SLM Solutions SLM 125

The SLM Solutions SLM 125 is the entry-level system in the SLM product line, offering a compact 125 x 125 x 125 mm build envelope with a single 400 W fiber laser. Designed for research institutions, university labs, aerospace component developers, and dental manufacturers who need industrial LPBF capability without the capital outlay of a larger production machine, the SLM 125 delivers the same Selective Laser Melting process quality as SLM's larger platforms at a significantly lower cost and space footprint.

The SLM 125 uses SLM Solutions' proven bi-directional gas flow system, which sweeps inert gas across the powder bed in alternating directions between layers to achieve consistent weld tracks and minimize spatter redeposition. The single 400 W fiber laser produces a focus diameter of approximately 70–100 µm, supporting layer thicknesses from 20 to 75 µm across all qualified materials. The build chamber achieves oxygen content below 0.1%, enabling safe processing of reactive metals including titanium and aluminum alloys.

A defining characteristic of the SLM 125 for research users is its open parameter architecture. Unlike some LPBF platforms that restrict non-OEM powders or require factory parameter sets, the SLM 125 allows full user-accessible parameter definition. This is critical for universities and materials science groups developing new alloys or parameter optimization studies. SLM Solutions supports over 30 materials on the platform, and the machine has been used extensively in aerospace alloy development research.

For production buyers, the SLM 125 makes sense as a qualification workhorse — running process development, parameter qualification, and small-batch production of parts too small to justify tying up a larger platform. The 125 x 125 mm build plate is well-matched to aerospace coupons, medical implant prototypes, and small fluid manifolds. Pricing in the $350,000–$500,000 range positions the SLM 125 as the most accessible SLM Solutions system, and it competes directly with the EOS FORMIGA M 100 and 3D Systems DMP Flex 100 in the compact research/dental segment.