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MJF 3D printing service

Upload your CAD files, receive an instant HP Multi Jet Fusion 3D printing quote and get your parts into production in less than 5 minutes.

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Functional partsIsotropic propertiesLead times from 2 days

What is MJF?

Multi Jet Fusion (MJF) is HP’s proprietary 3D printing process.


In MJF, parts are built by jetting a binding agent onto thin layers of polymer powder particles (typically nylon) and then sintering them using an IR heat source.


MJF produces functional plastic parts with isotropic mechanical properties that can be used for detailed prototyping or end-use low-volume production.

mjf factory
Choose MJF for: Choose a different process for:
High-accuracy functional prototypes from engineering materials Low-cost visual prototypes for form and fit
(choose FDM or SLA/DLP)
Cost-effective, low-volume production of end-use parts for 10 to 300 units Production volumes that exced the 500 units
(choose Injection molding)
Isotropic parts with complex geometry (no need for support structures) Parts with tight tolerances
(choose CNC machining)

Ideal MJF applications

Our in-house manufacturing experts recommend using MJF for the following use cases.

Functional prototyping

MJF is ideal for fabricating functional prototypes from durable, chemically resistant engineering thermoplastics.


Requirements

Strength: Medium/High

Appearance: Smooth surface

Quantity: 1 - 5 parts

3DP 101 - MJF nylon part

Low-volume production

MJF is cost-competitive to injection molding for low-volume manufacturing of end-use plastics parts for quantities up to 300 units.


Requirements

Strength: Medium/High

Appearance: Injection molding-like

Quantity: 10-300 units

HP on HP mjf parts

Our MJF 3D printing capabilities

From prototyping to small-batch production, our global network of certified MJF 3D printing facilities will allow you to produce highly accurate parts with quality comparable to injection molding.

Upload your CAD file for a free quote and manufacturability review and get your parts into production in less than 5 minutes.

Capabilities Description
Maximum build size * 380 x 285 x 380 mm (14.9'' x 11.2'' x 14.9'')
Standard lead time * 6 business days
Dimensional accuracy ± 0.3% with a lower limit on ± 0.3 mm (0.012'')
Layer thickness 100 μm

* For expedited shipping or parts that exceed the maximum build size contact sales@3dhubs.com

Available materials

MJF produces parts from engineering thermoplastics. Here is the list of our standard MJF 3D printing materials.

Material Description
Nylon 12 (PA 12) Nylon 12 is a robust thermoplastic with all-around excellent physical properties and chemical resistance, ideal for functional prototypes and end-use applications.

Datasheet
Nylon 11 (PA 11) Nylon 11 is a bioplastic with simillar properties to Nylon 12, produced from renewable materials that are derived from vegetable oils.

Datasheet
Glass-filled Nylon (PA 12 GF) Glass-filled nylon is reinforced with glass bead and creates parts with higher stiffness and thermal stability than standard nylon.

Datasheet

Surface finishes

Additional post processes can be applied to improve the appearance or mechanical properties of parts produced with MJF.

Gray

As printed MJF parts are typically grey in color and have a smooth surface, without visible layers, and a powder texture.

4-MJF-grey
Black

MJF parts are dyed black by immersing in a warm color bath. The color penetration reaches an approximate depth of 0.5 mm and covers all surfaces.

4-MJF-black

The following finishes are available by contacting sales@3dhubs.com

Finish Description
Smoothing The parts are placed in a tumbler that contains small ceramic chips, gradually eroding its surface down to a polished injection molding-like finish
Bead blasting Bead blasting (shot pinning) adds a uniform matte or satin surface finish on a 3D printed part, removing all layer lines
Watertightning MJF parts are impregnated with resin, sealing all internal porosity, ensuring watertightness
Metal plating Electroless metal plating (nickel, copper or gold) is ideal for prototypes that require a metallic appearance

Design guidelines for MJF

The table below summarizes the recommended and technically feasible values for the most common features encountered in 3D printed parts.

Feature Recommended size
Unsupported walls 1.0 mm (0.040'')
Supported walls 0.7 mm (0.030'')
Minimum detail size 0.25 mm (0.010'')
Minimum hole size 1.0 mm (0.040'')
Moving parts 0.5 mm (0.020'') between moving surfaces
Assembly clearance 0.4 mm (0.016'') between mating surfaces
Maximum wall thickness 20 mm (0.8'')

For thicker parts, make them hollow and add at least two escape hole for powder removal with a min. diameter of 8 mm (0.3'').

Learn more about the process in our Knowledge Base article.

Galip Okan Ozturk, EMEA Strategic Account Manager Galip Okan Ozturk EMEA Strategic Account Manager
Polly Calhoun, US Strategic Account Manager Polly Calhoun US Strategic Account Manager
David Nguyen, EMEA Sales Engineer David Nguyen EMEA Sales Engineer

3D Hubs for Business

Get in touch with our sales representatives to set up your company account and access these services:

  • NET30 payment terms
  • Non-disclosure agreements
  • Additional services: sheet metal, urethane casting and part marking
  • Design verification program (learn more)
  • Dedicated account manager
  • ISO 9001, material certifications, test reports and full dimensional reports

Contact Sales or call us directly on

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