Everlast Cyclone 312i
#2 in 240 VFull review
The most powerful single-phase MIG in the Everlast line, for serious fabricators and farm shops welding thick steel. It undercuts industrial 300 A machines by a wide margin.
Everlast $1,699$1,699
The Everlast Cyclone 312i is the better MIG welder overall, rated 4.0 to 2.6. The Everlast Cyclone 312i leads on value, warranty and processes. The Everlast Cyclone 312i costs $2,653 less ($1,699 vs $4,352).
Miller Millermatic 255
#7 in 240 VFull review
A professional shop MIG for fabricators who weld thick steel and aluminum all day. It is overkill for weekend repairs.
Amazon $4,352$4,352
Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Everlast Cyclone 312i for value ($5.39 per amp ($1,699, 315 A maximum) vs $12.43 per amp ($4,352, 350 A maximum)), warranty (5-year warranty on the machine vs 3-year warranty on the machine) and processes (MIG, flux-core, stick, lift TIG, takes a spool gun for aluminum vs MIG, flux-core, takes a spool gun for aluminum).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 240 V MIG welder; a clear win is highlighted. How we rank explains each one.
| Factor weight | Everlast Cyclone 312i | Miller Millermatic 255 |
|---|---|---|
| Overall rating | 4.0/5 | 2.6/5 |
| Value 30% | 51 $5.39 per amp ($1,699, 315 A maximum) | 0 $12.43 per amp ($4,352, 350 A maximum) |
| Duty cycle 20% | 38 35% at full output (315 A) | 15 60% at 230 A, about 26% at full output |
| Processes 15% | 100 MIG, flux-core, stick, lift TIG, takes a spool gun for aluminum | 60 MIG, flux-core, takes a spool gun for aluminum |
| Weight 10% | 75 68 lb | 60 84 lb |
| Warranty 25% | 100 5-year warranty on the machine | 50 3-year warranty on the machine |
Specifications
| Everlast Cyclone 312i | Miller Millermatic 255 | |
|---|---|---|
| Output | ||
| Input voltage | 240 V | 240 V |
| Maximum output | 315 A | 350 A |
| Rated duty cycle | 35% at 315 A, 40 °C | 60% at 230 A, 40 °C |
| Thickest steel, one pass | 0.5 in | 0.5 in |
| Inverter | Yes | Yes |
| Processes and wire | ||
| Gas MIG | Yes | Yes |
| Stick | Yes | No |
| TIG | Lift TIG | No |
| Spool gun ready | Yes | Yes |
| Wire sizes | 0.024 to 0.062 in | 0.023 to 0.045 in |
| Largest spool | 44 lb | - |
| Synergic settings | Yes | Yes |
| Build | ||
| Weight | 68 lb | 84 lb |
| Warranty | 5 years | 3 years |
| Released | - | 2019-02 |