Miller Millermatic 252 MIG Welder, 30-300A, MIG/Flux-Cored, Single-Phase, 907321
The Miller Millermatic 252 is a single-phase MIG welder for MIG and flux-cored welding with a 30-300 A output range, covering steel, stainless and aluminum from 22 gauge to 1/2 in. It is rated 200 A at 24 V and 60% duty cycle, rides on factory-installed running gear with a cylinder rack, and comes with a 15 ft MIG gun, regulator and work cable.
The machine also carries a 250 A rating at a 40% duty cycle, with 38 V maximum open-circuit voltage and 50-700 IPM (1.3-17.8 m/min) wire feed speed. It feeds .023-.045 in. solid and stainless wire and .030-.045 in. flux-cored wire through a heavy-duty two-roll aluminum drive with dual-groove, reversible rolls. Line voltage compensation keeps output consistent when input varies within 10%, Active Arc Stabilizer smooths starts, and Fan-On-Demand runs only when needed to cut noise and energy use.
For aluminum welding, Spoolmate 200, Spoolmatic and XR push-pull guns connect directly without an adapter, and Auto-Gun Detect recognizes which gun is in use, whether MIG, spool or push-pull, and loads its presets. Voltage and wire feed speed are set on digital meters, and the stitch, spot, burnback and preflow/postflow timers are preset separately for MIG and spool use. The welder weighs 205 lbs (93 kg), measures 30 x 19 x 40 in. (H x W x D) and suits fabrication, maintenance and repair, farm and light industrial work.
Highlights
30-300 A output; 200 A at 24 V, 60% duty cycle
Single-phase input: 208/240 V or 230/460/575 V, 60 Hz
Welds 22 gauge to 1/2 in. steel, stainless and aluminum
Direct-connect Spoolmate 200, Spoolmatic and XR push-pull guns, no adapter required
Auto-Gun Detect and independent MIG and spool timers
Running gear with cylinder rack; 205 lbs (93 kg)
Specifications
Brand | Miller |
Manufacturer part number | 907321 |
Processes | MIG (GMAW), flux-cored (FCAW) |
Input power | 208/240 V or 230/460/575 V, single-phase, 60 Hz |
Output range | 30-300 A |
Rated output | 200 A at 24 V, 60% duty cycle |
Max open-circuit voltage | 38 V |
Wire feed speed | 50-700 IPM (1.3-17.8 m/min) |
Solid / stainless wire | .023-.045 in. (0.6-1.2 mm) |
Flux-cored wire | .030-.045 in. (0.8-1.2 mm) |
Material thickness | 22 gauge to 1/2 in. |
Wire drive | Two-roll aluminum, dual-groove reversible drive rolls |
Aluminum guns | Direct-connect Spoolmate 200, Spoolmatic or XR push-pull |
Weight | 205 lbs (93 kg) |
Dimensions (H x W x D) | 30 x 19 x 40 in. |
What's in the box
15 ft (4.6 m) MIG gun (250A)
10 ft (3 m) work cable with clamp
10 ft (3 m) industrial power cord (with plug on 208/240 V models)
Argon/CO2 gas regulator and hose
.030/.035 in. reversible dual-groove drive rolls
Factory-installed running gear with cylinder rack
Extra contact tips
Good to know
Check the input power (voltage, phase and amperage) against your supply before you order.


