HP Multi Jet Fusion (MJF) 3D Printing Service

Top Proto operates HP Jet Fusion 5200-series systems to produce high-density nylon parts with tolerances of ±0.2 mm and near-isotropic mechanical properties. Multi Jet Fusion (MJF) uses inkjet-deposited fusing and detailing agents combined with infrared energy to fuse entire powder layers simultaneously, achieving faster build speeds and more uniform mechanical properties than point-by-point laser sintering. MJF is engineered for production-scale additive manufacturing, delivering consistent part quality from single prototypes through batches of thousands.

Upload your CAD file for an instant MJF quote. Standard orders ship within 4 business days.

Get instant pricing, project lead times, and DFM feedback.

Accepted File Types: STEP, STP, SLDPRT, STL, DXF, X_T, X_B, IPT, CATPART, PRT, SAT, 3MF, JT

What Is HP Multi Jet Fusion (MJF)?

HP Multi Jet Fusion is a powder bed fusion process that builds parts through a combination of chemical agents and infrared energy. An inkjet array deposits a fusing agent onto the areas of each powder layer that correspond

to the part cross-section, along with a detailing agent at part boundaries to control edge definition. An infrared lamp then passes over the entire build surface, and the fusing agent absorbs the infrared energy to melt and fuse the underlying powder. Areas without fusing agent remain loose powder.

This full-layer fusing approach produces parts with approximately 95% isotropy, meaning mechanical properties are nearly identical in all build orientations. The detailing agent creates sharp boundaries between fused and unfused regions, resulting in crisper edges and finer text than laser-based powder processes. Like SLS, MJF requires no support structures because the surrounding powder supports each layer.

HP’s voxel-level control enables density and property variation within a single part, opening the door to graded structures and optimized infill strategies that are not possible with other powder bed processes.

Production Parts

High-throughput manufacturing of functional nylon components. MJF’s optimized nesting algorithms and fast build speeds deliver the lowest cost per part in polymer additive manufacturing for volumes of 50 to 10,000+ units.

Functional Prototyping

Engineering prototypes with production-equivalent mechanical properties. MJF PA12 matches injection-molded nylon performance for fit testing, assembly verification, and field trials.

Mass Customization

Each part in an MJF build can be unique without tooling changes. Medical devices, consumer products, and industrial components can be individually customized across large production batches.

Bridge Manufacturing

Production-quality parts manufactured while injection mold tooling is being built. MJF bridges the gap between prototype approval and steel-tool production with zero tooling investment.

Our MJF 3D Printing Services

Why Choose Top Proto for MJF 3D Printing?

Faster Build Speeds

MJF fuses entire layers simultaneously rather than tracing each cross-section with a point laser. This delivers 1.5–2× faster build times than SLS for equivalent part volumes, reducing lead times and cost per part.

95% Isotropic Properties

MJF’s uniform thermal processing produces parts with nearly identical mechanical properties in all directions. This eliminates the orientation-dependent strength variations common in other 3D printing processes.

Sharp Edge Definition

The detailing agent creates precise boundaries between fused and unfused powder, producing sharper edges, finer text legibility down to 0.5 mm, and crisper small features than laser sintering.

80% Powder Reuse

HP’s powder management system recycles up to 80% of unused powder from each build, reducing material cost and waste while maintaining consistent mechanical properties across production runs.

MJF Capabilities

Parameter	Specification
Technology	Powder Bed Fusion (Inkjet Fusing Agent + IR Energy)
Build Volume	380 × 284 × 380 mm
Layer Thickness	80 μm
Tolerance (Standard)	±0.2 mm or ±0.2% (whichever is greater)
Tolerance (Production)	±0.1 mm achievable with engineering review
Minimum Wall Thickness	0.5 mm (1.0 mm recommended)
Minimum Feature Size	0.5 mm
Surface Finish	Ra 6 – 10 μm (as-printed, bead-blasted)
Post-Processing	Bead blasting, vapor smoothing, dyeing, painting, CNC finishing

MJF Part Gallery

Our MJF production portfolio includes batches of 2,000+ cable management clips for a consumer electronics company, prosthetic socket components with patient-specific geometry, automotive interior trim panels with integrated snap features, and drone chassis frames with consolidated part counts. MJF’s combination of throughput, isotropic strength, and fine detail makes it our primary recommendation for production-volume polymer additive manufacturing.

MJF for Rapid Tooling

MJF nylon parts function as production tooling aids including assembly fixtures, alignment jigs, and go/no-go gauges. PA12 Glass Beads provides the stiffness and dimensional stability needed for fixtures that interface with CNC-machined metal components. Because MJF builds complete in hours rather than the days required for machined tooling, replacement fixtures can be designed, printed, and deployed within a single shift.

MJF for Production Manufacturing

HP Multi Jet Fusion was engineered from the ground up for production additive manufacturing. The HP 5200-series platform processes full build volumes in under 12 hours, with automated powder management and quality monitoring systems. For applications where injection mold tooling costs are prohibitive, where part customization is required, or where production volumes fall below the tooling break-even point, MJF delivers production-equivalent parts without tooling investment

Frequently Asked Questions HP Multi Jet Fusion

How does MJF compare to SLS?

MJF delivers 1.5–2× faster build times, slightly tighter tolerances (±0.2 mm vs. ±0.3 mm), and approximately 95% isotropic properties compared to 85% for SLS. SLS offers a wider material selection including glass-filled and carbon-filled options. Both processes are support-free.

What tolerances does MJF achieve?

Standard MJF tolerances are ±0.2 mm or ±0.2% of the nominal dimension, whichever is greater. With engineering review and production optimization, tolerances of ±0.1 mm are achievable on qualifying features.

Are MJF parts inherently gray?

Yes. The carbon-black fusing agent produces naturally gray parts. Post-processing options include dyeing (black is standard, custom colors available), painting, and vapor smoothing to achieve desired color and finish.

What is the maximum production volume for MJF?

There is no hard volume ceiling. MJF excels at volumes from 50 to 10,000+ parts per order. Beyond 10,000 units, injection molding typically becomes more cost-effective per part, though MJF remains competitive when part customization or fast turnaround is required.

Can MJF replace injection molding?

For volumes below the injection mold tooling break-even point (typically 5,000–10,000 parts depending on complexity), MJF delivers equivalent functional performance without tooling investment. MJF is also used for bridge production while mold tooling is being manufactured.

CNC Manufacturing Resources

Technical guides and process comparisons from the Top Proto engineering team, covering material selection, process decision frameworks, and manufacturing design principles for engineers and product developers.