Miller Trailblazer® 302 Air Pak™ Welder/Generator with Rotary Screw Air Compressor

Item # 907549001

Powerful all-in-one tool is designed for repair and construction with unbeatable multi-process weld quality, integrated rotary screw air compressor, and 13,000 watts of generator power for job site tools.

  • Four Tools In One:  Professional welding performance in all processes with the best welding arc in its class. 13,000 watt generator, 31 CFM rotary screw air compressor, and 12-24-volt battery charger/ jump starter.

  • Superior Arc Performance:  The best arc performance and multi-process versatility: Four preset DIG settings (Stick) to make the arc softer or stiffer depending on electrode and operator preference. Adaptive Hot Start (Stick) ensures easy arc starts regardless of operator technique. Excellent MIG/FCAW arc performance to run smoothly with solid and flux-cored wires. Lif Arc, TIG with Auto-Crater and Auto-Stop. Lift Arc minimizes/eliminates contamination when starting, Auto-Stop prevents arc flare at the arc end and Auto-Crater eliminates the need for a remote control by automatically ramping down amperage at the end of a weld to fill in the crater. DC Stick: 25-300 A DC TIG: 10-300 A AC TIG/Stick: 10-225 A MIG/FCAW: 13-35 V, 350 A

  • Independent Weld/Generator Power:  Delivers an industry-leading 13,000 watts of peak generator power independent of weld settings—enough to power a Spectrum® 875 plasma cutter, and provide air for plasma cutting at the same time (rated 5/8″ mild steel).

  • Rotary Screw Compressor:  Quiet and durable rotary-screw compressor delivers 31 CFM at 80-160 psi of air at 100% duty cycle while rated at 104° F.  It offers an average of three times the service life of traditional reciprocating compressors. Produces air when you need it; no more down time waiting for an external tank to fill. Airflow can be selected depending on tool requirements. Front panel air pressure adjustment makes it simple to dial in the correct air pressure for specific applications (80-160 psi).

  • A Battery Charger/Jump Starter:  Selectable 12- or 24-volt battery charging capability providing up to 450 amps for jump-starting. Conveniently located on the front panel.

  • Lower Fuel Consumption and Emissions:  Air compressor, welder and generator are all run with one engine, reducing emissions and reducing fuel consumption up to 50%.

  • Requires Half the Space:  Takes only half the bed space of a separate engine-driven air compressor and welder, freeing up 50% more room on your truck for equipment and supplies. The Trailblazer 302 Air Pak offers up to 25% less axle weight for payload advantage.

  • Available on a trailer mount





Field Construction
Maintenance and Repair


Compressed Air
Air Carbon Arc Cutting and Gouging (CAC-A)
Flux Cored (FCAW)
Plasma (PAC)
Stick (SMAW)

Weldable Metals

Stainless Steel

Fuel Type


Amp / Volt Ranges

Battery charge / crank assist: 12 / 24 V
CC/AV (Stick/TIG): 10 -225 A
CC/CV (Stick/TIG): 10 – 300 A
CV/DC (MIG/FCAW): 13 – 35 A

Rated Output at 104° F

Battery charge: 10 – 75 A
CC/AC (Stick/TIG): 200 A at 25 V, 60% duty cycle
CC/DC (Stick/TIG): 280 A at 32 V, 100% duty cycle
Crank Assist: 450 A, 12 V; 350 A, 24 V
CV/DC (MIG/FCAW): 300 A at 32 V, 100% duty cycle; 350 A at 32 V, 60% duty cycle

Single-Ph Generator Power

Continuous: 11,000 watts, 120/240V, 100/50 A, 60 Hz
Peak: 13,000 watts

Sound Levels at 23 Ft

2,400 rpm (idle): 73.4 dB (98.4 Lwa)
3,000 rpm: 76.5 dB (101.5 Lwa)
3,600 rpm: 81.2 dB (106.6 Lwa)

Air Compressor Model


Air Compressor Features

Oil change intervals: 500 hours
Rotary Screw with electric clutch for on/off

Free Air Delivery

22 cfm (0.62 m³/min) at 2,400 rpm (idle)
28 cfm (0.79 m³/min) at 3,000 rpm
31 cfm (0.88 m³/min) at 3,600 rpm

Working Pressure Constant

80–160 psig

Air Compressor Duty Cycle


Air Compressor Oil Capacity

1.75 qt

Auto Compressor Shutdowns

High pressure (160 psi)

Engine Model

Kohler CH750


27 hp at 3,600 rpm

Engine Type

Overhead valve
Industrial air-cooled

Weld Speed

3,600 / 3,000 rpm

Idle Speed

2,400 rpm

Fuel Capacity

12 gal

Oil Capacity

1.75 qt

Standard Shutdowns

Low oil pressure


D: 59.625 in
H (to top of exhaust): 34.5 in
H: 28 in
W: 20 in


771 lbs


Optional Trailer Mount