MJF VS SLS
Characteristics, Differences, and Applications
MJF vs SLS: 3D Printing Process Comparison
Multi Jet Fusion (MJF) and Selective Laser Sintering (SLS) are two of the most widely used powder-based 3D printing technologies for functional nylon parts. Both produce durable components, but each process offers unique advantages depending on your application, production goals, and surface finish requirements.
| Feature | MJF | SLS |
|---|---|---|
| Surface Finish | Smoother and more uniform finish | Slightly rougher textured surface |
| Part Strength | Excellent strength with high consistency | Strong and durable functional parts |
| Production Speed | Faster production for larger volumes | Efficient for complex geometries and batches |
| Detail Resolution | Sharp detail with consistent accuracy | Very good detail for intricate designs |
| Best For | Production parts and end-use applications | Functional prototypes and durable components |
Which Process Should You Choose?
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- Choose MJF if you need smoother finishes, fast production, and scalable manufacturing.
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- Choose SLS if you want durable nylon parts with strong design flexibility and proven performance.
Process Details
Multi Jet Fusion Machine Capabilities
Maximum build size |
Standard lead time |
Tolerance |
Layer height |
Minimum feature size |
| 380mm x 280mm x 380mm | 4-5 business days |
(X,Y): +\- 0.300mm or 100mm +\- 0.3% (Z): +\- 0.400mm or > 100mm +\- 0.4% |
80 μm | 1 mm |
Selective Laser Sintering Machine Capabilities
Maximum build size |
Standard lead time |
Tolerance |
Layer height |
Minimum feature size |
| 340mm x 340mm x 600mm (Nylon) | 6 business days | (X,Y): +\- 0.300mm or 100mm +\- 0.3%
(Z): +\- 0.400mm or > 100mm +\- 0.4% |
120 μm | 1 mm |
| 700mm x 580mm x 380mm (Polyurethane) | 12 business days | (X,Y): +\- 0.3mm or 100mm +\- 0.3%
(Z): +\- 0.4mm or 100mm +\- 0.4% |
120 μm | 1 mm |
Available materials
MJF Materials
Material |
Default Color |
Resolution |
Weaknesses |
Strengths |
Common Applications |
| Nylon PA 12 | Grey | 80μm | Occasional defects | Efficient cost | Prototypes, test parts |
| Nylon PA 12 S | Grey | 80μm | Strength Difference | Aesthetics | Prototypes, test parts |
| Nylon PA 11 | Grey | 80μm | Surface defects | Chemical resistance | Prototypes |
| Glass-Filled | Grey | 80μm | Higher cost | Excellent strength | Complex parts |
SLS Materials
Material |
Default Color |
Resolution |
Weaknesses |
Strengths |
Common Applications |
| Nylon PA 2200 | white | 120 µm | slightly higher cost | superior strength | complex geometries |
| Nylon PA 12 | recycled white | 120 µm | possible defects | cheaper cost | prototypes |
| Polyurethane | white | 120 µm | longer lead time | flexible material | medical braces |
FAQ’s
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What is the difference between MJF and SLS?
MJF (Multi Jet Fusion) uses fusing and detailing agents combined with heat to create parts, while SLS (Selective Laser Sintering) uses a laser to fuse powdered nylon material layer by layer. Both processes produce strong functional parts but differ in finish, speed, and production efficiency.
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Is MJF stronger than SLS?
MJF parts are often slightly more consistent in mechanical properties and can offer excellent isotropic strength. SLS parts are also highly durable and widely used for functional applications and end-use components.
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Which process has a better surface finish?
MJF typically produces a smoother and more uniform surface finish straight from the printer. SLS parts usually have a rougher, more textured appearance due to the laser sintering process.
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Is MJF or SLS better for production runs?
MJF is often preferred for higher-volume production because of its faster build speeds and efficient nesting capabilities. SLS is also effective for batch production, especially for complex geometries and custom applications.
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Which process is more cost-effective?
Cost depends on part geometry, quantity, and material requirements. MJF can be more cost-efficient for larger production volumes, while SLS remains a strong option for prototypes and lower-volume functional parts.
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What materials are available for MJF and SLS?
Both processes commonly use nylon-based materials such as PA12 and PA11. MJF also supports specialty materials like glass-filled and ESD-safe nylons depending on the manufacturer.
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Should I choose MJF or SLS for my project?
Choose MJF if you need smoother surfaces, production scalability, and consistent part quality. Choose SLS if you need durable functional parts, complex geometries, and proven versatility across industries.
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