OMTech 40W CO2 vs K40 CO2 — Which Should You Buy?

Side-by-side specs, settings, and decision guide. Both have community-tested settings for 41 shared materials.

OMTech 40W CO2: $599 vs K40 CO2: $399 — prices as of 2026, check retailer for current pricing.

Where to buy

Buy the OMTech 40W CO2 — check current price & availability

Buy on Amazon →

Affiliate link — we may earn a small commission at no extra cost to you.

Where to buy

Buy the K40 CO2 — check current price & availability

Buy on Amazon →

Affiliate link — we may earn a small commission at no extra cost to you.

Which one should you buy?

Pick the OMTech 40W CO2 if you want: more cutting power (40W vs 35W); native LightBurn support (industry-standard).

OMTech 40W CO2

Price
$599

Power
40W

Laser Type
co2

Work Area
300×200mm

Software

LightBurn

Buy OMTech 40W CO2 →

K40 CO2

Price
$399

Power
35W

Laser Type
co2

Buy K40 CO2 →

90 settings for OMTech 40W CO279 settings for K40 CO2

Settings Comparison

Material · Operation	OMTech 40W CO2	K40 CO2
2mm Basswood Plywoodcut	28 mm/s · 32% · air assist	—
3mm Baltic Birch Plywoodcut	—	18 mm/s · 80% · 2× passes · air assist
3mm Basswood Plywoodcut	20 mm/s · 40% · air assist	20 mm/s · 55%
3mm Black Acryliccut	12 mm/s · 55% · air assist	10 mm/s · 60%
3mm Cherry Plywoodcut	18 mm/s · 46% · air assist	—
3mm Clear Acryliccut	12 mm/s · 55% · air assist	6 mm/s · 90% · air assist
3mm Hardboard HDFcut	12 mm/s · 55% · air assist	—
3mm Maple Plywoodcut	16 mm/s · 48% · air assist	—
3mm MDFcut	15 mm/s · 45% · air assist	12 mm/s · 65%
3mm Mirrored Acryliccut	12 mm/s · 55% · air assist	—
3mm Walnut Plywoodcut	18 mm/s · 45% · air assist	16 mm/s · 72%
5mm Plywoodcut	10 mm/s · 60% · 2× passes · air assist	—
6mm Baltic Birch Plywoodcut	—	10 mm/s · 85% · 2× passes
6mm Basswood Plywoodcut	8 mm/s · 65% · 2× passes · air assist	—
6mm Birch Plywoodcut	7 mm/s · 70% · 2× passes · air assist	—
6mm Clear Acryliccut	6 mm/s · 72% · 2× passes · air assist	—
6mm MDFcut	8 mm/s · 62% · 2× passes · air assist	8 mm/s · 88% · 2× passes
9mm Birch Plywoodcut	4 mm/s · 78% · 3× passes · air assist	—
Acrylic Feltcut	55 mm/s · 28%	55 mm/s · 28%
Acryliccut	12 mm/s · 70% · air assist	—
Aldercut	250 mm/min · 95% · 2× passes · air assist	—
Bamboo 3mmcut	18 mm/s · 68% · air assist	18 mm/s · 68% · air assist
Bamboocut	250 mm/min · 100% · 2× passes · air assist	16 mm/s · 85% · 2× passes · air assist
Basswoodcut	—	22 mm/s · 70% · air assist
Cardboardcut	60 mm/s · 20%	25 mm/s · 40%
Cardstock 160gsmcut	60 mm/s · 15%	50 mm/s · 12%
Cardstock 300gsmcut	85 mm/s · 18%	85 mm/s · 18%
Cardstockcut	80 mm/s · 12%	30 mm/s · 25%
Cedarcut	400 mm/min · 85% · air assist	—
Cherrycut	250 mm/min · 100% · 2× passes · air assist	—
Chipboard 2mmcut	28 mm/s · 58% · air assist	28 mm/s · 58% · air assist
Copy Paper 80gsmcut	100 mm/s · 12%	100 mm/s · 12%
Cork 3mmcut	22 mm/s · 42%	28 mm/s · 35% · air assist
Cork Sheet 3mmcut	28 mm/s · 35% · air assist	—
Corkcut	—	30 mm/s · 40%
Corrugated Cardboard 4mmcut	22 mm/s · 45%	—
Corrugated Cardboardcut	35 mm/s · 45%	35 mm/s · 45%
Cotton Fabriccut	60 mm/s · 28%	15 mm/s · 45–50% · air assist
Craft Felt 3mmcut	30 mm/s · 35%	—
Denim Fabriccut	—	17 mm/s · 50–55% · air assist
Denimcut	40 mm/s · 38%	—
EVA Foam 3mmcut	40 mm/s · 22%	—
EVA Foam 6mmcut	45 mm/s · 32%	45 mm/s · 32%
Faux Leathercut	35 mm/s · 45% · air assist	35 mm/s · 45% · air assist
