Powder Bed Fusion · MJF

MJF 3D Printing Service UK

Multi Jet Fusion (MJF) 3D printing from a UK additive manufacturer — production volume with injection-mould economics. Repeatable end-use nylon and TPU parts by the hundred, printed, dyed, smoothed and inspected under one roof, up to 380 × 284 × 380 mm. No tooling, no minimum order — the price per part falls as the bed fills, with instant online pricing on up to 100,000 parts. Rapid MJF nylon 3D printing for batch production and low-volume series production, from our own ISO 9001 facility.

Get an instant quote → Talk to our engineers

Prefer to talk it through? Call our engineers on 024 7736 0144.

King’s Award for Enterprise · International Trade 2026 · King’s Award for Enterprise · Innovation 2024 · ISO 9001 · Cyber Essentials · Made in the UK

380mm

Build volume

Production polymers

Support structures

5–7d

Turnaround

Specifications & lead times

MJF 3D printing specifications & lead times

MJF prices by the build, not the part. The powder holds the part up — nothing to design around, nothing to cut off — and every part nested in the bed shares its cost. One part costs what one part costs; three hundred cost a fraction of that each.

Reviewed by the RYSE 3D engineering team · August 2026.

MJF build volume densely nested with hundreds of nylon parts in three dimensions, showing how RYSE 3D packs the full bed to drop cost per part

Build envelope: 380 × 284 × 380 mmAll three materials — PA 12, PA 11 Gen2 and TPU 01 — in the full envelope, nested many at a time.
Technology: HP Multi Jet FusionStrong, functional, repeatable parts with excellent mechanical properties — designed for production.
Supports: None — geometry is freeThe powder supports the part: nothing to cut off, nothing to sand back, nothing witness-marking your A-surface.
Turnaround: 5–7 working daysPrinted, cooled, de-powdered, finished and inspected — not just off the machine. Confirmed at quote.
Finishing: Bead blasted · dyed · vapour smoothedGrey as standard, through-dyed black, or premium vapour-smoothed sealed surface — all in-house.
Bigger than the bed?: Split, bonded & inspected, or FDM at 900 mmWe split, print, bond and inspect the assembly, or move it to large-format FDM for parts up to 500 × 500 × 900 mm.
Volume: One-off to batch & series productionNo minimum order — a single part, or repeatable end-use parts by the hundred. Cost per part drops as the bed fills.
Online ordering: Instant pricing on up to 100,000 partsUpload your CAD — no waiting, no sales call.

Get an instant quote → Call 024 7736 0144

The basics

What is MJF (Multi Jet Fusion) 3D printing?

Multi Jet Fusion (MJF) is an HP powder bed fusion process that jets a fusing agent across a bed of nylon powder and fuses whole layers at once — no laser tracing part by part, no supports, no mould. That makes it fast, consistent and repeatable, which is why MJF is the process to reach for when a prototype has to become a hundred identical end-use parts: the three-hundredth part matches the first, and the price per part falls as the bed fills.

How does MJF 3D printing work?

Nest. Parts are packed in three dimensions through the full height of the bed — the fuller the bed, the lower the cost per part.
Jet & fuse. A fusing agent is jetted where the part should solidify, and the whole layer is fused at once under heat.
Layer. Fresh powder is spread and the cycle repeats through the build — no supports, because the powder holds every part.
Cool & de-powder. The build is cooled under control, then parts are excavated and cleaned of loose powder.
Finish. Bead-blasted grey, through-dyed black or vapour smoothed, as ordered.
Inspect. Dimensional inspection before the parts ship.

Technical data

MJF materials: PA 12 nylon, bio-based PA 11 and flexible TPU

Three production polymers, one process — rigid, ductile and elastic. Typical values; properties vary with geometry and orientation, so treat these as a guide rather than a guarantee.

Nylon 12

PA 12

The volume workhorse — watertight, dimensionally stable and the lowest cost per part. Also known as Nylon 12, Polyamide 12, PA2200, MJF nylon.

Tensile strength: 48 MPa
Elongation at break: 20%
Impact, notched: 3.5 kJ/m²
Heat deflection: 175 °C

Best for: housings, enclosures, ducting and watertight production parts.

Instant quote →More on PA 12 →

Bio-based Nylon 11

PA 11 Gen2

Impact-tough, ductile and bio-based — bends without breaking, with 80% powder reusability. Also known as Nylon 11, Polyamide 11, PA11 Gen2.

Tensile strength: 52 MPa
Elongation at break: 35%
Impact, notched: 6.0 kJ/m²
Powder reusability: 80%

Best for: snap-fits, living hinges, clips and parts that have to take a hit.

