Miller Maxstar 400 DC TIG Welder – 3-400A Amp Range, P/N 951692

Description

Need to eliminate torch overheating during heavy stainless vessel welding? The Miller Maxstar 400 DC TIG welder Runner package (P/N 951692) combines a 400-amp industrial inverter with a high-capacity Coolmate 3.5 water cooler on a mobile four-wheel running gear cart. Manual TIG welding at 300 to 400 amps generates intense heat that melts air-cooled torches within minutes. This complete Runner package equips your shop with the 400-amp Auto-Line inverter, a 3.5-gallon Coolmate water cooler, and an industrial running gear cart.

The Coolmate 3.5 closed-loop water circulator pumps high-flow coolant through torch lines, keeping torch heads cool during continuous multi-pass structural weldments. Auto-Line technology accepts three-phase power from 208V to 575V, holding stable arc voltage across long cable runs. The heavy four-wheel cart accommodates large shielding gas cylinders, allowing fabrication crews to wheel the entire 400-amp welding station across factory floors with ease.

Core Mechanical Specifications of Miller Maxstar 400 Runner

• Complete Water-Cooled Runner Package: Bundles Maxstar 400, Coolmate 3.5 cooler, running cart, and gas cylinder rack.
• Coolmate 3.5 High-Capacity Water Cooler: Features a 3.5-gallon reservoir and high-efficiency radiator to dissipate intense torch heat.
• 3-400A Industrial Operating Window: Supplies high current for 1/2-inch plate down to 3 amps for micro-thin repairs.
• Auto-Line 208V to 575V Universal Input: Connects to single-phase or three-phase industrial power drops automatically.
• Rated 400A Output at 100% Duty Cycle: Maintains steady arc deposition on structural steel assemblies without thermal trip cutouts.
• High-Speed Pulse TIG up to 500 Hz: Controls heat input to narrow the heat-affected zone and prevent burn-through on thin alloy sheets.
• Industrial Four-Wheel Cart Platform: Transports the complete welding station and two full-size shielding gas cylinders easily.

Mechanical Advantages for Commercial Fleets

This water-cooled TIG station gives industrial production shops continuous high-amperage arc operation without thermal handling limits.

• Water cooling keeps torch neck parts cool, extending copper collet and gas lens consumable life under high duty cycles.
• Integrated cart platform carries all cables, hoses, and gas cylinders, eliminating tangled leads around welding tables.
• Dual high-speed cooling fans protect internal inverter modules from heat breakdown during full-shift production runs.

Acreage Productivity & Deck Clearance

The cart base measures 43 inches long by 28 inches wide, creating a mobile workstation that positions the display at natural eye height for fast adjustments.

Factory Warranty Protection & Service Care

• Miller Electric backs the Maxstar 400 powerhead and Coolmate 3.5 water cooler with a 3-Year True Blue warranty.
• Authorized Miller service centers provide nationwide technical support and genuine replacement parts.

Check water cooler reservoir levels weekly with approved low-conductivity coolant, flush cooling channels annually, and clean wire drive rolls with a nylon brush. Order the Miller Maxstar 400 DC TIG welder from Mulmotor.com for guaranteed factory-fresh units, complete manufacturer warranty coverage, and dedicated commercial equipment support.