Thermal Dynamics Cutmaster 30+
#9 in Up to 45 AFull review
A light, dual voltage cutter for home shops and auto body work up to 3/8 in steel, from an industrial brand with wide dealer support.
Amazon $1,450$1,450
2.3/5
For occasional auto body, HVAC and thin sheet cutting on a 120 V outlet. Anyone cutting plate should buy a larger dual voltage machine.
- 20 AOutput
- 3/16 inRated cut
- 35% at 20 ADuty cycle
- 120 VInput
Check price at Amazon$399.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs on a standard household outlet
- Light enough to carry with the included strap
- Enough for auto body panels, ductwork and thin sheet up to 3/16 in
Cons
- Only 20 A, so 1/4 in is the most it gets through
- High frequency start can upset nearby electronics
- One year warranty on the machine and 90 days on the torch
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 number | 255 |
|---|---|
| Cutting | |
| Input voltage | 120 V |
| Maximum output | 20 A |
| Rated cut, mild steel | 3/16 in |
| Sever cut, mild steel | 1/4 in |
| Rated duty cycle | 35% at 20 A |
| Arc start | High frequency |
| Air and build | |
| Air supply | 5.5 cfm, 90 psi |
| Weight | 16.4 lb |
| Warranty | 1 year |
Alternatives in this size
Hobart AirForce 12ci
#10 in Up to 45 AFull review
For sheet metal, HVAC and body work where carrying a compressor is not practical. Anyone with a compressor gets far more cutting for the money from a 30 to 40 A machine.
Amazon $1,012.99 Cyberweld $1,011$1,011
Miller Spectrum 375 X-TREME
#11 in Up to 45 AFull review
A small, light Miller cutter for sheet metal, HVAC and body work up to 3/8 in, on either voltage. It suits buyers who want a big-brand machine and dealer support over the lowest price.
Amazon $2,141 Cyberweld $1,940$1,940
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