Feltcut	800 mm/min · 25%	—
Foam Board 5mmcut	42 mm/s · 35%	42 mm/s · 35%
Genuine Leather (Veg-Tan, ~3mm)cut	—	25 mm/s · 50–60% · air assist
Genuine Leathercut	20 mm/s · 35% · air assist	10 mm/s · 60–65% · air assist
HTV Vinylcut	90 mm/s · 12%	90 mm/s · 12%
Kraft Papercut	80 mm/s · 12%	105 mm/s · 8%
Leathercut	10 mm/s · 50% · air assist	22 mm/s · 65% · air assist
Maplecut	—	10 mm/s · 70–80% · 2× passes
Mylar Stencil 7.5milcut	68 mm/s · 18%	68 mm/s · 18%
Mylar Stencil Film 0.1mmcut	50 mm/s · 20%	—
Oakcut	200 mm/min · 100% · 2× passes · air assist	—
Papercut	100 mm/s · 10%	—
Pinecut	350 mm/min · 90% · air assist	—
Plywoodcut	—	16 mm/s · 85% · 2× passes · air assist
Rubber Stamp Blankcut	—	11 mm/s · 60–65% · air assist
Rubber Stamp Materialcut	—	7 mm/s · 80–85% · air assist
Walnutcut	—	10 mm/s · 70–80% · 2× passes
3mm Basswood Plywoodengrave	300 mm/s · 30%	200 mm/s · 30%
3mm Black Acrylicengrave	200 mm/s · 18%	150 mm/s · 15–20%
3mm Cherry Plywoodengrave	250 mm/s · 28%	—
3mm Clear Acrylic (Cast)engrave	—	390 mm/min
3mm Clear Acrylicengrave	200 mm/s · 20%	100 mm/s · 25–30%
3mm Maple Plywoodengrave	250 mm/s · 30%	360 mm/min
3mm MDFengrave	300 mm/s · 28%	200 mm/s · 15–20%
3mm Mirrored Acrylicengrave	200 mm/s · 20%	360 mm/min
3mm Walnut Plywoodengrave	—	350 mm/s · 20%
6mm Basswood Plywoodengrave	250 mm/s · 35%	—
Acrylic Feltengrave	—	500 mm/s · 5–10%
Acrylicengrave	300 mm/s · 20%	—
Alderengrave	350 mm/min · 55%	—
Anodized Aluminumengrave	200 mm/s · 20% · air assist	250 mm/s · 25%
Bamboo 3mmengrave	—	250 mm/s · 15–20%
Bamboo Cutting Boardengrave	250 mm/s · 35%	220 mm/s · 28%
Bambooengrave	350 mm/min · 60%	—
Basswoodengrave	200 mm/s · 25% · air assist	—
Cardstock 160gsmengrave	300 mm/s · 8%	500 mm/s · 5–8%
Cardstock 300gsmengrave	—	500 mm/s · 5–8%
Cardstockengrave	300 mm/s · 6%	—
Cedarengrave	400 mm/min · 45%	—
Ceramic Tileengrave	200 mm/s · 60%	220 mm/s · 55%
Cherryengrave	350 mm/min · 55%	—
Chipboard 2mmengrave	—	400 mm/s · 15–20%
Copy Paper 80gsmengrave	—	500 mm/s · 5–8%
Cork 3mmengrave	250 mm/s · 22%	250 mm/s · 20%
Corrugated Cardboard 4mmengrave	300 mm/s · 18%	—
Corrugated Cardboardengrave	—	500 mm/s · 10–15%
Cotton Fabricengrave	280 mm/s · 16%	280 mm/s · 16%
Craft Felt 3mmengrave	200 mm/s · 15%	—
Denim Fabricengrave	300 mm/s · 18%	300 mm/s · 18%
Denimengrave	200 mm/s · 20%	—
EVA Foam 3mmengrave	300 mm/s · 8%	—
EVA Foam 6mmengrave	—	500 mm/s · 5–10%
Faux Leatherengrave	—	500 mm/s · 10–15%
Foam Board 5mmengrave	—	500 mm/s · 5–10%
Genuine Leather (Veg-Tan, ~3mm)engrave	—	280 mm/s · 15–22% · air assist
Genuine Leatherengrave	200 mm/s · 25%	180 mm/s · 22%
Glassengrave	200 mm/s · 20%	250 mm/s · 25%
HTV Vinylengrave	—	500 mm/s · 5–8%
Kraft Paperengrave	—	500 mm/s · 8%
Leatherengrave	—	200 mm/s · 18% · 22× passes · air assist
Mapleengrave	350 mm/s · 18% · air assist	220 mm/s · 22–28%
Marble Tileengrave	80 mm/s · 55%	80 mm/s · 55%
Mylar Stencil 7.5milengrave	—	500 mm/s · 5–8%
Oakengrave	300 mm/min · 60%	—
Photopolymer Stamp Blankengrave	150 mm/s · 40%	—
Pineengrave	400 mm/min · 50%	—
Rubber Stamp Blankengrave	200 mm/s · 22%	200 mm/s · 22%
Rubber Stamp Materialengrave	150 mm/s · 50%	120 mm/s · 45%
Rubberengrave	150 mm/s · 35% · air assist	—
Slate (coaster)engrave	—	320 mm/s · 18–25%
Slateengrave	250 mm/s · 65%	200 mm/s · 65%
Stainless Steelengrave	200 mm/s · 65%	200 mm/s · 65%
Walnutengrave	300 mm/s · 20% · air assist	220 mm/s · 22–28%

