Metal Binder Jetting
Fast and affordable metal 3D printing. Complex geometries, excellent detail, and cost-effective production without support structures.
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Fast and Affordable Metal Parts
Metal Binder Jetting is a 3D printing technology that creates complex metal parts by selectively depositing a binding agent onto layers of metal powder. The bound powder forms a "green part" which is then sintered in a furnace to achieve final density and strength.
Unlike laser-based metal printing, binder jetting parts are supported by the surrounding loose powder during printing, eliminating the need for support structures. This enables complex geometries, overhangs, and internal features without the post-processing challenges of support removal.
With large build volumes and high printing speeds, binder jetting is an excellent choice for cost-sensitive applications, batch production, and parts where the economics of DMLS are prohibitive.
Binder Jetting Capabilities
| Build Size | 400 x 250 x 250mm (15" x 10" x 10") |
| General Tolerances | ±0.3mm + 0.3% (shrinkage 0.8-2.5% during sintering) |
| Layer Height | 100 microns (0.004") |
| Surface Roughness | Ra 0.8-5 µm (30-200 µin) depending on orientation and finish |
| Part Density | 95-98%+ homogeneous density |
| Minimum Feature Size | 1.0mm (0.04") |
Parts may shrink 0.8-2.5% during sintering. Internal features like holes may shrink up to 5%. Design with shrinkage compensation in mind.
How Metal Binder Jetting Works
The process begins with a thin layer of metal powder spread across the build platform. A printhead then selectively deposits liquid binding agent onto the powder, bonding particles together in the shape of the part's cross-section.
This layer-by-layer binding continues until the complete "green part" is formed within the powder bed. The green part is then carefully removed and cured to strengthen the binder.
Finally, parts are placed in a sintering furnace where the binder burns off and metal particles fuse together at high temperature, achieving 95-98%+ density. Some processes use bronze infiltration as an alternative to sintering.
Binder Jetting Materials
Stainless steel alloys optimized for the binder jetting process.
316L Stainless Steel
Single-alloy stainless steel with excellent corrosion resistance and fine feature detail. 98%+ density after sintering.
Medical devices, jewelry, consumer products, functional prototypes
17-4 PH Stainless Steel
Precipitation-hardening stainless steel with high strength and good corrosion resistance. Heat treatable for enhanced properties.
Industrial components, aerospace, automotive, tooling
Surface Finish
Standard Zirconia Bead Blast
Parts are post-processed with a zirconia-based ceramic bead blast finish. This process mildly peens the surface without significantly altering fine features or dimensions, resulting in a uniform, matte, light gray appearance with a slightly satin-like texture.
Custom finishing options including polishing and coating are available upon request.
Design Guidelines
| Feature | Recommendation |
|---|---|
| Unsupported Walls | 1.0mm (0.04") minimum |
| Supported Walls | 1.0mm (0.04") minimum |
| Minimum Feature Size | 1.0mm (0.04") |
| Minimum Hole Diameter | 1.0mm (0.04") |
| Escape Hole Diameter | 4.0mm (0.157") minimum |
| Minimum Font Size | Arial 26pt or greater |
Design Considerations
- • Scale CAD models 1-2% larger to compensate for sintering shrinkage
- • Enlarge holes and internal features to account for additional shrinkage
- • Include escape holes (4mm+) for trapped powder removal
- • Avoid very thin walls and fine features that may not survive sintering
Best Applications for Binder Jetting
Rapid Tooling
Strong and affordable metal parts ideal for fixtures, jigs, and manufacturing aids.
Functional Prototyping
Fast and cost-effective metal prototypes for form, fit, and functional testing.
Production Parts
Dense, durable metal components suitable for end-use applications and batch production.
Benefits of Metal Binder Jetting
Cost-Effective
Produce metal parts at a fraction of the cost of DMLS or traditional machining.
No Support Structures
Parts are supported by surrounding powder, eliminating support removal and scarring.
Large Build Volume
Bigger build area enables printing multiple parts or larger components in a single run.
Complex Geometries
Create intricate designs, internal features, and fine details not possible with machining.
Fast Turnaround
High-speed printing and efficient post-processing deliver parts quickly.
Excellent Detail
Fine layer resolution produces sharp edges, crisp text, and detailed surface features.
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Endless Options
Choose from multiple stainless steel alloys with various finishes and post-processing options for your specific requirements.
Easy to Use
Get metal parts delivered to your door without the hassle of sourcing, project management, or logistics coordination.
Certified Quality
ISO 9001:2015, ISO 13485, and AS9100D certified partners ensure consistent, high-quality results on every order.
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