Instant quote →More on PA 11 Gen2 →

Elastomer

TPU 01

A Shore A 88-90 elastomer that stretches to nearly three times its length and springs back, with 63% rebound. Also known as MJF TPU, thermoplastic polyurethane, flexible nylon alternative.

Hardness: Shore A 88-90
Tensile strength: 9 MPa
Elongation at break: 291%
Tear resistance: 61 kN/m

Best for: lattices, cushioning, grips, seals and flexible end-use parts.

Instant quote →More on TPU 01 →

MJF impact figures are notched, quoted in kJ/m². Our SLS grades quote notched Izod to ASTM D256-10 in J/m and our FDM grades quote notched Charpy to ISO 179 in kJ/m² — different methods on different scales, so the numbers cannot be ranked against each other across processes. TPU 01 is an elastomer and its tensile figure is not comparable with the rigid nylons above.

Price your part → See all MJF materials

Finishing

MJF finishing services

Most MJF parts arrive grey. Yours don’t have to. Every finish happens in our building, on our machines — no third party in the chain, no extra week in the schedule.

As standard

Bead-blasted grey

Uniform matte grey, clean detail, ready to fit — the finish most bureaux stop at. Perfect for internal parts, fixtures and anything out of sight. Included.

Dyed black

Grey reads like a prototype; black reads like a product. Dyeing penetrates the surface, so it will not chip or flake off an edge the way paint does, and the colour is consistent across the whole batch.

Premium

Vapour smoothed

Chemically fuses the porous surface into a sealed, semi-gloss skin — kills the powdery texture, cuts surface roughness, and makes the part easier to clean and genuinely sealable.

Not sure which finish the part needs? Tell us where it ends up — on a shelf, in a hand, or in front of a customer — and we’ll spec it free with your quote. More on our finishing services.

Why MJF

Benefits of MJF 3D printing

Injection-mould economics

Production parts without the mould — no five-figure tooling, no eight-week wait, no minimum order.

Cost drops as the bed fills

Priced by the build, not the part — nest the whole bed and the price per part falls.

Repeatable end-use parts

The three-hundredth part matches the first — consistent, functional, ready for real-world use.

Geometry is free

No supports, no draft angles — revise the CAD and print it the same week.

Applications

MJF applications: end-use parts, enclosures, ducting & production runs

Where MJF earns its place.

Functional end-use parts Low-volume production Batch production Series production Bridge production Enclosures & housings Ducting & manifolds Snap-fits & living hinges Lattices & complex geometry Grips, seals & gaskets Injection moulding alternative

MJF 3D printing by industry

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Automotive

Ducting, housings, brackets and interior parts in production volumes, dyed black to read like product. See our automotive 3D printing.

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Industrial & automation

Repeatable end-use parts, manifolds and jigs at batch and series volume.

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Consumer products

Enclosures, grips and lattices with a sealed vapour-smoothed finish, straight to end use.

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Medical & wearables

Bio-based PA 11 Gen2 and flexible TPU 01 for durable, body-adjacent parts.

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Robotics

Snap-fit assemblies, living hinges and complex geometry consolidated into single parts.

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Electronics enclosures

Watertight PA 12 housings and connector bodies, dyed for a finished look.

Case study · Automotive

MJF bridge production: 350 sets of HVAC ducting for Jaguar Land Rover

MJF 3D printed HVAC ducting assembly in bio-based PA 11 by RYSE 3D, welded from multiple printed sections, produced as bridge production for Jaguar Land Rover

Automotive 3D printing at RYSE 3D — 350 sets of MJF HVAC ducting in bio-based PA 11, welded into full-length assemblies, run as bridge production for Jaguar Land Rover.

When Jaguar Land Rover needed HVAC ducting while blow-mould tooling was being modified, the programme couldn’t wait for the tools to be signed off. RYSE 3D ran bridge production of 350 sets on MJF, printed in bio-based PA 11 and welded together into the larger duct assemblies, so JLR had production-grade parts in hand while the tooling caught up — with no tooling cost of its own and no pause to the build schedule.

These weren’t display parts. The MJF ducting was crash tested, VOC tested and airbag tested to the same standards as the moulded parts it stood in for — bridge production that passed full automotive validation. It’s exactly what MJF is built for: repeatable, functional end-use parts at production volume, delivered on the programme’s timeline instead of the tooling’s.

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350 sets, bridge production

Volume parts delivered while blow-mould tooling was modified — no gap in the programme.

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Bio-based PA 11

Impact-tough, ductile nylon — the right grade for functional automotive ducting.

