Miller Spectrum 625 X-TREME

Last updated: November 2, 2026

Miller Spectrum 625 X-TREME
3.6/5#4 of 12 in up to 45 A plasma cutters
3.6

A light, dual voltage Miller cutter for shops and job sites that cut up to 5/8 in steel day after day. Worth it for buyers who value Miller build and dealer service; hobby users can pay much less.

  • 40 AOutput
  • 5/8 inRated cut
  • 60% at 40 A, 40 °CDuty cycle
  • 120/240 VInput
Check price at Amazon$2,917.20Check price at Cyberweld$2,508

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Cuts 5/8 in steel cleanly on 240 V and 3/8 in on a household outlet
  • Runs 60% of the time at full 40 A, so long cuts rarely stop to cool down
  • At 21 lb it carries on a shoulder strap
  • Pilot arc restrikes by itself on expanded metal and grates
Cons
  • Costs about twice as much as other 40 A pilot arc cutters
  • Three year warranty, shorter than some budget brands offer

The Miller Spectrum X-TREME family

Every Miller Spectrum X-TREME model we rank, smallest first. Ratings compare each against its own size.

ModelOutputRatingPrice
Miller Spectrum 375 X-TREME30 A2.9/5$1,940
Miller Spectrum 625 X-TREME (this one)40 A3.6/5$2,508

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Model number907579
Cutting
Input voltage120/240 V
Maximum output40 A
Rated cut, mild steel5/8 in
Sever cut, mild steel7/8 in
Rated duty cycle60% at 40 A, 40 °C
Pilot arcYes
Air and build
Air supply6 cfm, 90 psi
Weight21 lb
Warranty3 years
Released2011-11

Alternatives in this size

Compare

Compare the Miller Spectrum 625 X-TREME with any other plasma cutter →

More from Miller: every Miller product ranked.