Fast, highly repeatable batch production with consistent part-to-part accuracy
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Mjf 3d Printing
MJF 3D Printing Service
MJF (Multi Jet Fusion) is a powder-bed fusion process developed by HP that, like SLS, builds nylon parts layer by layer, but instead of a laser it uses inkjet arrays to deposit a fusing agent onto the powder bed and then passes an infrared energy source over it to fuse those areas.
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SKU: BOTBIT-MFG-04 ยท Best for: Repeatable functional prototypes and end-use nylon parts
Overview
About MJF 3D Printing Service.
MJF (Multi Jet Fusion) is a powder-bed fusion process developed by HP that, like SLS, builds nylon parts layer by layer, but instead of a laser it uses inkjet arrays to deposit a fusing agent onto the powder bed and then passes an infrared energy source over it to fuse those areas. A detailing agent is jetted around the edges to sharpen features and control heat, giving MJF parts fine, consistent edges. Because the whole layer is fused at once rather than traced by a laser, MJF is typically fast and highly repeatable, working directly from your CAD or STL file with no supports needed.
BotBit's MJF service in India prints in engineering nylons such as PA12 for strong, watertight functional parts, PA11 for greater ductility and impact resistance, glass-bead-filled nylon for added stiffness, and flexible TPU for rubber-like components. Parts have a fine matte finish, dense and largely isotropic mechanical properties, and tight, uniform accuracy thanks to the even thermal processing and precise agent placement. As with SLS, un-sintered powder supports the build, so complex geometries print freely, and enclosed cavities should include escape holes for powder removal. Standard MJF nylon is commonly finished in a deep grey/black.
MJF suits engineers and manufacturers who want repeatable, functional nylon parts with consistent accuracy for both prototyping and small-to-mid volume production. Choose MJF when you need uniform quality across a batch, watertight walls, or slightly tighter dimensional consistency than SLS. For the finest cosmetic surface, SLA resin is better; for metals or very tight tolerances, consider metal printing or CNC. Upload your model to request an instant or RFQ quote.
Key features
Why it stands out.
Support-free complex geometry, thanks to powder-bed self-support
Dense, largely isotropic nylon parts with fine, uniform edge detail
Engineering PA12, ductile PA11, stiff glass-bead nylon and flexible TPU options
Fine matte finish that is watertight and dyes evenly, often deep grey/black
Specifications
Selection facts.
| Process | Multi Jet Fusion (inkjet-agent powder-bed fusion) |
|---|---|
| Typical materials | Nylon PA12, PA11, glass-bead nylon, TPU |
| Strengths | Repeatable accuracy, speed, isotropic strength |
| Surface finish | Fine matte, uniform; commonly grey/black |
| Detail & accuracy | Consistent, uniform accuracy across the batch |
| Design notes | No supports; add escape holes for enclosed cavities |
| Best for | Functional parts, repeatable batches, low-to-mid volume |
| Lead time | Varies by job size, material and quantity |
Applications
Where it is used.
- Repeatable functional prototypes and end-use nylon parts
- Small-to-mid volume production without tooling
- Complex, consolidated assemblies and lattices
- Watertight or airtight housings and ducts
- Flexible TPU parts such as grips, seals and living hinges
- Drone, UAV and UGV brackets, clips and enclosures
Buying guide
How to choose.
To request a quote, upload your 3D model with quantity, chosen nylon or TPU grade and any critical dimensions or fits. MJF builds complex, support-free geometry and is well suited to repeatable batches, so it is a strong choice when many identical parts must match closely. Include escape holes on enclosed cavities so trapped powder can be removed, and flag any watertight or airtight requirements so we can confirm wall design.
Match the material to the job. PA12 is the dense, watertight workhorse for functional parts; PA11 adds ductility and impact resistance; glass-bead nylon increases stiffness and thermal stability; and TPU gives flexible, rubber-like behaviour for grips, seals and hinges. Standard nylon is usually supplied in grey/black and can be dyed. Tell us the loads, flexibility and environment so we can recommend the best grade and orientation.
MJF is the right pick when you value repeatable accuracy and consistent quality across a batch, along with support-free design freedom, for both prototypes and low-to-mid volume production. If cosmetic surface finish is paramount, consider SLA; for metals or the tightest tolerances, consider metal printing or CNC. Send your files for an instant or RFQ quote with material and lead-time options.
FAQ
Common questions.
How is MJF different from SLS?
Both are nylon powder-bed processes needing no supports, but SLS traces each layer with a laser while MJF jets a fusing agent and fuses the whole layer with infrared energy, plus a detailing agent for sharp edges. MJF tends to be faster and gives very consistent, uniform accuracy across a batch. We will advise which fits your part, volume and finish needs.
Which MJF material should I choose?
PA12 is the dense, watertight default for strong functional parts; PA11 offers more ductility and impact resistance; glass-bead nylon adds stiffness and thermal stability; and TPU gives flexible, rubber-like parts. Tell us the loads, flexibility, and whether the part must be watertight, and we will recommend the most suitable grade and build orientation.
Are MJF parts watertight and functional?
Yes. MJF PA12 parts are dense and can be made watertight or airtight with appropriate wall thickness, and their largely isotropic strength suits functional and end-use applications. Share the pressure, loads and environment, and we will confirm wall design and material so the finished parts perform reliably in service.
What colour and finish do MJF parts have?
Standard MJF nylon has a fine matte finish and is typically a deep grey or black straight off the machine. Parts can be dyed to other colours, tumbled for a smoother feel, or coated on request. If you need a specific colour or a finer cosmetic surface, tell us and we will plan the appropriate post-processing.
Is MJF good for production runs?
Very much so. MJF's speed and part-to-part consistency make it well suited to small-to-mid volume end-use production without tooling, as well as prototyping. It bridges the gap to injection moulding for quantities that would not justify a mould. Share your target volume and we will advise whether MJF is the most economical route.
Do MJF parts need powder escape holes?
For enclosed or hollow features, yes. Un-sintered powder fills internal cavities during the build and must be removed afterwards, so well-placed escape holes are needed. We can review your model and suggest hole positions and sizes, or recommend minor design tweaks to ensure clean, fully de-powdered parts.
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