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Welded assemblies

Printed sections welded into full-length duct assemblies beyond a single build.

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Crash, VOC & airbag tested

Passed full automotive validation — production-grade, not prototype.

Talk to us about bridge or low-volume production → Get an instant quote

Comparison

MJF vs injection moulding

The prototype worked. Now you need 300 of them, identical, next month — and the tooling quote came back at five figures and eight weeks. MJF fuses whole beds of parts at once, with no supports and no mould, so the 300th part matches the first and the price per part falls as the bed fills. No committing to volume before you’ve sold one, and no paying again for every design revision.

Injection moulding still wins on unit cost at very high volumes on a frozen design. For the run between a prototype and mass production — batch production, low-volume series production and end-use parts by the hundred — MJF is usually faster and cheaper all-in, with no tooling to buy. Not sure which fits? Send the CAD and we’ll point you to MJF, SLS or FDM. No sales call, no obligation.

	MJF 3D printing	Injection moulding
Tooling cost	None	Typically five figures
Time to first part	5–7 working days	Around eight weeks for a mould
Minimum order	None — one part is viable	Volume commitment to justify the tool
Design revisions	Re-upload the CAD, no cost	Tool modification or a new tool
Draft angles & ejection	Not required	Designed in from the start
Unit cost at very high volume	Falls as the bed fills	Lower on a frozen design

✗

The usual way

Five figures and eight weeks for a mould. Commit to volume before you’ve sold one. Redesign around draft angles and ejection. Pay again for every design revision.

✓

With RYSE 3D

No tooling, no minimum order, no commitment. Nest the whole bed — cost per part drops as it fills. Geometry is free: no supports, no draft angles. Revise the CAD and print it the same week.

Comparison

MJF vs SLS 3D printing

Both are powder bed fusion, both need no supports, and both produce functional nylon parts. The difference is how the powder is fused — and what that means for repeatability, material choice and build size.

	MJF	SLS
Fusing method	Jetted fusing agent, whole layer fused at once under infrared heat	CO² laser traces each part on every layer
Materials	PA 12, PA 11 Gen2, TPU 01	Widest range — PA12, PA11, PA12-GF, PA12-CF, TPU 90A
Build envelope	380 × 284 × 380 mm	165 × 165 × 300 mm, or 490 × 490 × 740 mm in PA12-CF
Strongest suit	Repeatable volume production — consistency across a full bed	Material choice — glass-filled and carbon-filled grades
Lead time	5–7 working days	1–3 working days express, 5–7 standard
Supports	None	None

Impact values are not comparable across the two processes: MJF quotes notched impact in kJ/m², SLS quotes notched Izod to ASTM D256-10 in J/m. We run both processes in-house, so send the CAD and we’ll put your part on whichever performs better — compare the full SLS service or browse all materials.

Ordering

How to order MJF parts online

CAD to confirmed order, mostly online. Engineers step in where a part needs them.

Upload & review

Send a STEP or STL. We confirm it fits the bed and how many nest per build — which sets your price per part.

Material & finish

Pick PA 12, PA 11 Gen2 or TPU 01, and a finish — grey, dyed black or vapour smoothed — or tell us the job and we’ll spec it free.

Print & finish

Nested, fused, cooled and de-powdered, then bead blasted, dyed or vapour smoothed as ordered.

Inspect & ship

Dimensional inspection, then the batch ships UK-wide in 5–7 working days.

Get an instant quote →

Trade accounts

Trade accounts & dedicated account management

MJF is a production process, so most customers come back — repeat batches, a growing BOM, an ongoing series. A trade account gives you a named engineer who knows your parts, not a queue.

A dedicated account manager

One named contact who knows your programme, tolerances and deadlines.

Repeat orders, no re-quoting

Part history held on the account — reorder a proven batch without re-specifying.

Volume pricing that scales

Cost per part falls as the bed fills and as your volumes grow, all the way to 100,000 parts.

Engineering support built in

DfAM review, material selection and first-article inspection from the engineers who run the machines.

Open a trade account → Call 024 7736 0144

Technical download

Download the MJF capabilities brochure

Full property tables for PA 12, PA 11 Gen2 and TPU 01, the build envelope and finishing options — the reference our engineers work from.

Request the MJF brochure → Get a printed sample pack instead

Free sample pack

Want to hold an MJF part before you order?

Spec sheets only tell you so much. Our free sample pack puts real printed parts in your hand — the grades, the finishes and the feature resolution — so you can judge the surface and the stiffness for yourself before you commit a production run to it.

