OMTech K40+ 45W
#6 in CO2Full review
A low cost CO2 starter for tinkerers who want acrylic and glass work on a budget and don’t mind hands on setup. Its small bed rules out signs.
Amazon $769.99$769.99
The OMTech K40+ 45W rates 4.0 among CO2 laser engravers; the Atomstack A40 Pro V2 rates 3.8 among diode ones. The Atomstack A40 Pro V2 costs $50 less ($719.99 vs $769.99).
Atomstack A40 Pro V2
#5 in DiodeFull review
A cheap route to serious diode cutting power for a garage or shop with good ventilation. Not for a shared living space without an enclosure.
Amazon $719.99$719.99
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.
Scores side by side
These two sit in different laser type classes (CO2 and diode), and each is scored against the reference points for its own class, so a rating says how well each does among its own laser type peers. How we rank explains each factor.
| Factor weight | OMTech K40+ 45W | Atomstack A40 Pro V2 |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Value 35% | 100 $17.11 per optical watt ($769.99, 45 W) | 100 $15 per optical watt ($719.99, 48 W) |
| Work area 15% | 1 305 x 203 mm work area | 96 385 x 400 mm work area |
| Features 30% | 55 enclosed, air assist | 25 air assist |
| Warranty 20% | 100 2-year warranty | 50 1-year warranty |
Specifications
| OMTech K40+ 45W | Atomstack A40 Pro V2 | |
|---|---|---|
| Laser | ||
| Type | CO2 | Diode |
| Optical power | 45 W | 48 W |
| Work area | 305 x 203 mm | 385 x 400 mm |
| Maximum speed | 300 mm/s | 500 mm/s |
| Safety class | - | Class 4 |
| Features | ||
| Enclosed | Yes | No |
| Camera | - | No |
| Air assist | Yes | Yes |
| Warranty | 2 years | 1 year |