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
2.9/5
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.
- 30 AOutput
- 3/8 inRated cut
- 40% at 30 A, 40 °CDuty cycle
- 120/240 VInput
Check price at Amazon$2,141Check price at Cyberweld$1,940
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Plugs into a household outlet or a 240 V outlet with the included plugs
- At 19 lb with a shoulder strap and X-CASE it is easy to carry around a job
- Pilot arc restrikes by itself on expanded metal and grates
Cons
- Costs about twice as much as other 3/8 in cutters
- Full 30 A output runs only 40% of the time
- Only 3/8 in rated cut, so thicker steel is slow going
The Miller Spectrum X-TREME family
Every Miller Spectrum X-TREME model we rank, smallest first. Ratings compare each against its own size.
| Model | Output | Rating | Price |
|---|---|---|---|
| Miller Spectrum 375 X-TREME (this one) | 30 A | 2.9/5 | $1,940 |
| Miller Spectrum 625 X-TREME | 40 A | 3.6/5 | $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 number | 907529 |
|---|---|
| Cutting | |
| Input voltage | 120/240 V |
| Maximum output | 30 A |
| Rated cut, mild steel | 3/8 in |
| Sever cut, mild steel | 5/8 in |
| Rated duty cycle | 40% at 30 A, 40 °C |
| Pilot arc | Yes |
| Air and build | |
| Air supply | 5 cfm, 90 psi |
| Weight | 19 lb |
| Warranty | 3 years |
| Released | 2011-11 |
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
Forney Easy Cut 255
#12 in Up to 45 AFull review
For occasional auto body, HVAC and thin sheet cutting on a 120 V outlet. Anyone cutting plate should buy a larger dual voltage machine.
Amazon $399.99$399.99
Compare
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