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3D printing - SLS

Selective Laser Sintering service

China Selective Laser Sintering service

SLS 3D Printing Service

Selective laser sintering (SLS) is a powerful 3D printing technology that produces highly accurate and durable parts that are capable of being used directly in end-use, low-volume production, or for rapid prototyping. SLS is one of the most inexpensive options for industrial 3D printing services because it can build parts in bulk without support structure requirements. Stereolithography service

3D Printing Service

An additive manufacturing layer technology, selective laser sintering involves the use of a high-power laser (for example, a carbon dioxide laser) to fuse small particles of plastic powders into a mass that has a desired three-dimensional shape. The laser selectively fuses powdered material by scanning cross-sections generated from a 3-D digital description of the part (for example from a CAD file or scan data) on the surface of a powder bed. After each cross-section is scanned, the powder bed is lowered by one layer thickness, a new layer of material is applied on top, and the selective laser sintering process is repeated until the part is completed.

SLS Materials

Selective Laser Sintering 3D Printing Materials

Material Name Other Common Names Shore Hardness Elongation at Break (%) Impact Strength, Notched (kJ/m²)
Nylon 12 Durable plastic, PA12, PA 2200 75D 18% 4.8 kJ/m²
Nylon 12, Glass-filled (GF) Stiff plastic, PA12 GF, PA 3200 GF 80D 9% 4.2 kJ/m²
Nylon 11 EX Ductile plastic, PA11, Rilsan® Invent Natural 77D 45% No break
Nylon 12, Carbon-Filled (CF) High-performance plastic, carbon-filled PA12, PA 602-CF, carbonmide N/A 4% 5.3 kJ/m²
Nylon 12, Aluminum-Filled (AF) Metallic gray plastic, aluminum-filled PA12, alumide 76D 3% 4.6 kJ/m²
Nylon 12, Mineral-Filled (HST) Heat-resistant plastic, mineral fiber-reinforced PA12, PA 620-MF 75D 3-5% N/A

SLS Finishes at Tiandiao

Standard SLS parts are de-powdered with a sandblasting process and manual powder removal. Internal holes may be drilled to size if accessible. The finish is white matte (fine sugar-cube).

Color Dyed Color options of dye black, blue, green, red, or yellow. Batch to batch consistency may vary slightly with black being the most consistent. Dye penetrates ~0.010" deep.

Vapor Smoothing An automated post-processing technology (AMT PostPro3D) that achieves a high-quality surface finish. Vapor smoothing brings most surfaces from a matte to a semi-gloss. Vapor smoothing also seals the surface, enhances mechanical properties, and provides a consistent cosmetic finish for production. Vapor smoothed parts can be dyed.

Media Tumbled Standard finish with the addition of abrasive media tumbling. These parts will have reduced grow lines and sharp edges may be softened by the tumbling process. The parts are left with an eggshell finish.

Nickel Plating Standard finish with a secondary copper + nickel plating processes adding 0.004"-0.006" nickel coating. Nickel plating adds durability, stiffness, and wear resistance but is not considered cosmetic. Finish is rough nickel.

Additional Finishes Tiandiao provides additional SLS finishing and customization options upon request.

Vapor Smoothing SLS 3D Printed Parts

Vapor Smoothing SLS 3D Printed Parts

Tiandiao can vapor smooth 3D printed parts to achieve an exceptional surface finish. Vapor smoothing, performed through AMT PostPro3D's technology, is a batch-based automated smoothing process that achieves a high-quality surface. Combined with the low costs SLS, this surface finish can make parts competitive with injection molding from both form and function. Vapor smoothing creates a uniform, sealed surface with a semi-gloss appearance. SLS parts can be color-dyed. The enhanced surface also increases the overall performance of 3D printed parts including ultimate tensile strength, yield at flex, and percent elongation to break. Vapor smoothing can be applied to HP Multi Jet Fusion, selective laser sintering, and fused deposition modeling parts for both rigid plastics and elastomers.


  • Concept Models

    Concept Models

    The speed and versatility of SLS lets product developers create physical snapshots of their designs through the iterative process.

  • Rapid Prototyping

    Rapid Prototyping

    SLS can be used to create fully-functional prototypes, complete with moving parts, as well as all-in-one assemblies.

  • Direct Digital Manufacturing

    Direct Digital Manufacturing

    The high accuracy and consistency of SLS makes it an ideal way to build large quantities of discrete or customized parts.

Advantages of SLS

Durability Nylon is a durable material with great impact strength, medium flexibility, and high resistance to environmental factors.

Rapid Turnaround Parts can typically be shipped in 3-4 days, allowing for faster design iterations and speed to market.

Parts Production SLS is capable of producing end-use parts on-demand, increasing throughput.

Complex Geometry Geometries can be built more easily due to the 3D printing process, adding complexity without additional cost.

Scalability SLS can make a single part or component as easily as dozens of production pieces.

Precision We use the latest generation of SLS technologies to meet tolerances of +/- 0.005” or +/- 0.002” per inch, whichever is greater. Please see our Manufacturing Standards for more details.

SLS General Tolerances

Description Tolerance Notes
General Tolerances +/- 0.005” for the first inch is typical, plus +/- 0.002” for every inch thereafter.
Build Area Build area up to 13" x 13" x 20". Glass filled can extend up to 26" x 15" x 23".
Minimum Feature Size 0.030" or greater.
Standard Layer Thickness 0.0045

Overview: What is SLS?

What is SLS

The Basics Of Selective Laser Sintering Selective laser sintering (SLS) is a powder bed 3D printing technology that produces highly accurate and durable parts capable of being used directly in end-use, low-volume production. SLS is a newer 3D printing process that is often thought of as a cousin to the popular metal 3D printing technology direct metal laser sintering (DMLS). Both processes work by utilizing a laser to precisely fuse a bed of powder to construct a part from a 3D CAD file. SLS specializes in nylon or polyamide powder particles to create parts, while DMLS uses metal particles, and is extremely common for prototyping and low volume production.

The Benefits Of Working With Tiandiao For Selective Laser Sintering Tiandiao can always help you find the ideal supplier for your specific SLS needs. Our factory has a wide range of dedicated quick turn SLS partners with a variety of high-quality finishing and material capabilities and many types of sintering systems. Finishing options available include color dyeing, sanding, painting, and plating to meet your needs. From low-volume prototyping to high-volume production.

The Basics Of Selective Laser Sintering

The Basics Of Selective Laser Sintering Selective laser sintering can be used to make parts using a variety of materials, including plastic, metal, ceramic, or glass powder, making it a popular machining process. Since SLS doesn’t require a support structure like most other 3D printing tech, parts can be made in greater quantities, but with less labor and material expense. Additionally, because the support structure doesn’t need to be removed, there is less risk of damage to the complex internal geometries 3D manufacturing is capable of producing.

SLS can be useful for both rapid prototyping or low-volume production of functional end-use parts. Nylon, especially, is a durable material with great impact strength, medium flexibility, and high resistance to environmental factors.This combination of complexity, design flexibility, material diversity, rapid turnaround, and overall durability makes SLS an increasingly popular choice in many industries.

Why Choose Tiandiao for SLS?

Contact us for more detailed info

Zhigu 36-2, Zhongnan high-tech Canal, Deqing County, Zhejiang, Zhejiang Province

Ways to contact us + 86 137 1400 0960