Adding threads to SLS 3D printed parts is key when moving from prototypes to production. Explore tapping, inserts, and printed... Continue reading
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3D printing with Selective Laser Sintering (SLS)
What is Selective Laser Sintering (SLS) prototyping?
Selective Laser Sintering (SLS) is an additive manufacturing technology for 3D printing parts with complex geometries. It is suitable for both visual models and functional prototypes.
Choose your preferrred production speed—overnight, 3, 7, or 12 days—depending on your technical requirements and project timeline. Whichever option you select, you can count on consistently high quality.
We also offer a choice of finishing options.
What is the SLS build process?
SLS parts are built, layer by layer from the bottom up, with a computer-controlled laser beam fusing fine white plastic powder. Each new layer is fused to the layer beneath. Where necessary, support structures are also printed to prevent overhanging or other features from distorting during the build process. After the part is built, the support structures are removed, the part is cleaned, and any additional finishing processes applied.
When is SLS used for prototyping?
SLS is accurate and is used to 3D print parts for concept models, visual models for presentations, and functional prototypes for testing or usability trials. SLS parts benefit from high strength and stiffness, so they are often used for simulating components that will ultimately be injection moulded.
In some cases, SLS is economical for producing end-use parts, depending on the finish applied, operating environment and anticipated usage.
SLS prototyping capabilities
We use P1 SLS machines manufactured by EOS GmbH because these are among the most technically advanced and versatile plastic 3D printers in the world. They produce high-quality, high-accuracy parts from Matrix PA12 CR material (a sustainable material) in layers of 0.1mm. Build speed is relatively fast, even with highly complex geometries. The build volume on our machines is up to 194 x 242 x 320 mm (Z axis).
For more information about the SLS machine and material, download our material datasheet and process guide.
Characteristics of SLS 3D printed parts
SLS parts have high strength, stiffness and long-term dimensional stability thanks to the properties of the Matrix PA12 CR material and the good powder fusion. Consequently, detailed parts can be used in visual models, functional prototypes or finished products. Abrasion resistance is good, so SLS 3D printed mechanisms can have parts moving relative to each other.
SLS parts printed from Matrix PA12 CR have good chemical resistance and are biocompatible according to EN ISO 10993-1 and USP/level VI/121 °C for use in medical applications. The material is also approved for food contact in compliance with the EU plastics directive 2002/72/EC.
Matrix PA12 CR combines a heaviliy reduced CO2e footprint with the technical properties of PA 2200.
Finishing options for SLS 3D printed parts
After cleaning and visual inspection, SLS printed parts can be lacquered to seal the surfaces, coloured, a blackout/RFI/EMC coating can be applied to internal surfaces, and secondary assembly operations can be carried out such as fitting threaded inserts.
See our Finishing options page for further details.
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Upload your CAD file today and receive instant pricing on your next project. Fast, simple, and supported by a UK-based team with decades of experience.
For all other quote requests, please use the form below.
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Please Note: requests for our 3-Day production speed must meet our 3-Day criteria. All final data for our 3-Day production speed is required by 4.30pm.
To request a quote for any of our other technologies/services, such as Vacuum Casting, Model Making and Laser Cutting, please complete this contact form.
SLS 3D Printing FAQ
What is SLS 3D Printing?
SLS (Selective Laser Sintering) is a powder-based 3D printing process that uses a laser to fuse layers of nylon material together to create functional prototypes and production parts. It is well-suited to complex geometries, lightweight structures and parts that need strength and durability.
What can SLS 3D printing be used for?
SLS is widely used for functional prototypes, jigs and fixtures, and end-use parts. Its ability to produce complex shapes without the need for support structures makes it ideal for lightweight components, housings, enclosures and assemblies. Because SLS parts are strong and durable, the process is also well-suited to low volume production runs.
Can SLS parts be used for end-use applications?
Absolutely. SLS parts possess mechanical properties suitable for end-use applications, including high strength, durability, and thermal resistance. They are often used in functional components, housings, and assemblies that require long-term performance.
How does SLS compare to SLA or DLP 3D printing?
What industries benefit from SLS 3D Printing?
SLS is widely used across various industries, including:
- Automotive: For prototyping and producing durable components.
- Medical: Creating custom prosthetics and anatomical models.
- Consumer Goods: Manufacturing complex and customized products.
- Aerospace: Producing lightweight and strong parts for aircraft and spacecraft.
What material do you offer for SLS 3D Printing?
SLS commonly utilises thermoplastic polymers like Nylon 12 (PA12), known for its strength, durability, and thermal resistance.
We offer Matrix PA12 CR – a carbon reduced nylon. To learn more about Matrix PA12 CR, visit our Materials Datasheets page.
What design guidelines should I follow for SLS 3D Printing?
SLS is very versatile, but we recommend a minimum wall thickness of 0.7 mm for rigid parts and 1 mm for larger components. Features such as snap-fits, clips and living hinges are possible, but it’s always best to check your design with our team if you’re unsure. We can advise on adjustments to optimise strength, detail and finish.
What are the lead times for SLS 3D Printing?
We offer a range of production speeds to suit your project needs. SLS 3D printed parts can be delivered via our Overnight service, or you can choose from 3, 7, or 12 working day turnaround options depending on your timescales and budget.
Can I get an instant quote for SLS 3D Printing?
Yes. Our online Matrix system allows you to upload your files, get an instant quote and place your order directly for SLS 3D printed parts (as well as for SLA and DLP parts). You can also select your required production speed and finishing options, making it quick and simple to manage your projects.
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Model Making & Workshop team
Our model making and AP/AM workshop team deliver high-quality 3D printed and vacuum cast prototype parts. We offer next day dispatch on SLS, SLA and DLP. Request a quote for your next prototype project.
Tim Rowell
Quality & Operations Manager
Gemma Zouher-Lewis
RP Team Leader
Jordan Cooney
RP Technician
Chris Johnson
RP Technician
Leon Willis
Workshop Assistant/Delivery Driver
Adam Sharkey
Technical Project Manager
Alex Barnett
Senior RP Technician
Luke Webb
Senior 3D CAD Technician
Oliver Pringle
3D CAD Technician