The Process of Laser Marking CNC Machined Parts

  • Date:
  • Views:7
  • Source:Axom



In the competitive world of precision manufacturing, a part is not complete with just impeccable dimensions and surface finishes. Permanent part identification is crucial for traceability, branding, and functionality. This is where laser marking seamlessly integrates with CNC machining, offering a versatile, durable, and highprecision solution. For businesses seeking a reliable partner for endtoend part production, understanding this process is key to ensuring superior quality from the initial cut to the final mark.


cnc machining center
Laser marking is a noncontact, noninvasive process that uses a focused beam of light to alter the surface of a material. It does not involve tool pressure or inks, making it ideal for delicate, highvalue, or miniature CNC machined components. The process begins once the part has been machined to its final specifications. The component is placed in the laser marking system, often on a rotary axis for complex geometries. A digital file, created from a vector graphic or bitmap, guides the laser beam across the part's surface.

The interaction between the laser and the material creates the permanent mark through several methods, chosen based on the material and the desired result:

Annealing: Primarily for metals like steel and titanium, the laser heats the surface without ablating it, creating a dark oxide layer that results in a highcontrast, corrosionresistant mark.
Engraving: The laser removes a small amount of material to create a recessed mark. This is highly durable and excellent for parts subject to wear.
Foaming: Used for certain plastics, the laser melts the material, causing gas bubbles to form that create a lightcolored mark.

cnc machining online
Carbon Migration: For some steels, the laser breaks down carbon bonds, bringing carbon to the surface to form a dark, permanent mark.

The advantages of integrating laser marking into a CNC machining workflow are substantial. It allows for the marking of serial numbers, QR codes, barcodes, and logos with extreme precision on even the most complex part geometries. The marks are resistant to heat, abrasion, and chemicals, ensuring legibility throughout the part's lifecycle. This is indispensable for industries like aerospace, medical, and automotive, where part traceability is mandated.



As a onestopshop for CNC machined parts, we leverage laser marking to add significant value for our clients. By consolidating machining and marking under one roof, we guarantee consistency, reduce lead times, and eliminate the logistical challenges of outsourcing. Whether you require black annealed marks on stainless steel surgical instruments or deep engraving on anodized aluminum automotive components, our integrated process ensures your parts are delivered fully finished, traceable, and professionally branded. Partner with us to experience a streamlined supply chain where precision machining meets permanent, highquality part identification.