All OMTech 40W CO2 settings →All K40 CO2 settings →

Ready to buy the OMTech 40W CO2?

Buy on Amazon →

Ready to buy the K40 CO2?

Buy on Amazon →

Frequently Asked Questions

Which is better, the OMTech 40W CO2 or K40 CO2?

It depends on your use case. OMTech 40W CO2 is 40W co2 with 300×200mm bed. K40 CO2 is 35W co2. See the decision guide and side-by-side specs above.

What materials can both the OMTech 40W CO2 and K40 CO2 cut or engrave?

Both machines have community-tested settings for 41 shared materials. The settings table above lists every material with side-by-side speed, power, passes, and air assist values for direct comparison.

Is the OMTech 40W CO2 or K40 CO2 compatible with LightBurn?

The OMTech 40W CO2 works natively with LightBurn. The K40 CO2 uses . LightBurn compatibility may be possible via a community device profile but is not officially supported.

Is the OMTech 40W CO2 (40W) much faster than the K40 CO2 (35W)?

Higher wattage typically means faster cutting and the ability to cut thicker material in fewer passes. The OMTech 40W CO2 (40W) cuts thicker material in single passes and engraves at higher speeds than the K40 CO2 (35W). For raster engraving the difference is smaller because surface engraving is limited by mechanical scan speed.

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Settings are community-contributed and may not reflect your exact machine configuration or material batch. Always test on scrap first. Some links are affiliate links — we may earn a small commission at no extra cost to you.

What Makers Say

★★★★★5.0· 6 reviews

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★★★★★

"Used it with a Glowforge — engraved beautifully with no changes. I will be purchasing more digital downloads from this shop."

— Anna

★★★★★

"I was struggling with lining up my NFC business cards. I was able to not only line them up much better but also do multiple cards at once — making that job so much easier."

— Camp

★★★★★

"Excellent quality and design. Cut clean and neat!"

— LYNN

★★★★★

"Great jigs. Appreciate the time saved not having to build this from scratch!"

— Bruce

★★★★★

"Excellent quality. Item as described. Expectations exceeded."

— Michael

★★★★★

"This template made my slate coasters so much easier. 4×4 coasters from Michaels drop in easily and are easy to remove. Def worth it."

— chris

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