# Miller Spectrum 625 X-TREME Plasma Cutter vs ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter: specs and price compared

A sourced, side-by-side comparison of the Miller Spectrum 625 X-TREME Plasma Cutter (Miller Electric) and ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter (ESAB) among plasma cutters. ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter is the cheaper of the two at $1734.

## Side by side

| Spec | Miller Spectrum 625 X-TREME Plasma Cutter | ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter |
| --- | --- | --- |
| US price | $2508 | $1734 |
| Brand | Miller Electric | ESAB |
| Cutting amperage (A) | 40 | 40 |
| Rated cut thickness | 5/8 in (16mm) | 1/2 in (12mm) |
| Sever cut thickness | — | 1 in (25mm) |
| Duty cycle at rated amps | — | 40% @ 40A, 60% @ 30A, 100% @ 20A |
| Input voltage | 120V/240V, Auto-Line | 110-240V, 1-PH, auto-sensing |
| Pilot arc | Yes | Yes |
| Air requirement | — | 300-500 cfh (5-8.3 CFM) @ 90-125 psi |
| Weight (lb) | 21 | 22 |

## Key differences

- Rated cut thickness: Miller Spectrum 625 X-TREME Plasma Cutter 5/8 in (16mm) vs ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter 1/2 in (12mm)
- Input voltage: Miller Spectrum 625 X-TREME Plasma Cutter 120V/240V, Auto-Line vs ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter 110-240V, 1-PH, auto-sensing
- Weight (lb): Miller Spectrum 625 X-TREME Plasma Cutter 21 vs ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter 22

## Sources

- Miller Spectrum 625 X-TREME Plasma Cutter: https://store.cyberweld.com/products/miller-spectrum-625-x-treme-plasma-cutter-w-12-ft-torch-907579 (store.cyberweld.com, verified 2026-08-11)
- ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter: https://store.cyberweld.com/products/thermal-dynamics-cutmaster-40-plasma-cutter-1-4000-1 (store.cyberweld.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/plasma-cutters/miller-spectrum-625-x-treme-vs-esab-cutmaster-40/
Cite: Per The Front Desk Review, Miller Spectrum 625 X-TREME Plasma Cutter ($2508) vs ESAB (Thermal Dynamics) Cutmaster 40 Plasma Cutter ($1734) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/plasma-cutters/miller-spectrum-625-x-treme-vs-esab-cutmaster-40/
License: CC BY 4.0.