The Lincoln Magnum PRO 500 Water-Cooled Welding Gun (K4522-2-10-564) is a 500-amp, water-cooled MIG gun with a 15 ft cable and 10-backend connection, engineered for extreme-duty and HyperFill dual-wire applications. At 100% duty cycle on 90/10 mixed gas, it is Lincoln's highest-output hand-held MIG gun — built for heat, continuous arc time, and deposition rates that exceed air-cooled gun limits.
| Model | Magnum PRO 500 Water-Cooled |
|---|---|
| Part Number | K4522-2-10-564 |
| Amperage Rating | 500A (100% duty cycle, 90/10 mixed gas) |
| Cable Length | 15 ft (4.6 m) |
| Cooling Method | Water-cooled (requires external water cooler — e.g., Lincoln Cool Arc 55S K3086-2) |
| Wire Diameter Range | 0.035–0.045 in. (primary); 5/64 in. (1.98 mm) liner included for HyperFill .035–.040 applications |
| Connector / Backend | 10-backend configuration |
| Consumables Family | K4522 / Magnum PRO 500A Water-Cooled series — KP4522 nozzles, KP4481 HyperFill diffuser, HyperFill contact tips (KP4482) |
| HyperFill Support | Yes — ships with 5/64 in. cable liner (KP44-564-15) for HyperFill .035–.040 dual-wire applications |
| Gooseneck Design | 500A water-cooled gooseneck — keeps nozzle cool in high-heat applications |
| Welding Processes | MIG (GMAW), Pulsed MIG, HyperFill (dual wire), Flux-Cored |
The Magnum PRO 500 Water-Cooled is designed for the most demanding MIG welding applications where amperage, duty cycle, and deposition rate requirements exceed what any air-cooled gun can sustain. If you are running continuous multi-pass welds, heavy structural work, or Lincoln HyperFill, this is the gun built for those conditions.
- HyperFill dual-wire welding — the K4522-2-10-564 ships with the 5/64 in. liner and is designed to support Lincoln's HyperFill process, which runs two wires simultaneously for dramatically increased deposition rates on heavy sections.
- Heavy structural fabrication — multi-pass fillet and groove welds on plate and structural sections where continuous 500A welding is required without duty cycle interruptions.
- High-production manufacturing — automated or semi-automated production lines running continuous welding cycles where gun heat buildup with air-cooled guns causes forced production stops.
- Pressure vessel and tank fabrication — high-heat, high-deposition welding on thick-wall cylindrical and pressure-rated assemblies.
- Offshore and heavy equipment manufacturing — applications where maximum wire deposition per hour is a production-cost driver and thermal management is essential.
The K4522-2-10-564 uses the Magnum PRO 500A Water-Cooled consumables family. These consumables are engineered for the thermal demands of 500A continuous welding — the water-cooled gooseneck design removes heat from the nozzle zone that would otherwise accelerate spatter adhesion and tip burnback at high amperages.
- HyperFill Contact Tips (KP4482): HyperFill-specific tips in .035 size (KP4482-035) — required for HyperFill dual-wire applications. Do not substitute standard tips for HyperFill operation.
- HyperFill Diffuser (KP4481-1): Specialized diffuser for HyperFill wire configuration — included in the HyperFill system; also available individually.
- Nozzle — 1/8 in. Recess (KP4523-1-75R): Specific nozzle for HyperFill applications; also available in other configurations for standard 500A welding.
- Cable Liner — 5/64 in. (KP44-564-15): 15 ft liner for HyperFill .035–.040 wire; included with the K4522-2-10-564 gun.
- Standard Magnum PRO 500A Tips: Large-diameter, large-mass Copper Plus tips for standard 500A GMAW operation (non-HyperFill).
- Water Hose Kit (K4544-7): 7 ft water hose kit for connecting the gun to an external water cooler (e.g., Cool Arc 55S K3086-2). Water cooler sold separately.
Browse 500A-compatible consumables and accessories at WeldingMart Torch Tips & Nozzles. For the full Magnum PRO gun lineup, visit the Magnum PRO Guns & Torches hub.
WeldingMart is an authorized Lincoln Electric distributor with the product knowledge and inventory depth to support Lincoln's most advanced welding systems — including the Magnum PRO 500 Water-Cooled and full HyperFill system configurations.
- Genuine OEM product: 100% authentic Lincoln Electric equipment with full manufacturer warranty — no gray-market substitutes.
- Complete system support: We can source the K4522-2-10-564 alongside the Cool Arc 55S water cooler, water hose kit, HyperFill consumables, and supporting power source and wire feeder components.
- Expert guidance: Our team can help you specify the complete HyperFill or high-amperage MIG system — gun, cooler, feeder, power source — based on your production requirements.
- 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 the complete Lincoln MIG gun lineup, from 100L guns to the 500A water-cooled platform.