Real printed MJF parts Grey, dyed and smoothed side by side Free to UK addresses No sales call

Claim your free sample pack → Call 024 7736 0144

FAQ

MJF 3D printing FAQ

What is MJF 3D printing?

MJF (Multi Jet Fusion) is an HP powder bed fusion process that jets a fusing agent across a bed of nylon powder and fuses whole layers at once, with no supports and no mould. It is built for repeatable, functional end-use parts at production volume, where the price per part falls as the build fills.

What is the largest part you can MJF 3D print?

Our MJF build volume is 380 x 284 x 380 mm, with all three materials nested many at a time. Bigger than that and we split, print, bond and inspect the assembly, or move it to large-format FDM at up to 500 x 500 x 900 mm.

Which MJF materials do you offer?

Three production polymers: PA 12 (the watertight, lowest-cost volume workhorse), PA 11 Gen2 (impact-tough and bio-based) and TPU 01 (a flexible Shore A 88-90 elastomer). Tell us the job and we will spec the grade free with your quote.

Is MJF good for production and end-use parts?

Yes. MJF is our production 3D printing process for repeatable end-use parts by the hundred, with injection-mould economics and no tooling. Cost per part drops as the bed fills, so batch production and low-volume series production are where it earns its place. Instant online pricing runs to 100,000 parts.

How much does MJF 3D printing cost in the UK?

MJF prices by the build, not the part: the more parts nested in a bed, the less each one costs. Upload a STEP or STL to our instant quote tool for GBP pricing on up to 100,000 parts, from a single part to production batches, with no tooling and no minimum order.

What is the difference between MJF and SLS 3D printing?

Both are powder bed fusion processes that fuse nylon powder with no supports. MJF jets a fusing agent and fuses whole layers at once under infrared heat, which makes it fast and highly repeatable across a full bed. SLS traces each part with a laser and offers the wider material range, including glass-filled and carbon-filled nylon. We run both, so your part goes on whichever performs better.

How long does MJF 3D printing take?

Typical MJF turnaround is 5-7 working days: printed, cooled, de-powdered, finished and inspected, not just off the machine. Lead time is confirmed at quote.

Are MJF nylon parts watertight?

MJF PA 12 is the grade to reach for when a part has to hold fluid or air, and it is used for ducting and watertight housings. As-printed powder bed parts are slightly porous, so for anything that has to seal properly we vapour smooth the surface, which closes the texture into a sealed semi-gloss skin. Tell us the pressure and the medium at quote and we will spec it.

What finishing is available for MJF parts?

Bead-blasted grey as standard, through-dyed black (the most popular, and the colour will not chip or flake off an edge the way paint does), and premium vapour smoothing that seals the surface into a semi-gloss skin. All done in-house, with no third party and no extra week in the schedule.

Can MJF handle batch and series production?

Yes. MJF is built for it: batch production and low-volume series production of functional end-use parts, with cost per part falling as the bed fills and part history held on your account for repeat orders. We ran 350 sets of HVAC ducting as bridge production for Jaguar Land Rover on this process.

Is MJF a good alternative to injection moulding?

For the run between a prototype and mass production, usually yes. There is no tooling to buy, no eight-week wait and no minimum order, and a design revision costs nothing but a re-upload. Injection moulding still wins on unit cost at very high volumes on a frozen design. Send the CAD and your annual volume and we will tell you honestly which route costs less.

Do you offer trade accounts for 3D printing?

Yes. Regular buyers get a trade account with a dedicated account manager, part history held on the account so repeat batches do not need re-quoting, and volume pricing that scales as the bed fills and your volumes grow.

Where can I find an MJF 3D printing service near me in the UK?

RYSE 3D is a UK MJF 3D printing service in Shipston-on-Stour, Warwickshire, central for the Midlands, Coventry, Birmingham, Oxford, London and the South East, shipping parts UK-wide. Nothing is offshored and nothing is brokered out. Upload your CAD from anywhere in the UK and we will ship to you.

Where can I download MJF material datasheets?

Our MJF capabilities brochure carries the full property tables for PA 12, PA 11 Gen2 and TPU 01, along with the build envelope and finishing options. Each grade also has its own page with full data.

Ready when you are

Send the CAD. Get a price, not a sales call.

Upload your part for instant MJF pricing on up to 100,000 parts, or send the files and we’ll quote it back. Production volume, injection-mould economics, finished in the UK.

Get an instant quote → Book a meeting

Printed, dyed, smoothed and inspected at our own ISO 9001 facility in Shipston-on-Stour, Warwickshire. Over 2 million parts produced since 2017. Call us on 024 7736 0144.