Best lasers for serial-number marking

Machines in this decision

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Evidence desk

Side-by-side documented facts

Facts below were checked against official sources on 3 Sep 2026. Prices, bundles and regional terms can change.

Define the mark before the machine

State whether the job needs surface contrast, annealing, coating removal, material removal, human-readable text, a barcode or a data-matrix code. Then define the exact substrate, finish, smallest feature, field size and durability requirement.

A vendor sample may establish feasibility, but production qualification should use your parts, data, fixtures and inspection threshold.

Conventional fiber versus MOPA

Conventional fiber can be sufficient for many repeat metal marks. MOPA adds adjustable pulse behavior that can expand process control on selected alloys and finishes, but that flexibility only earns its premium when a validated requirement uses it.

Do not equate a color demonstration with durable traceability, or a maximum depth claim with your finished part.

System and workflow requirements

Check lens/field size, Z clearance, autofocus method, fixture datum, rotary need, enclosure or controlled-area design, extraction and file/data software. Smaller fields can support finer focus but may not fit the part or fixture.

For serialized data, also control duplicate prevention, readable character rules, code verification and record retention outside the laser itself.

Who should choose neither

Do not proceed when the substrate or coating is unknown, the required durability test is undefined, the field cannot contain the part and fixture, or an open system cannot be controlled.

For regulated medical, aerospace, automotive or safety-critical identification, obtain the applicable customer, quality and regulatory requirements; this guide does not certify a process.