Selective Laser Sintering (SLS) Solutions for Every Industry
SLS uses a laser to sinter powdered nylon and other materials into strong, functional parts with excellent mechanical properties and no need for support structures.
About Selective Laser Sintering (SLS)
Selective Laser Sintering (SLS) is a powder bed fusion 3D printing technology where a laser selectively sinters (fuses) layers of powdered material. The most common material is nylon (PA12), but PA11, glass-filled nylon, TPU, and other polymers are available. SLS produces parts with excellent mechanical properties — comparable to injection-molded nylon in many respects. Because the unfused powder supports the part during building, SLS requires no support structures, enabling complex geometries including interlocking assemblies, living hinges, and internal channels. SLS is the most popular technology for functional prototyping and low-volume production of plastic parts.
Tolerances
±0.005"-±0.010" (±0.13-0.25mm)
Lead Time
2-7 business days
Cost Range
$20-$200 per part; volume discounts available
Compatible Materials
Advantages
- No support structures needed
- Strong, functional parts
- Complex geometries and assemblies
- Good for functional testing
- Batch production efficient
- Consistent mechanical properties
Limitations
- Slightly porous surface texture
- Limited material selection (primarily nylon)
- Minimum wall thickness ~0.030"
- Gray or white base color
- Not suitable for clear or transparent parts
Industries Served
Aerospace
The aerospace industry manufactures aircraft, spacecraft, satellites, and related components requiring the highest standards of precision, quality, and reliability.
Automotive
The automotive industry manufactures vehicles and components, demanding high-volume production, consistent quality, and competitive pricing across a complex global supply chain.
Medical Devices
The medical device industry manufactures instruments, implants, diagnostics, and equipment that must meet stringent regulatory requirements for safety and biocompatibility.
Defense & Military
The defense industry manufactures weapons systems, vehicles, equipment, and components for military applications, requiring the highest security, reliability, and quality standards.
Consumer Products
Consumer products manufacturing produces household goods, appliances, sporting equipment, and personal items through high-volume processes prioritizing aesthetics and cost efficiency.
Selective Laser Sintering (SLS) FAQ
How strong are SLS nylon parts?
SLS PA12 nylon parts have tensile strength of 6,500-7,200 PSI, elongation at break of 15-25%, and good impact resistance. These properties are comparable to injection-molded nylon, making SLS suitable for functional prototypes and end-use parts.
What is the surface finish of SLS parts?
SLS parts have a slightly grainy, matte surface texture with roughness of ~250-400 Ra microinches. Parts can be tumble-polished, vapor-smoothed, dyed, or painted for improved aesthetics. Vapor smoothing produces a near-glossy surface.
Can SLS parts be used outdoors?
SLS nylon parts have good UV resistance but will yellow and become brittle with prolonged sun exposure. For outdoor use, UV-stabilized materials, protective coatings, or dye (black absorbs UV) are recommended.
What is the minimum feature size for SLS?
Minimum wall thickness is approximately 0.030" (0.7mm). Minimum feature size is about 0.020" (0.5mm). Holes under 0.040" diameter may close during sintering. These limits depend on the specific machine and material parameters.
How many SLS parts can be produced at once?
SLS builds parts in a powder bed, and multiple parts can be nested in three dimensions. A single build can produce dozens to hundreds of parts depending on size. This batch capability makes SLS cost-effective for low-to-medium volumes.
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