The Lincoln Electric FineLine 170HD (K4910-1) is Lincoln Electric's flagship 170-amp high-definition plasma cutting system, designed for precision automated plasma cutting in structural fabrication, heavy plate processing, shipbuilding, and advanced CNC cutting operations. According to Lincoln Electric's FineLine HD product page, the FineLine 170HD pierces most metals up to 1.25 inches (30 mm) thick and achieves a maximum cutting capacity of 2 inches (50 mm) — delivering high-definition cut quality that approaches laser-cut tolerances on thick plate at plasma cutting production rates.
The FineLine 170HD distinguishes itself from conventional air plasma systems through its high-current-density plasma arc — operating at approximately 40,000–50,000 amps per square inch versus 12,000–20,000 amps per square inch for conventional plasma. This produces a dramatically tighter kerf width, squarer cut edge angles (2–4° versus 6–10° on conventional plasma), and superior surface finish that minimizes or eliminates secondary grinding operations on precision-cut parts. For CNC production facilities where part tolerances and edge quality directly impact downstream assembly and fabrication costs, the FineLine 170HD delivers measurable economic advantages per linear foot of cut.
The FineLine 170HD supports multiple plasma and shield gases — O₂, N₂, Air, H17 (hydrogen/argon/nitrogen blend), and Argon — enabling optimized cut quality across different material types: oxygen plasma for mild steel (maximum cut speed and edge squareness), nitrogen plasma for stainless steel and aluminum (prevents oxidation), and specialty gas blends for exotic metals and ultra-high-quality surface finish applications. This gas flexibility in a single power source enables one FineLine system to handle the full range of materials in a production facility.
The FineLine 170HD's single-interface control system allows complete user control from the cutting table HMI, with the motion controller automatically adjusting plasma current and gas pressures for material changes — reducing operator setup time and eliminating manual plasma parameter adjustments between jobs. Remote on/off control and real-time system status feedback complete the FineLine's industrial-grade automation feature set.
| SKU / Model | K4910-1 / FineLine 170HD |
| System Type | High-Definition (HD) Plasma Cutting System |
| Output Range | 80–170 A |
| Rated Output | 170A / 210V / 100% |
| Input Voltage | 380–415 V, 3-Phase, 50/60 Hz |
| Cutting Method | Automated / Mechanized (CNC table, robotic, structural beam lines) |
| Cut Capacity — Production Pierce | 1.25 in. (30 mm) |
| Cut Capacity — Maximum | 2 in. (50 mm) |
| Plasma Gas Options | O₂, N₂, Air, H17, Argon |
| Shield Gas Options | Air, N₂, Water (H₂O) |
| Cut Quality | High-Definition — 2–4° edge angle per ISO 9013 |
| Control | Single-interface HMI control; automated gas pressure adjustment; remote on/off |
| System Components | FineLine Power Supply + Arc Start Console + Gas Controller (system) |
| Warranty | 3 Years — Lincoln Electric factory (all machine components) |
| Condition | New — Lincoln Electric K-prefix (factory-new) |
- FineLine 170HD Power Supply (K4910-1)
- FineLine Arc Start Console
- FineLine Gas Controller
- Plasma torch and torch leads (configuration per system order)
- System cabling and gas hose assemblies
- Operator's manual and installation documentation
- Note: CNC cutting table, gas supply, and cooling water system are not included. Contact WeldingMart for complete FineLine system integration support.
Complete your FineLine 170HD installation with WeldingMart's Lincoln-compatible accessories:
- FineLine HD Plasma Torches — Magnum Pro LC170M straight and bevel plasma torch packages for FineLine 170HD; extended-lead torch assemblies for large-format CNC table configurations; bevel and robotic torch heads for 3D cutting and pipe profiling applications.
- FineLine HD Consumables — Genuine Lincoln Electric HD plasma electrodes, nozzles, shields, and retaining caps for the FineLine 170HD torch system; application-specific consumable sets for oxygen/mild steel, nitrogen/stainless, and specialty gas combinations; production consumable kits for initial system commissioning and sustained production operation.
- Gas Regulators & Supply Systems — Industrial-grade CGA-580 oxygen regulators, nitrogen regulators, and specialty gas regulators for FineLine's multi-gas system; high-purity gas manifold assemblies for shops running multiple FineLine cutting stations; gas cabinet and distribution systems for production floor gas management.
