SLS uses a laser to fuse particles of plastic powder together building parts layer by layer. This powder bed technology rivals injection moulding strength and mechanical properties for short production runs of parts.
SLS technology has hardly any printing limitations giving freedom to design and print complex geometries.

SLS is a powder bed Fusion printing technology. It uses a CO2 laser to fuse tiny bits of nylon powder, tracing the geometry of digitally sliced CAD models layer by layer, after which a re-coater deposits a new layer of powder and the build platform moves down one layer in height. The process is then repeated until the parts are complete.

Why Choose SLS for your 3D Printing Project?

SLS is ideal to make functional parts that have greater toughness and higher impact strength than parts produced through other 3D Printing methods.

SLS capabilities

Requirement Specification
Maximum build Volume (Single Build) 340 x 340 x 600 mm
(Parts shall be split, Print separately and fused together to form much larger volumes)
Standard lead time 4-5 business days
Dimensional accuracy ± 0.2 mm
Layer height 100 μm
Finish As printed SLS parts are typically white or stone grey in color with a smooth surface and a powder texture and without visible layers

Materials

Nylon 12 (PA 12)
(Polyamide )

  • The industry leading material for industrial 3D printing. This robust material has superb mechanical properties and can replace injection moulded alternatives.
  • High strength and stiffness
  • Fully functional, high-quality plastic parts
  • Excellent mechanical properties, ideal substitute for common injection moulding plastics
  • High abrasion resistance, ideal for use in the development of parts with movable components
  • Excellent long-term stability

Glass-filled Nylon (PA 12 GF)
(Polyamide )

  • Glass-filled SLS nylon is reinforced with glass beads creating parts with higher stiffness and thermal stability than standard nylon.
  • High strength and stiffness
  • Temperature resistance upto 180°C
  • High Chemical Resistance
  • Excellent long-term stability

Design guidelines for SLS

The table below summarizes the recommended and technically feasible values for the most common features encountered in 3D printed parts.

Feature Recommended size
Unsupported walls 1.0 – 2.0 mm
Supported walls 0.8 – 1.0 mm
Minimum feature size 1.0 mm (living hinges are possible at 0.7 mm)
Minimum hole diameter 1.0 mm
Maximum wall thickness 20 mm

Thicker parts must be hollowed with and at least two escape holes for powder removal with a min. diameter of 8 mm

Designs