It is the hazard classification of the laser product as its maker declares it under the laser safety standard: an enclosed machine with interlocks can be classed differently from the open laser module inside it. The class describes accessible radiation, not cutting ability.
Laser engravers carry a class on their label, and it is easy to read it as a power rating when it is a safety classification.
What the class describes
The class groups laser products by the accessible radiation they can expose a person to in normal use, under the laser product safety standard. The maker declares the class and prints it on the product label.
Why the product matters more than the module
An open-frame machine exposes the beam area, so the product is classed by its module. An enclosed machine with interlocks that stop the laser when a lid opens, and a window that filters the laser’s wavelength, can be classed as a whole product with a lower class. Makers state which design gives which class.
What the class does not say
It does not describe cutting power, which follows optical output, focus and air assist. It does not describe fumes, which need extraction whatever the class. It does not replace the maker’s instructions on eye protection, especially with doors open or during alignment.
How this site reports it
Pages report the laser class the maker publishes and the design features it cites — enclosure, interlocks, filtered window. No machine is described as safe because of its class.
If this page and the manufacturer’s manual disagree, follow the manual. Every laser power, speed, build volume, resolution, temperature and safety rating on this page is taken from the maker’s own documentation, with its unit as published and its source named — none of it is measured here. A figure is written the way the maker states it and is not converted into another convention, because the converted value would be a different number. And the point repeated rather than assumed: a laser module’s electrical power and its optical power are two different figures. The first is what the module draws; the second is what leaves the lens and reaches the material, and it is smaller. This page says which figure the maker publishes and never presents one as the other.
Questions makers ask before buying
Why can an enclosed laser have a lower class than its module?
Because the classification applies to the radiation a user can reach. An enclosure with interlocks and a filtered window contains the beam, and the maker classifies the whole product.
Does a lower class mean eye protection is not needed?
The maker’s instructions state when protection is required, including when doors are open or during maintenance. The class alone does not replace those instructions.
Last reviewed 15 September 2026