Fast, High-Precision SLS 3D Printing Services

ZReal-Time Production Updates
ZParts as Fast as Few Days
ZRapid Turnaround for Complex Parts

What is SLS 3D Printing?

Selective Laser Sintering (SLS) is an advanced 3D printing technology that creates highly accurate and durable parts for end-use applications, low-volume production, and rapid prototyping. As one of the most cost-effective industrial 3D printing methods, the SLS process can produce parts in bulk and often requires fewer support structures, minimizing material waste and production time.

The SLS process utilizes a high-power CO2 laser to fuse fine plastic powder particles into precise three-dimensional shapes. It scans cross-sections from 3D digital models, like CAD files, onto a powder bed, selectively fusing the material layer by layer. This continues until the part is fully formed, resulting in complex geometries with excellent mechanical properties.

The capability of SLS to produce functional prototypes and end-use parts with minimal post-processing makes it essential for industries such as aerospace, automotive, consumer products, and medical devices.

SLS 3D Printing Materials Selection

Nylon 12

Nylon 11

Nylon 12, Glass-Filled (GF)

Nylon 12, Carbon-Filled (CF)

Nylon 12, Aluminum-Filled (AF)

Nylon 12, Mineral-Filled (HST)

Nylon 12, Flame Retardant (FR)

Metal Powders

TPU

Nylon 12

Offers excellent mechanical properties, including high elongation at break and impact resistance. Commonly used in automotive, aerospace, and consumer product applications for functional parts.

Nylon 11

Known for its superior chemical resistance, low moisture absorption, and lightweight characteristics. Often selected for chemical industry equipment and hydraulic components.

Nylon 12, Glass-Filled (GF)

Features increased stiffness and strength due to glass fiber reinforcement. Employed in mechanical parts and structures requiring enhanced dimensional stability.

Nylon 12, Carbon-Filled (CF)

Enhanced with carbon fiber for improved electrical conductivity and thermal management. Utilized in electrical and electronic component housings.

Nylon 12, Aluminum-Filled (AF)

Provides good thermal conductivity and a metallic appearance. Suitable for heat dissipation components and decorative parts with a metallic look.

Nylon 12, Mineral-Filled (HST)

Improved rigidity and heat resistance make it ideal for high-temperature applications, such as automotive engine parts.

Nylon 12, Flame Retardant (FR)

Exhibits self-extinguishing properties, making it essential for electronic devices and components required to meet stringent safety standards.

Metal Powders

Used in SLS for creating complex, high-strength metal parts with fine detail. Crucial for functional prototypes and end-use parts in industries like aerospace and medical.

TPU

Known for its exceptional elasticity and durability. Widely used in flexible components, such as seals, gaskets, and wearable technology.

We can source any other material on request, but quotes take up to 48 hours.

Surface Finish Options for Selective Laser Sintering

Description

Advantages

Suitable Applications

Raw Surface

No post-processing, retains the original SLS texture.

Lowest cost, preserves original details.

Functional prototypes, parts not requiring aesthetic appeal.

Sandblasting

Uses high-pressure sand to smooth the surface.

Improves surface roughness, evens out appearance.

Parts requiring semi-smooth surfaces.

Polishing

Mechanical or chemical methods to smooth the surface.

Achieves a smooth surface, enhances aesthetics.

High-visual requirement parts, such as display models.

Dyeing

Immerses parts in dye to change color.

Alters color, increases aesthetic appeal.

Parts requiring specific colors.

Painting

Applies paint or other coatings to the surface.

Changes color and texture, improves durability.

End-use parts needing special appearance or protection.

Impregnation

Dips parts in resin and cures them.

Increases strength, improves waterproofing.

Parts needing enhanced mechanical properties.

*Note: This table outlines general 3D printing surface finish options. Actual preparation methods vary and may necessitate specific technical expertise and equipment. For personalized advice on the optimal surface finish for your project, please get in touch.

SLS 3D Printing General Tolerances

Description

Value

Description

General Tolerances

±0.3% (with a lower limit of ±0.3 mm)

The general accuracy for most parts, accounting for overall dimensions.

