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Privacy: All your files are secure with us. Read our privacy policy.Selective laser sintering (SLS) is an industrial 3D printing process that produces accurate prototypes and functional production parts in as fast as 1 day. Multiple nylon-based materials and a thermoplastic polyurethane (TPU) are available, which create highly durable final parts that require heat resistance, chemical resistance, flexibility, or dimensional stability. With SLS 3D printing, no support structures are required making it easy to nest multiple parts into a single build and an economical solution for when higher volumes of 3D-printed parts are required.
Common uses for selective laser sintering are:
- jigs and fixtures
- housings
- snap fits and living hinges
Vapor Smoothing is Here!
Vapor smoothing is now available for select 3D-printed nylon parts. The process eliminates rough surfaces and leaves a glossy, aesthetic finish on parts.
SLA Design Guidelines and Capabilities
Our basic guidelines for stereolithography include important design considerations to help improve part manufacturability, enhance cosmetic appearance, and reduce overall production time.
Compare Material Properties
| Material | Color | Tensile Strength | Tensile Modulus | Elongation |
|---|---|---|---|---|
| PA 11 Black (PA 850) | Black | 7.54 ksi | 261 ksi | 30% |
| PA12 Black | Black | 6.7 ksi | 276 ksi | 13% |
| PA 12 White (PA 650) | White | 7.25 ksi | 290 ksi | 11% |
| PA 12 Mineral-Filled (Duraform HST) | Light Gray | 5.51 ksi | 450 ksi | 3% |
| PA 12 40% Glass-Filled (PA 614-GS) | White | 7.25 ksi | 522 ksi | 5% |
| Polypropylene Natural | Natural | 2.61 ksi | 123 ksi | 15% |
| TPU 70-A | White | 580 psi | 210% |
*Properties listed are based on thermal cure
These figures are approximate and dependent on a number of factors, including but not limited to, machine and process parameters. The information provided is therefore not binding and not deemed to be certified. When performance is critical, also consider independent lab testing of additive materials or final parts.
Surface Finish for SLS Parts
Surface finish on SLS parts is typically rougher than other 3D printing technologies—it can range from 100-250 RMS. We also bead blasts the majority of customers’ parts to remove loose powder and create a smooth matte finish. Vapor smoothing is a post-processing option available for PA11 Black parts, which will result in surface finish roughness between 64 – 100 μin RA.
Material: PA12 40% Glass-Filled (PA614-GS)
Resolution: Normal (0.004 in. layer thickness)
Finish: Standard
Material: PA11 Black (PA850)
Resolution: Normal (0.004 in. layer thickness)
Finish: Standard
Our SLS 3D Printers
Our SLS equipment includes sPro140 machines, which have the world’s largest sintering build volume, and feature fully digital high-speed scanning systems, unparalleled process consistency, and closed systems for powder blending and delivery for reliable part quality. We also use sPro60 machines, which allow for multiple materials and high throughput.
