MJF 3D Printing Service
Need industrial nylon parts without tooling? JawsTec’s MJF 3D printing service runs HP Multi Jet Fusion for functional prototypes and end-use production—tight tolerances, fine detail, and no support structures. We’re an HP-recognized provider with ISO 9001:2015-compliant operations in American Falls, Idaho. Standard turnaround is 4–5 business days; select PA12 and PA12 S jobs can ship in as little as 2 days.
What Is MJF 3D Printing?
Multi Jet Fusion (MJF) is an industrial 3D printing, additive manufacturing, process that uses nylon powder and precision fusing and detailing agents to create strong and accurate parts. MJF 3D printing is used in various industries today including automotive, aerospace, healthcare, and consumer goods to name a few. MJF 3D printing is widely used for durable prototypes and end-use production parts because it delivers excellent mechanical strength, tight tolerances, and fine surface detail without the need for support structures. It is a cost-efficient, low-waste solution for mass customization, functional prototypes, and components that require durability and dimensional accuracy.
How Does MJF 3D Printing Work?
Additive manufacturing builds a part layer by layer. The process starts with a thin layer of nylon powder, spread across the build platform, and then a printhead selectively applies a fusing agent to define the part’s shape and a detailing agent to improve edge definition and surface accuracy. Infrared energy then passes over the build area, melting the treated powder into a solid layer while the untreated powder remains loose and acts as natural support material. This sequence repeats until the fully formed part is built within the powder bed.
MJF 3D Printing Capabilites
| Maximum Build Size | Layer Thickness | Min Wall/Feature Size | Tolerance | Lead-Time |
| 380mm x 280mm x 380mm | 80 μm | 1 mm | (X,Y): +\- 0.300mm or 100mm +\- 0.3%
(Z): +\- 0.400mm or > 100mm +\- 0.4% |
Standard: 4-5 Business Days Expedited: As fast as 2 days (PA12, PA12 S) |
MJF 3D Printing Materials
JawsTec offers a variety of 3D printing materials in the MJF process
| Material | Characteristics |
| Nylon PA 12 | Default workhorse; strong, chemical-resistant, cost-efficient for prototypes and production |
| Nylon PA 12 S | Smoother as-printed surface when cosmetics matter |
| Nylon PA 11 | bio-based nylon; better impact/ductility for living hinges and snap fits |
| Glass-Filled | Higher stiffness for jigs, fixtures, and load-bearing parts |
Post-Processing and Surface Finish Options for MJF Printed Parts
We offer 3 types of surface finishes for MJF Printing
Raw
Part is taken from machine and excess powder is removed
Polished
Part is tumbled and then shot-peened providing a smooth surface
Vapor Polished
Parts are smoothed in a machine, providing an injection-molded surface look
MJF vs SLS: Which is better?
| Process | Characteristics | When to Choose |
| MJF | Finer as-printed surface, faster builds, grey PA12 default, 80 μm. | If you need smoother finishes, fast production, and scalable manufacturing.
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| SLS | white PA2200, larger build on P770, 120 μm, often preferred for big one-offs | If you want durable nylon parts with strong design flexibility and proven performance. |
Why Choose MJF 3D Printing?
Multi Jet Fusion shines when you need strong, repeatable nylon parts without molds—whether that’s one prototype or a short production run.
Jigs, fixtures, and shop tooling
Print custom fixtures, nestings, and assembly aids that survive daily use on the floor. Glass-filled nylon adds stiffness when clamps and locators take real load.
Housings, enclosures, and brackets
MJF PA12 holds fine detail and consistent dimensions, so covers, sensor mounts, and wire-routing brackets fit the first time—and hold up as end-use parts, not just mockups.
Low-volume and bridge production
Skip tooling while you validate demand. Run dozens or hundreds of the same part, then move to molding only when volume justifies it. No minimum order.
Automotive and mobility
Interior mounts, ducting prototypes, under-hood brackets, and custom fixtures for assembly lines—functional nylon without waiting on cut tooling.
Aerospace and UAV components
Lightweight brackets, fairings, and drone structures where geometry is complex and lead time matters. (We support ITAR-compliant work from our Idaho shop.)
Healthcare and device enclosures
Durable housings, trays, and non-implant instrument parts that need chemical resistance and a clean, production-like finish after vapor polish or dye.
How to Design Parts for MJF — Guidelines for Better Prints and Fewer Revisions
- Min wall 1 mm
- Escape holes for hollow parts
- Avoid trapped powder pockets
- Living hinges ~0.65 mm (validate on PA11/PA12)
- Threads: design for inserts rather than printed threads
MJF Guides, Case Studies & Further Reading
Visit the links on the right to learn more about MJF 3D printing! Or, you can visit our blog to explore other helpful articles and information.
Want to learn more about MJF?
Multi Jet Fusion FAQ’s
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What is Multi Jet Fusion (MJF)?Multi Jet Fusion (MJF) is an industrial 3D printing technology developed by HP. It produces functional nylon parts with high detail, strength, and consistency.
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What is the resolution of your parts?Our layer thickness is 80 microns for MJF, but we offer 120 microns in SLS.
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What printers do you print with?We use the MJF 5600 Pro/5210 machines from HP, along with the EOS P396/P770 and XYZ 230 machines.
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What wall thickness should my parts have?Your parts should have a minimal wall thickness of 1mm.
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What is the difference in MJF and SLS printing?MJF processes use a binding agent to solidify layers of powder according to a computer reading a CAD file. SLS printing works by solidifying the powder layers with a laser according to a computer reading a CAD file.
Beyond MJF: SLS, SLA & Metal 3D Printing Also Available
SLM
Need to print some metal parts? We’ve got you covered with our SLM printing technology.
- Lightweight metal parts
- Highly customizable metal parts
SLS
Looking for another option to print nylon parts? Check out the SLS process
- Dimensional accuracy
- Chemical resistance
SLA
Want to try a whole new printing process? Take a look at SLA technology.
- Superior strength and durability
- Smooth raw surface