Pick a wood laser by the thickest board you must cut, the usable bed area, and whether it needs a separate chiller.
Wattage is the number buyers check first and the one that misleads most. A diode module sold as 70 W-class is not the same animal as a 55 W CO₂ tube. Guidance on how to choose a laser cutter for wood usually stops at power ratings; three specs settle it — laser type and wattage, usable bed area, and cooling.
Picking A Laser Cutter For Wood: What Wattage Actually Tells You
Match power to the thickest wood you must cut in a single pass, not to the fastest engraving demo. Diode machines in the 6–10 W range are tools for engraving and light cutting; 40–80 W CO₂ systems handle thick stock and repeat production.
Published wattage does not guarantee a depth. Cut results shift with species, moisture, resin, plywood adhesive, focus, air assist, speed, pass count, and lens condition. Voids, glue lines, and a warped core burn instead of cutting no matter what the tube is rated.
Architecture claims are separate from optical output: a 70 W-class diode array of twelve 6 W chips does not equal a 70 W CO₂ tube, because stacking emitters does not deliver the same beam. Rated top speeds come from light engraving; deep cuts run at a fraction of them.
CO₂ builders publish their own ladders. Thunder Laser lists 30, 60, and 80 W configurations with work areas from 508 × 305 mm up to 915 × 610 mm, and Thunder Laser’s CO₂ configuration list shows how fast bed size and price climb together.
| Model | Laser And Power | Work Area And Listed Price |
|---|---|---|
| Ortur Laser Master 3 | Diode, 10 W or 20 W, open frame | 400 × 400 mm, from $299.99 |
| Glowforge Aura | Diode, 6 W, Class 1 enclosure | 12 × 12 in, $999 |
| xTool S1 | Diode, 20 W or 40 W, enclosed | 498 × 319 mm, from $1,448 |
| Sculpfun S70 Max | Diode, 70 W-class (12 × 6 W chips) | 830 × 800 mm, $1,599 |
| OMTech AF2028-60 | CO₂, 60 W, separate water pump | 20 × 28 in, $2,599.99 |
| xTool P2S | CO₂, 55 W | 600 × 305 mm, from $2,999 |
| xTool X1 | CO₂, 55 W | 615 × 320 mm, from $3,399 |
| xTool P3 | CO₂, 80 W | 915 × 458 mm, from $6,599 |
Volume matters too: a shop cutting twenty parts a day needs duty-cycle headroom a hobby machine cannot hold. Our tested roundup of wood laser cutters puts these classes side by side with what each genuinely handles.
How Much Bed Size Do You Actually Need?
Size the bed to your largest finished part plus clearance, never to the frame number in the product photo. Advertised dimensions often include the housing.
- Measure the biggest finished component, including margins and clamping clearance.
- Add room for ventilation gaps, jigs, registration marks, and material movement.
- For signs, panels, or batch runs, start at the 400 × 400 mm class or a larger CO₂ bed.
- Compare usable cutting area against the advertised frame before you pay.
A galvo field suits tags and jewelry but forces repositioning on sheet stock; batch work needs a paper nest first, since three small signs across usually demand more width than one long panel.
Cooling And Ventilation Add Cost Most Buyers Miss
CO₂ tubes require liquid cooling, and whether the package includes a pump, radiator, or dedicated chiller changes install cost and daily routine. Diode machines usually rely on heat sinks and fans, but duty-cycle limits live in the manual.
The OMTech AF2028-60 runs a separate water pump and weighs 249 lb, turning cooling and placement into installation decisions. Thunder Laser recommends pricing the complete setup — cooling, extraction, software, rotary accessories, delivery, and training — before committing.
Enclosure style matters as much as the beam: the xTool S1 and Glowforge Aura are Class 1 enclosed units, while open-frame diode machines expect a ventilated workspace and safety glasses. Wood smoke carries hazardous particulates and gases, so active extraction belongs in the budget. Never cut treated, painted, laminated, or unidentified material; PVC and chlorine-containing plastics release corrosive, toxic gas.
Order the three specs before checkout: thickest board first, then largest part plus clearance, then cooling that fits the room.
Common Questions
Can A Diode Laser Cut 3/4-Inch Plywood?
Sometimes, but rarely in one clean pass. A 20 W diode can work through 3/4-inch plywood in several passes with steady air assist, while 6–10 W units usually stall. Glue quality matters as much as wattage, since cheap plywood with voids and thick adhesive burns instead of cutting. A 40 W or higher CO₂ machine handles the same board far more consistently.
Does A CO₂ Laser Need A Chiller Or Just A Water Pump?
It depends on tube power and run length. Smaller tubes doing light, intermittent work often manage with a pump and reservoir, which is how many entry machines ship. Higher power and long production runs build more heat and generally call for a dedicated chiller. Confirm what is in the box before ordering, because pumps are frequently sold separately.
How Do I Vent A Laser Cutter In A Garage?
Run an exhaust fan and ducting outdoors, sized to the enclosure, and keep the run short with few bends. Add filtration if venting outside is not possible or neighbors sit close. Crack a window for makeup air, and never cut PVC, painted stock, or unidentified material. Check local rules before cutting a hole through a wall.
Sources
- Thunder Laser. “Laser Engravers” Lists CO₂ configurations at 30, 60, and 80 W with work areas, and advises comparing the complete setup.
- xTool. “xTool Laser Comparison” Source for the model work areas, power ratings, and November 2026 US prices in the table.