Selective Laser Sintering

Selective Laser Sintering (SLS) commonly uses materials in powdered form, primarily nylon. Before beginning an SLS print, the printing chamber is preheated to a temperature just below the melting point of the material being used. This ensures that the particles are fused together by the laser during the print process and helps to prevent distortion of the final part. During printing, the laser selectively heats the powder, causing it to fuse together to form the part. After printing is complete, the printing chamber cools down to prevent warping of the products, the part is removed from the powder bed, typically with compressed air or a brush, and excess powder is shaken or blown off. The parts are then handled in post-processing.

The SLS Printing Process: Step by Step


The first step in the SLS printing process is to prepare the 3D model to be printed. This involves slicing the digital model into thin layers using specialized software.

Powder Bed

A layer of powdered material, typically nylon, is spread evenly over the build platform.


The printing chamber is preheated to a temperature just below the melting point of the material being used. This ensures that the particles will fuse together during the printing process.

Laser Scanning

A high-powered laser scans the surface of the powder bed, selectively melting and fusing together the particles in a cross-section of the part being printed.

Layer Addition

After each layer is completed, the build platform moves down by one layer, typically 0.2mm, an additional layer of powder is spread over the previous one, and the process repeats itself until the final part is complete.


Once the printing process is complete, the part is allowed to cool down before it can be removed from the powder bed. During this stage, excess powder is shaken or blown off.


Finally, the part undergoes post-processing, which may include cleaning up any remaining powder, surface finishing, and any necessary polishing or coating.

Advantages of SLS Printing

SLS printing offers several advantages over other 3D printing technologies, including:

Greater Design Freedom

Because SLS printing uses powdered materials, it allows for greater design freedom, making it possible to create complex geometries and features that would be difficult or impossible to produce with other methods.

Cost-Effective Production

SLS printing is a cost-effective way to produce low to medium volume production parts.

Reduced Waste

Unlike other methods that require support structures, SLS printing uses the un-sintered powder as its own support. This means there is no need for support structures, resulting in less waste material.

High Quality

SLS printing produces parts with excellent surface finish, accuracy, and detail, making it ideal for functional testing and prototyping.

SLS Material available in CapableMachining

Material Color Temperature resistance Paintable Specifications
PA12 BlackAsh Black100℃NStable color
Accurae size
High reusability
PA12 WhiteBright White100℃NStable color
Accurae size
High reusability
PA12 30% GFGrayish Yellow100℃NHigh strength
Heat deformation resistance
High reusability
30% glass
PA12 40% AluMetallic Grey100℃NHigh strength
Wear resistance
Metal color
High reusability
40% aluminum powder

High-Performance SLS 3D Printing Services

CapableMachining offers cutting-edge Selective Laser Sintering (SLS) 3D printing technology to take your manufacturing capabilities to the next level. Using state-of-the-art equipment and top-quality materials, we can produce high-performance, functional parts with unmatched accuracy and detail.

Precision & Accuracy

Our SLS technology allows us to create parts with exceptional accuracy and detail, achieving tolerances of fractions of a millimeter.

Functional Prototyping

We use SLS printing for rapid prototyping of functional parts, allowing designers and engineers to test their designs before committing to expensive tooling.

Production Parts

Our SLS process can produce low to medium volume production parts that meet the strictest standards of accuracy and precision, making them ideal for use in industries such as aerospace and automotive.

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