30w vs 40w Laser Engraver: Which One Should You Buy?

Side by side

Specifications are manufacturer rated, as published on each listing and collected 22 October 2026.

30w vs 40w laser engraver: what 30W buys

Both listings are 30W machines, so the 40W side of this comparison has no product in the data set. What the two show is what 30W means in practice: the GWEIKE is a 30W 1064nm fiber laser built for deep engraving on metal, while the Longer is a 30W diode built for cutting wood and acrylic. Between these two listings, the laser type decides the job more than the wattage number does.

Fiber vs diode

The GWEIKE 1064nm fiber laser engraves deep into metal and marks 90+ colors on stainless steel and titanium, with 8K resolution at 0.001 mm. The Longer diode cuts 25 mm basswood and 50 mm acrylic and engraves colorful patterns on mirrored stainless steel. In these two listings, the fiber handles deep metal engraving and the diode handles wood and acrylic cutting. See our diode vs CO2 guide for how laser types differ.

Speed and work area

The GWEIKE lists 15000 mm/s on a 150 x 150 mm bed; the Longer lists 600 mm/s on a 450 x 440 mm bed. The fiber is far faster per the listings, but its bed is a fraction of the diode’s. Pick the bed that fits your parts.

Safety

The GWEIKE states Class 4 safety level, FDA accession number 2211667-002, an emergency stop button, protective glasses and a protective cover. The Longer states 8 safety features including flame detection and emergency stop. Class 4 is the highest laser hazard class; the GWEIKE pairs that listing with protective glasses, an e-stop and a cover. On either machine, use the listed eye protection, ventilate the work area, and stay with the machine while it runs. See our best fiber laser engraver picks for more Class 4 machines.

Software and connectivity

Both work with LightBurn. The GWEIKE adds WiFi and USB with dual red light positioning and an electric lift column. The Longer pairs its air assist pump to LightBurn control.

Choose the GWEIKE G2 Pro 30W if

• You engrave metal, jewelry or tags and want deep engraving with color marking.
• You want 15000 mm/s speed and 8K detail on small parts.
• Stated Class 4 compliance with an FDA accession number matters to you.

Choose the Longer B1 30W if

• You cut wood and acrylic and want a 450 x 440 mm bed.
• You want air assist and LightBurn control out of the box.
• You want the lighter 21.6 lb machine.

For more enclosed options, see best enclosed laser engraver.

Project Match

• Metal tags and jewelry: the GWEIKE fiber, with 90+ color marking on stainless steel.
• Wood signs and acrylic cut parts: the Longer diode, with a 450 x 440 mm bed.
• Small detailed engraving: the GWEIKE, with 8K resolution at 0.001 mm.
• Large-format cutting: the Longer, with air assist for cleaner edges.

FAQ: lasers and CNC

Is 30W enough for cutting wood?

The Longer listing says it cuts 25 mm basswood and 50 mm acrylic. The GWEIKE fiber is built for engraving metal, not for cutting wood.

What is the difference between fiber and diode lasers?

The GWEIKE 1064nm fiber laser engraves deep into metal; the Longer diode cuts wood and acrylic. Pick by the material you work most.

Do these need ventilation?

Yes. Both make smoke and fumes; vent outdoors or use a fume extractor. Never laser PVC or vinyl.

Which one is safer?

The GWEIKE states Class 4 with an FDA accession number; the Longer states 8 safety features. Class 4 is the highest hazard class, so follow all stated precautions on either machine.

Related: how to choose a laser engraver, best laser engraver for metal and diode vs CO2 laser.