The Lincoln Electric LN-25X Extra Torque with CrossLinc and TVT (K4267-5) is the high-torque configuration of Lincoln's portable industrial wire feeder platform, engineered to handle large-diameter flux-cored wire up to 3/32 in. (2.4 mm) in demanding construction and shipbuilding applications. Like the standard K4267-4, this model incorporates CrossLinc technology for no-extra-cable voltage control and True Voltage Technology (TVT) for arc voltage compensation across long weld cable runs. The K4267-5 ships without a flowmeter and uses a Tweco gun connector, optimizing it for applications where shielding gas is managed separately or where Tweco-type gun setups are standard.
| Parameter | Value |
|---|---|
| Model / SKU | LN-25X Extra Torque, CrossLinc, TVT, No Flowmeter / K4267-5 |
| Drive Torque | Extra Torque — for large-diameter cored wire up to 3/32 in. |
| Wire Diameter Range (Solid) | 0.023–5/64 in. (0.6–2.0 mm) |
| Wire Diameter Range (Cored) | 0.035–3/32 in. (0.9–2.4 mm) |
| Wire Feed Speed Range | 50–780 IPM (1.3–19.8 m/min) |
| Drive Roll System | Maxtrac 4-roll heavy-duty cast aluminum, extra-torque motor |
| CrossLinc Voltage Control | Yes — control voltage at feeder via existing weld cable |
| True Voltage Technology (TVT) | Yes — voltage drop compensation for long cable runs |
| Flowmeter | Not included |
| Gun Connector | Tweco |
| Trigger Interlock | Yes |
| Case Material | Replaceable, flame-resistant composite |
| PC Board Protection | Potted (moisture and corrosion resistant) |
| Tachometer Feedback | Yes |
| Compatible Power Sources | FLEXTEC 450/500, Power Wave 455M/S500, Idealarc CV series |
The K4267-5 Extra Torque configuration is specified for heavy-wire applications where standard drive torque is insufficient:
- Heavy structural steel and bridge construction — 3/32 in. FCAW-S wire for high-deposition single-pass or multi-pass welds on thick structural sections, operated at distance from the power source.
- Shipbuilding and offshore fabrication — Extra torque handles large cored wire through long conduit runs inside hull structures and confined spaces.
- Industrial construction and plant erection — High-deposition FCAW passes on pressure piping and structural frames where maximizing deposition rate is the priority.
- Maintenance and repair of heavy equipment — Portable feeder handles hardfacing and build-up wires in larger diameters for wear-surface restoration.
- Pipeline and cross-country welding support — Portable setup with CrossLinc eliminates voltage control cables that could be damaged in rough terrain deployment.
The K4267-5 differentiates itself from the K4267-4 in three ways: higher drive torque motor, no integrated flowmeter, and Tweco gun connector:
- Extra Torque Wire Drive — The K4267-5 motor delivers higher torque than the standard LN-25X, providing reliable feeding of 3/32 in. flux-cored wire through long gun assemblies and tight cable bends common in structural and shipbuilding applications. Standard feeders can slip or bird-nest on heavy cored wire at high feed speeds; the extra-torque drive eliminates this.
- CrossLinc Technology — Same voltage control over the weld cable as the K4267-4 — no separate control cable required. Compatible with FLEXTEC 450/500 and Power Wave 455M/S500 power sources.
- True Voltage Technology (TVT) — Measures arc voltage at the feeder and commands the power source to compensate for cable drop. Critical for high-deposition FCAW applications where cable resistance is non-trivial.
- No Flowmeter — For applications where shielding gas flow is monitored at a centralized manifold or where self-shielded FCAW-S is used without a shielding gas supply, the K4267-5 eliminates the flowmeter as an unnecessary component.
- Tweco Gun Connector — Tweco-style connector matches shops standardized on Tweco-termination MIG gun families, simplifying gun inventory management.
- Maxtrac 4-Roll Drive — Cast aluminum housing with gear-driven rolls and tachometer feedback, shared across the LN-25X platform, ensures consistent feed rate independent of motor back-pressure.
The LN-25X K4267-5 works within the same Lincoln power source ecosystem as the standard K4267-4:
- Lincoln LN-25X K4267-4 — Standard torque variant with flowmeter and Twistmate/Dinse connector; compare for applications that do not require extra torque.
- Lincoln 4-Pack Rack FLEXTEC 450 (K2956-2) — Multi-operator rack; pair one K4267-5 per FLEXTEC 450 output for high-deposition structural welding.
- Lincoln POWER WAVE 455M (K2202-1) — Full CrossLinc and TVT capability for high-deposition production cells.
- Tweco MIG guns (Tweco Tough-Gun, Binzel-style) — Tweco connector is native to K4267-5; no adapter required.
View all Lincoln wire feeders and welding equipment at WeldingMart.
What is the difference between the LN-25X K4267-4 and K4267-5?
The K4267-5 Extra Torque has a higher-torque drive motor for feeding large-diameter cored wire up to 3/32 in., comes without a flowmeter, and uses a Tweco gun connector. The K4267-4 uses a standard-torque drive, includes an integrated flowmeter, and ships with a Twistmate/Dinse connector.
Why would I choose the K4267-5 without a flowmeter?
The K4267-5 no-flowmeter configuration is ideal for two situations: when shielding gas flow is monitored at a centralized distribution manifold rather than at the feeder, and when using self-shielded FCAW-S wires that require no external shielding gas. Eliminating the flowmeter reduces feeder weight and complexity for these applications.
What is the maximum cored wire diameter the K4267-5 handles?
The LN-25X Extra Torque K4267-5 feeds flux-cored wire up to 3/32 in. (2.4 mm). The extra-torque motor provides the drive force needed for heavy cored wire through long conduit assemblies without slipping or bird-nesting.
Does the K4267-5 support CrossLinc voltage control?
Yes. The K4267-5 includes CrossLinc technology, which transmits voltage control signals through the existing weld cable to the power source. CrossLinc is active when paired with a compatible Lincoln power source such as FLEXTEC 450/500 or Power Wave 455M/S500.
Is the Tweco connector on the K4267-5 compatible with Lincoln Magnum PRO guns?
The K4267-5 ships with a Tweco-type gun connector. Lincoln Magnum PRO guns use a Twistmate/Dinse connector standard. An adapter can be used to connect Magnum PRO guns to the Tweco receptacle, or use Tweco-termination guns natively. For direct Magnum PRO compatibility without adapters, specify the K4267-4 Twistmate/Dinse configuration.