The Lincoln Magnum PRO Robotic One-Pak 120ID/12L (K3359-120ID/12L) is a complete, ready-to-weld robotic MIG gun package engineered for robotic welding cells. It features a single fixed Tool Center Point (TCP) across all consumable configurations, a cable system built to exceed industry durability standards, and interchangeable 350A/550A consumables — making it a maintenance-friendly choice for automated production environments.
| Model | Magnum PRO Robotic One-Pak 120ID/12L |
|---|---|
| Part Number | K3359-120ID/12L |
| Amperage Rating | 350A / 550A (interchangeable consumables; rated by expendable configuration) |
| Cable Length / ID | 120ID inner diameter, 12L cable configuration |
| Cooling Method | Air-cooled (standard robotic gun configuration) |
| Wire Diameter Range | Matched to consumable configuration — 0.035–0.045 in. for standard; wider range with accessory liners |
| Connector / Interface | HexConnect Gun Bushing — full-face contact for maximum electrical conductivity |
| Consumables Family | Magnum PRO Robotic — 350A and 550A rated expendables are interchangeable across all gun models in this series |
| TCP Design | Single fixed Tool Center Point maintained across 350A and 550A expendable changes |
| Product Type | Robotic welding gun — One-Pak complete assembly |
The Magnum PRO Robotic One-Pak is built for automated welding cells where arc consistency, consumable reliability, and minimal re-teaching after maintenance are critical production requirements.
- Robotic MIG welding cells — primary gun for Lincoln-compatible robotic welding systems in automotive, heavy fabrication, and general manufacturing environments.
- High-volume production welding — the One-Pak configuration delivers everything needed for immediate installation and operation in a single package, minimizing setup time and configuration errors.
- Applications requiring consistent TCP — because changing between 350A and 550A expendables does not alter the robot's TCP, robots do not require re-teaching after consumable changes, a significant time and productivity advantage in high-uptime environments.
- High-durability environments — the cable system exceeds industry durability standards by a factor of two, making it suited to environments with frequent flexing, cable stress, or harsh conditions.
- Tight-access weld joints — the extended mounting bracket design maximizes clearance for weld joints in confined areas, common in automotive body and chassis assembly.
The Magnum PRO Robotic gun family uses a unified consumables platform — 350A and 550A rated expendables are interchangeable across all gun models in the series. This simplifies parts inventory management for robotic welding cells running multiple guns.
- Contact Tips (350A): Magnum PRO Robotic 350A-rated Copper Plus contact tips — large-mass design for heat dissipation in high-deposition welding.
- Contact Tips (550A): 550A-rated tips for higher-amperage robotic applications — same mounting system, no TCP change when swapping.
- Nozzles: Robotic gun nozzles sized for the 120ID gun body — flush and recessed configurations available for varying spatter environments.
- Liners: Straight liners sized to wire diameter; robotic applications typically use 0.035–0.045 in. solid wire liners for steel applications.
- HexConnect Bushing: Replaceable HexConnect gun bushing for maintaining optimal electrical conductivity at the gun-to-robot interface.
For robotic gun consumables and replacement parts, browse WeldingMart Torch Tips & Nozzles. View the full Lincoln robotic and MIG gun range at the Magnum PRO Guns & Torches hub.
WeldingMart is an authorized Lincoln Electric distributor, carrying the full Magnum PRO Robotic gun line with genuine OEM warranty coverage. We serve both light-industrial and full-scale automated manufacturing customers.
- Genuine OEM equipment: Authentic Lincoln Electric robotic guns with factory warranty — not gray-market or third-party imitations.
- Application expertise: Our team can help match the correct One-Pak configuration to your robot model, power source, and wire type requirements.
- Consumables supply: We stock Magnum PRO Robotic expendables — tips, nozzles, and liners — to support ongoing production needs.
- Fast US shipping: In-stock orders ship within one business day from our US warehouse.
Browse the full Magnum PRO Guns & Torches collection to explore Lincoln's complete range of MIG guns, robotic packages, and accessories.