoids electromagnetic interference with CNC controllers, vehicle electronics, and sensitive shop equipment near the cutting area.
Yes. The FlexCut 45 includes a built-in CPC port for connecting a mechanized machine torch and integrating with CNC plasma cutting tables. The mechanized Ready-Pak (K5823-M) ships with a machine torch configured for CNC table mounting. The non-HF arc start and CNC interface signal are compatible with table torch height control (THC) systems. For larger CNC table applications with heavier material requirements, see the FlexCut 80 (K4809-1).
The FlexCut 45 requires 80–120 PSI compressed air. A compressor producing 5–7 SCFM at 90 PSI with an 8-gallon or larger tank provides sufficient air for continuous cutting at 45 A. The built-in air dryer removes moisture from the compressed air supply before it reaches torch consumables, extending electrode and nozzle life beyond what an unfiltered direct compressor connection would provide. For sustained CNC or production cutting sessions, a larger compressor (20-gallon, 5 HP, 7+ SCFM) is recommended to prevent pressure drops during extended arc-on time.