Thermal Dynamics Cutmaster 50+
#13 in Over 45 AFull review
A dual voltage 50 A cutter for farm and fabrication shops that want thick-plate capacity and a CNC port in one machine.
Amazon $2,700$2,700
The Thermal Dynamics Cutmaster 50+ is the better plasma cutter overall, rated 3.5 to 3.4. The Thermal Dynamics Cutmaster 50+ leads on cut and pilot arc. The PrimeWeld CUT50 wins on value and duty cycle. The PrimeWeld CUT50 costs $2,411 less ($289 vs $2,700).
PrimeWeld CUT50
#18 in Over 45 AFull review
For a hobbyist who cuts clean steel up to 1/2 in now and then and wants the lowest price. Spend more on a pilot arc model for rusty or expanded metal.
Amazon $289$289
Prices were last checked November 2, 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 Thermal Dynamics Cutmaster 50+ for cut (1 in rated cut on mild steel vs 0.472 in rated cut on mild steel) and pilot arc (pilot arc vs no pilot arc).
- Choose the PrimeWeld CUT50 for value ($612.29 per inch of rated cut ($289, 0.472 in) vs $2,700 per inch of rated cut ($2,700, 1 in)) and duty cycle (60% at full output (50 A) vs 50% at full output (50 A)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 45 A plasma cutter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Thermal Dynamics Cutmaster 50+ | PrimeWeld CUT50 |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 30% | 36 $2,700 per inch of rated cut ($2,700, 1 in) | 86 $612.29 per inch of rated cut ($289, 0.472 in) |
| Cut 20% | 67 1 in rated cut on mild steel | 0 0.472 in rated cut on mild steel |
| Duty cycle 15% | 75 50% at full output (50 A) | 100 60% at full output (50 A) |
| Pilot arc 10% | 100 pilot arc | 0 no pilot arc |
| Warranty 25% | 50 3-year warranty on the machine | 50 3-year warranty on the machine |
Specifications
| Thermal Dynamics Cutmaster 50+ | PrimeWeld CUT50 | |
|---|---|---|
| Cutting | ||
| Input voltage | 120/240 V | 120/240 V |
| Maximum output | 50 A | 50 A |
| Rated cut, mild steel | 1 in | 0.472 in |
| Sever cut, mild steel | 1 1/4 in | 0.63 in |
| Rated duty cycle | 50% at 50 A | 60% at 50 A, 25 °C |
| Pilot arc | Yes | No |
| Arc start | - | High frequency |
| Air and build | ||
| Air supply | 8.3 cfm, 90 psi | 5 cfm, 75 psi |
| CNC port | Yes | - |
| Weight | 38.6 lb | 22.5 lb |
| Warranty | 3 years | 3 years |
| Released | 2024-10 | - |