{"id":51452,"date":"2026-06-19T17:35:43","date_gmt":"2026-06-19T15:35:43","guid":{"rendered":"https:\/\/stigal.pl\/what-should-the-power-of-the-fiber-laser-be-3-kw-6-kw-12-kw-20-kw-or-30-kw\/"},"modified":"2026-08-20T08:46:08","modified_gmt":"2026-08-20T06:46:08","slug":"what-should-the-power-of-the-fiber-laser-be-3-kw-6-kw-12-kw-20-kw-or-30-kw","status":"publish","type":"post","link":"https:\/\/stigal.pl\/en\/what-should-the-power-of-the-fiber-laser-be-3-kw-6-kw-12-kw-20-kw-or-30-kw\/","title":{"rendered":"What should the power of the fiber laser be\u20143 kW, 6 kW, 12 kW, 20 kW, or 30 kW?"},"content":{"rendered":"

What<\/strong> is the<\/strong> best fiber laser power<\/strong> for cutting metal? This is one of the most important questions when choosing a CNC cutting machine<\/a>. In practice, it\u2019s not about \u201cthe highest possible power,\u201d but about selecting a laser source that suits actual production needs\u2014the type of material, steel plate thickness, number of parts, expected edge quality, cutting cost, power supply infrastructure, and workflow organization. <\/p>\n

3 kW, 6 kW, 12 kW, 20 kW, and 30 kW lasers can be excellent solutions, but under different production conditions. The power rating is selected differently for a compact steel plate laser cutter<\/a> than for a machine designed for tubes and profiles<\/a>, and yet differently for a large-format fiber laser. Higher power usually means faster cutting speeds, shorter piercing times, and a wider range of applications. In practice, however, the goal is not to choose \u201cthe highest possible power,\u201d but to select a laser source that matches actual production needs: the type of material, steel plate thickness, number of parts, expected edge quality, cutting cost, power infrastructure, and the plant\u2019s workflow. It\u2019s a good idea to start the power selection process by asking: Which parts will be produced most frequently?<\/p>\n<\/div><\/div><\/div><\/div><\/section>

What affects the power of a laser source?<\/h2>\n

The power of a fiber laser primarily affects the amount of energy delivered to the material during the laser cutting process. When selecting laser power for steel plate cutting, it\u2019s important to remember that the higher the power, the greater the potential for faster cutting, more effective piercing, and processing a wider range of thicknesses. However, power alone does not determine quality and cost-effectiveness\u2014what matters is the entire technological system: the laser source, cutting head, optics, nozzle, gas, machine design, CNC control, CAD\/CAM software, and experience in selecting parameters. <\/p>\n

More power can improve:<\/strong><\/p>\n

    \n
  • cutting speed within specific thickness ranges,<\/li>\n
  • productivity in mass production,<\/li>\n
  • the ability to cut thicker materials and the time it takes to pierce steel plates,<\/li>\n
  • the cost-effectiveness of air cutting in selected applications,<\/li>\n
  • the plant’s flexibility in the face of fluctuating order profiles.<\/li>\n<\/ul>\n

    At the same time, it requires:<\/strong><\/p>\n

      \n
    • higher capital expenditure,<\/li>\n
    • greater energy capacity,<\/li>\n
    • more efficient cooling and exhaust,<\/li>\n
    • good production organization to maximize the machine’s potential.<\/li>\n<\/ul>\n

      If a facility primarily cuts thin sheet metal in small batches, very high power may not be fully utilized. For large batches, thicker materials, multiple punches, and multi-shift operations, higher power effectively reduces the unit cost of the part.<\/p>\n<\/div>[vc_single_image image=”51115″ img_size=”full”]<\/div><\/div><\/div><\/section>

      3 kW Laser \u2014 When Is a Lower Power Rating Sufficient?<\/h2>\n

      A 3 kW fiber laser is well-suited for applications that require a precise, compact CNC machine for cutting sheet metal of typical production thicknesses. This is by no means a \u201cweak\u201d power output\u2014in many applications, it delivers a stable, repeatable process with good edge quality, such as for assembly parts, covers, brackets, and structural components of moderate thickness. <\/p>\n

      A 3-kW laser is worth considering when:<\/strong><\/p>\n

        \n
      • The plant mainly cuts thin and medium-gauge sheet metal,<\/li>\n
      • What matters is precision, repeatability, and good edge quality,<\/li>\n
      • Production does not require high speeds for thicker materials,<\/li>\n
      • The lower investment cost is important,<\/li>\n
      • The machine is designed to operate in a confined space or with limited power supply.<\/li>\n<\/ul>\n

        In STIGAL\u2019s product lineup, the 3 kW power rating is available, among other things, in compact machines for steel plates and in lasers for tubes and profiles. It\u2019s worth noting, however, that 3 kW is chosen less frequently today\u2014many companies opt for 6 kW or more, considering not only their current needs but also future production growth. A more powerful source can serve as a safeguard against a situation where, after a few years, the machine becomes unable to handle new orders or thicker materials.<\/p>\n<\/div>