Build Volume

Up to 400 x 400 x 400 mm

The maximum size of the build chamber for creating large parts.

Recommended Max Size

380 x 380 x 380 mm

The recommended maximum size for optimal accuracy and quality.

Layer Thickness

0.08 – 0.15 mm

The thickness of each layer, affecting surface finish and detail resolution.

Minimum Feature Size

0.8 mm

The smallest feature size that can be reliably printed.

Hole Diameter Tolerance

±0.1 mm for holes < 5 mm,
±0.2 mm for holes > 5 mm

Specific tolerance for hole diameters,
varying with size.

Surface Roughness

2-3%

Compensation for material shrinkage during cooling, integrated into the design.

*Note: The table serves as a guide. Outcomes vary by material, complexity, equipment, workload, and project specifics.

Advantages of SLS 3D Printing at XMAKE

No Support Structures Needed

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SLS does not require support structures, allowing for the creation of complex geometries and overhanging features without additional material or post-processing to remove supports.

Fast Printing Speed

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SLS offers fast printing speeds, which is essential for rapid prototyping. The ability to print multiple parts in a single batch further accelerates the production process.

Reduced Material Waste

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The unsintered powder in SLS can be reused, significantly reducing material waste and making the process more sustainable and cost-effective.

Dyeing and Coloring Options

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SLS parts have porous surfaces that can be easily dyed or colored during post-processing, allowing for enhanced aesthetic finishes and customization.

Excellent Mechanical Properties

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Parts produced using SLS exhibit superior mechanical properties, including strength, stiffness, and durability. The process results in isotropic properties, meaning the parts have uniform strength in all directions.

Freedom of Form

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SLS enables the production of parts with intricate and complex geometries, providing designers with significant freedom to innovate and create detailed designs.

How does SLS 3D Printing Work？

The SLS machine starts by sintering each layer of the part’s geometry into a heated bed of nylon-based powder. After each layer is fused, a roller spreads the next layer of powder across the bed. This process repeats layer by layer until the build is complete.

Once the build is finished, the powder bed containing the parts is moved to a breakout station, where it is raised, and the parts are broken out of the bed. The parts are initially brushed off to remove the majority of loose powder. They are then bead blasted to remove any remaining powder before they are sent to the finishing department.

Why Choose XMAKE’s Custom SLS 3D Printing Services

Complex Geometries with High Precision

XMAKE’s SLS technology enables the creation of intricate geometries with outstanding precision, ideal for complex designs, prototypes, and production parts.

Scalable Production Capabilities

XMAKE accommodates both single prototypes and large-scale production, ensuring consistent quality and seamless transition from prototype to full-scale manufacturing.

Comprehensive Customer Support

XMAKE offers exceptional customer service from design to delivery, with expert support at every step to ensure a smooth, successful process.

SLS 3D Printing FAQs

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1. How does SLS compare to other 3D printing technologies?

Compared to other 3D printing technologies like FDM (Fused Deposition Modeling) and SLA (Stereolithography), SLS offers better mechanical properties and more material choices, but it can be more expensive and requires more post-processing.

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2. What is the cost of SLS 3D printing?

The cost of SLS 3D printing varies depending on factors such as the material used, the size and complexity of the part, and the quantity being produced. It generally ranges from a few hundred to several thousand dollars per part.

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3. What are the applications of SLS 3D printing?

SLS 3D printing is used in various industries such as aerospace, automotive, healthcare, consumer goods, and manufacturing for prototyping, tooling, and end-use parts.

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4. What Post-Processing Is Required for SLS Printed Parts?

Post-processing for SLS parts may include removing support structures, cleaning with compressed air, and surface treatments like sandblasting or painting for improved aesthetics and durability.

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5. What are the common challenges in SLS 3D printing?

Common challenges in SLS 3D printing include managing the powder, ensuring consistent part quality, handling the high cost of materials and equipment, and addressing issues related to part warping and shrinkage.

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6. How long does it take to produce parts with SLS?

SLS can produce parts relatively quickly, with turnaround times ranging from a few days to a couple of weeks, depending on the complexity and volume of the order.