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Stereolithography (SLA) is a powerful 3D printing technology that produces extremely accurate and high-resolution parts that are capable of being used directly in end-use, low-volume production, or for rapid prototyping. Xometry offers over 15 uniquely engineered SLA materials that can enable products to be brought to the market
|Material Name||Description||Flexural Strength (MPa/KSI)||Elongation at Break (%)||HDT@0.46 MPa (°C)|
|Accura 25||White, PP-like||58 MPa/KSI||20%||63 °C|
|Accura ClearVue||Clear/Translucent, PC-like||67 MPa/KSI||7%||46 °C|
|Somos Watershed Black||Black/Dark-Grey, ABS-like||69 MPa/KSI||15%||50 °C|
|Somos WaterShed XC 11122||Clear/Translucent, ABS-like||69 MPa/KSI||15%||50 °C|
|Somos EvoLVe 128||White, ABS-like||70 MPa/KSI||11%||52 °C|
|Accura Xtreme Grey||Grey, ABS-like||71 MPa/KSI||22%||62 °C|
|Somos NeXt||White, PP-like||71 MPa/KSI||10%||57 °C|
|Somos ProtoGen 18420||White, ABS-like||71 MPa/KSI||16%||47 °C|
|Somos Taurus||Dark Gray, ABS-like||74 MPa/KSI||24%||62 °C|
|Accura ABS Black (SL 7820)||Black (painted), ABS-like||78 MPa/KSI||13%||51 °C|
|Accura Xtreme White 200||White, ABS-like||79 MPa/KSI||20%||47 °C|
|Somos WaterClear Ultra 10122||Clear/Translucent, PC-like||84 MPa/KSI||7%||47 °C|
|Accura 60||Clear/Translucent, PC-like||101 MPa/KSI||13%||55 °C|
|Somos ProtoTherm 12120*||Translucent Red, PC-like||109 MPa/KSI||4%||126 °C|
|Accura 48HTR*||Translucent Amber, PC-like||118 MPa/KSI||7%||130 °C|
|Somos PerFORM*||White, Ceramic-filled||146 MPa/KSI||1%||268 °C|
|Accura Bluestone*||Blue, Ceramic-filled||154 MPa/KSI||2%||284 °C|
Supported surfaces will be lightly sanded with 220 or 320 grit sandpaper, then media blasted for a uniform matte finish.
Supported surfaces will be lightly sanded with 220 or 320 grit sandpaper for improved surface quality. Sanding scratches will be visible on supported surfaces.
Supported areas may show small grid-like dots or surface blemishes as a result of support removal.
Available for Accura ClearVue. Only supported surfaces are sanded. Parts will still have visible layering. High gloss clear coat is applied to enhance natural clarity.
Xometry provides additional SLA finishing options, including but not limited to sanding, polishing, painting, post thermal processing, and plating to meet your needs.
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The speed, accuracy, and great surface finish of SLA parts lets product developers create physical snapshots of their designs through the iterative process.
SLA can be used to create fully-functional prototypes, with materials that can simulate polypropylene, polycarbonate, ABS, and rigid composites.
The high accuracy and consistency of SLA makes it an ideal way to build large quantities of discrete or customized parts.
SLA is a go-to choice for 3D printed models that require accurate features and a smooth surface finish. Xometry offers both standard and high-resolution options for fine detail parts, and can also print larger sized parts and products, offering up to a 29" inch build area. With the ability to produce complex features with good mechanical properties, SLA 3D prints are often used for final fit checks before moving to injection molding services.
In addition, Xometry's manufacturing partner network allows us to offer a larger variety of materials than other 3D printing companies - we offer a wide range of both Accura and Somos brand materials.
|Description||Standard Resolution||High Resolution|
|General Tolerances||XY plane: +/- 0.005” for the first inch, plus +/- 0.002” for every inch thereafter. Z plane: +/- 0.010” for the first inch, plus +/- 0.002” for every inch thereafter.||XY plane: +/- 0.005” for the first inch, plus +/- 0.002” for every inch thereafter. Z plane: +/- 0.010” for the first inch, plus +/- 0.002” for every inch thereafter.|
|Build Envelope||29” x 25” x 21”||10” x 10” x 10”|
|Minimum Feature Size||0.020" (Recommended 0.030")||0.020"|
The table below depicts the general tolerances for industrial-grade stereolithography (SLA) services. Stresses during the build, support strategy and other geometry considerations may cause deviation in tolerances and flatness. Improved tolerances may be possible with a manual quote review, after successful completion of a prototype build, and must be approved on a case-by-case basis. Please check out Xometry's Manufacturing Standards for more information on tolerances per process.
How Stereolithography Works
SLA is an additive manufacturing process that uses ultraviolet (UV) light on a vat of liquid photopolymer resin to selectively solidify part features, building the part layer by layer. The UV light continues this process through the entire vat of resin, selectively curing and solidifying the resin to match the design of the CAD file. Structural supports are created during the pre-build setup process and manually removed after the print is completed. The parts are then washed in a solvent solution to remove uncured resin, and then receive a final post-cure in a UV light oven.
SLA offers higher resolution printing than many other 3D printing technologies, allowing customers to print parts with fine details and surface finishes. SLA 3D printing is a highly-versatile platform for making custom parts in prototype and production settings, often acting as a stand-in for injection molded parts.
Applications of Stereolithography
With a broad range of suitable materials and a rapid turnaround for even complex net-shapes, stereolithography is an ideal tool for a broad range of manufacturing sectors. It is primarily used in auto-engineering, as it enables the cost-effective generation of intricate parts with various surface finishes and fine detailing. Parts can be embossed or engraved, with matte, natural, and myriad other finishes available depending on the manufacturing requirements. While its primary success has been in rapid prototyping and design assistance for the automotive sector, stereolithography is rapidly being adopted at scale in various mechanical modeling sectors.
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