The FineLine 170HD is the standard for precision automated plasma cutting across demanding industrial sectors:
- HVAC — industrial precision duct and HVAC structural fabrication. On large-format CNC cutting tables, the FineLine 170HD cuts heavy-gauge stainless and aluminized HVAC ductwork components, complex fitting geometries, and structural HVAC support assemblies with HD cut edge quality that eliminates secondary edge prep. For industrial HVAC fabricators producing precision components for pharmaceutical, food processing, and cleanroom HVAC systems, FineLine cut quality meets the dimensional and finish requirements that conventional plasma cannot.
- Automotive — stamping die fabrication, tooling, and heavy chassis production. Stamping die blanks, fixture plates, and production tooling in D2, H13, and mild steel plate cut to high-definition tolerances at plasma production rates. Heavy-duty chassis and frame production in 1/2 in. through 1 in. mild and high-strength steel with the dimensional accuracy needed for robotic welding fixtures and assembly jigs.
- Structural steel fabrication — precision plate and beam processing. Precision cut-to-length plate and structural shape processing for fabrication shops, steel service centers, and structural steel manufacturers. HD cut quality on mild steel plate minimizes grinding and secondary preparation before welding, directly reducing labor cost per fabricated assembly. Bevel torch configurations enable automated weld-prep beveling in a single CNC cut pass.
- Art, architectural metalwork, and precision fabrication. Architectural steel panels, large-scale decorative installations, and custom precision metalwork produced on CNC tables at HD cut quality — tolerances and edge finish approaching laser cutting at substantially lower capital cost per linear foot for material thicknesses above 1/4 in. where laser becomes cost-prohibitive.
- Demolition and industrial MRO — precision structural cutting. In industrial facility decommissioning and structural modification, the FineLine 170HD cuts structural members, heavy plate, and large-diameter pipe to precise dimensions for reuse, recycling, or safe removal. The 2-in. maximum capacity and 100% duty cycle sustain production-rate cutting on the heaviest structural elements in industrial demolition programs.
The FineLine 170HD (K4910-1) achieves production pierce capacity of 1.25 in. (30 mm) and maximum cutting capacity of 2 in. (50 mm) on mild steel. Per Lincoln Electric's FineLine HD page, the 170HD cuts stainless steel to 1 in. production and 1.5 in. maximum, and aluminum to 0.75 in. production and 1.5 in. maximum, using appropriate plasma gas selections (nitrogen for stainless, air or nitrogen for aluminum).
The FineLine 170HD delivers 100% duty cycle at rated output (170A / 210V / 100%), enabling continuous production plasma cutting at full output without thermal shutdown. This is the standard for industrial automated plasma systems designed for production CNC table operation, where 60–80% duty cycle on conventional systems would create throughput-limiting cooling cycles.
The FineLine 170HD uses Lincoln Electric's high-frequency arc start system (standard for high-definition plasma systems), with a CleanStrike arc start technology that delivers consistent, reliable arc initiation. Unlike handheld plasma systems, the FineLine 170HD is a mechanized/automated system where HF arc start is managed within the system's arc start console, avoiding the field HF interference concerns relevant to handheld plasma. The system produces precise arc initiation for pierce-start CNC cutting on steel, stainless, and aluminum plate.
The FineLine 170HD is exclusively a mechanized/automated plasma system and is not designed for handheld use. It integrates with CNC plasma cutting tables, robotic cutting systems, pipe profiling machines, and structural beam cutting lines through a single-interface control system that allows the motion controller to adjust plasma current and gas pressures automatically for material changes. For CNC table integration, contact WeldingMart for FineLine 170HD system configuration and Torchmate table compatibility information.
The FineLine 170HD requires multiple gas supplies depending on the cutting application: compressed air (105–145 PSI) for air-plasma cutting of mild steel, stainless, and aluminum; high-purity oxygen (CGA-540) for oxygen-plasma mild steel cutting (maximum cut speed and squareness); high-purity nitrogen for stainless steel and aluminum plasma and shield gas; and H17 (argon/hydrogen/nitrogen blend) for specialized high-quality stainless cutting. Gas pressure requirements are 105–145 PSI (7.6–10 Bar) at the gas controller inlet. A dedicated gas supply system with appropriate regulators and manifolds is required for multi-gas operation. Contact WeldingMart for FineLine 170HD gas system configuration support.