Welcome to MJ Prototypes — your factory for prototypes, tooling and production.

From First Part to Full Production

From First Part to Full Production

We build your parts the way you need them — on time, on spec, and at any volume.

  • CNC machining services
  • Injection molding services
  • Custom metal and plastic parts
  • Prototypes | Moulds | Production
5-Axis CNC Machining, 3-Day Prototypes

5-Axis CNC Machining, 3-Day Prototypes

Tight tolerances in aluminium, stainless and titanium, machined in our own cells.

  • 3 / 4 / 5-axis milling and mill-turn
  • ±0.02 mm standard tolerance
  • 40+ engineering materials
  • Free quotation inside 24 hours
Tooling and Molding Under One Roof

Tooling and Molding Under One Roof

From mould flow review to T1 samples and serial production runs on our own presses.

  • Aluminium bridge tools and hardened steel moulds
  • 1 to 10,000+ pieces
  • In-house EDM, WEDM and polishing
  • Process data recorded with every tool
Company

Trusted by engineering teams worldwide

Focus on prototype and mould manufacturing, measured by delivery, not slogans.

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Years of Industry Experience

Continuous work in prototype, tooling and low-volume manufacturing.

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Manufacturing Team

Machinists, toolmakers, engineers and QA staff on the floor every day.

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Customer Cases

Programmes delivered for development teams, OEMs and Tier-1 suppliers.

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Projects Delivered

Covering one-off prototypes through to full production campaigns.

Capabilities

In-House Manufacturing Capabilities

CNC machining, mould making, injection moulding, sheet metal, 3D printing, vacuum casting and surface finishing — prototypes and low-volume production, all under one roof.

CNC Machining

CNC Machining

  • Prototype to 1–10,000 pcs
  • 3 / 4 / 5-axis milling + turning

3-, 4- and 5-axis milling plus turning for metal and plastic parts, delivered in as little as 3 days.

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Injection Molding

Injection Molding

  • 1 – 10,000+ pcs per run
  • Prototype, bridge & production tooling

From aluminium bridge tools to hardened production moulds — one shot or ten thousand, on our own presses.

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Mold Making

Mold Making

  • Mold-flow guided design
  • Hardened production tooling

Custom injection, die-cast, stamping and silicone moulds — designed, cut, polished and tried in-house.

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Sheet Metal Fabrication

Sheet Metal Fabrication

  • Fibre laser to 20 mm steel
  • Robotic & press-brake bending

Laser cutting, bending, stamping and welding for enclosures, brackets and chassis from 0.3 mm up.

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3D Printing

3D Printing

  • SLA to 800 mm build
  • SLS nylon PA12 & PA11

SLA, SLS and SLM/SLM additive service for geometry that machining or moulding simply cannot reach.

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Vacuum Casting

Vacuum Casting

  • 25–50 replicas per silicone mould
  • Shore 30A to rigid ABS-like

Silicone moulds and polyurethane replicas — 10 to 50 near-production parts long before steel tooling.

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Surface Finishes

Surface Finishes

  • Type II & Type III anodising
  • In-house spray booth & curing

Anodising, plating, blasting, painting and texture — the finish that makes a machined part a product.

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Parts Gallery

Gallery of Products

A sample of components shipped from our workshops: machined, formed, printed, moulded and finished.

Aluminium — 5-axis CNC
Aluminium — 5-axis CNC
Steel CNC turning
Steel CNC turning
ABS — CNC milling
ABS — CNC milling
Injection moulding part
Injection moulding part
Injection mould, polished cavity
Injection mould, polished cavity
PMMA — optical CNC milling
PMMA — optical CNC milling
Sheet metal bending & enclosures
Sheet metal bending & enclosures
Vacuum casting parts
Vacuum casting parts
Surface finish sample board
Surface finish sample board
SLS 3D printing
SLS 3D printing
Silicone mould tooling
Silicone mould tooling
Assembly & cleanroom packing
Assembly & cleanroom packing
Sectors

Industry Services

Advanced manufacturing for medical devices, automotive, consumer electronics, robotics, aerospace and industrial equipment.

Medical Industry

Medical Industry

Titanium instrument parts, device housings and diagnostic consumables made with full traceability.

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Automotive

Automotive

Functional prototypes, testing fixtures and low-volume parts for powertrain, EV and trim programmes.

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All Industries
MJ Prototypes engineering team in the workshop
17years of industry experience
Why MJ

Why Choose Us

We help you land every project with professional, stable and efficient manufacturing.

01

One-Stop Manufacturing Solution

Prototyping through to mass production — machining, tooling, moulding, finishing, inspection and global shipping handled by one team.

02

Diverse Machining Capabilities

40+ materials, 3 to 5-axis milling, mill-turn, additive and forming processes, so your design is never limited by one machine.

03

Dedicated Customer Service

Clear communication before the order, weekly production updates during it, and follow-up after delivery until you are satisfied.

04

Fast Quote Within 24 Hours

Send drawings or a 3D model and get a priced DFM review the next working day.

Contact our team
Facilities

Our Manufacturing Facilities

Machining, injection moulding, 5-axis work, tool rooms, finishing line and cleanroom packing — quality and speed controlled in one place.

Our CNC workshop

Our CNC workshop

22 machining centres, three-shift operation

Metrology and inspection

Metrology and inspection

CMM, optical comparator, calibrated bench

Cleanroom assembly

Cleanroom assembly

Class 100,000 packing and assembly area

Injection moulding hall

Injection moulding hall

36 t to 320 t presses, robot loading

Mould shop

Mould shop

EDM, WEDM, grinding and hand finishing

Sheet metal line

Sheet metal line

Fibre laser, turret punch, 1100 t brake

Quality

How We Ensure the Quality of Your Parts

Inspection is a process, not a final stamp. Here is how every order is verified.

Dimensional Inspection

Dimensional Inspection

CMM, height gauges, optical comparators and hand metrology cover features from µm bores to large envelopes.

  • Calibrated equipment with traceable certificates
  • 100% visual check on every order
  • Sampling plans available on request (AQL)
Detailed Quality Reports

Detailed Quality Reports

Every shipment is backed by documentation you can drop straight into your own technical file.

  • First Article Inspection to ASME Y14.43
  • Material and ROHS / REACH declarations
  • Full CMM report with actual values, not just pass/fail
Approval Before Shipment

Approval Before Shipment

Nothing leaves the factory until you have seen it. We photograph the packed parts and wait for your go-ahead.

  • Photos of parts, labels and carton count
  • Consolidated or split shipments supported
  • Serialised batch records kept for five years
Process

Our Ordering Process

One-to-one follow-up with a quick response at every single step.

Submit Inquiry

Send drawings or a 3D model (STEP / IGES / SLDPRT) with your target quantity and finish.

DFM Review

Our engineers return a manufacturability report with cost and risk notes within 24 hours.

Payment

Confirm the quote and pay securely. Tooling and production start immediately.

In Production

Weekly progress reports with photos so you always know where the build stands.

Inspection

Dimensions are verified against your drawing and an FAI report is issued before dispatch.

Delivery & Support

Parts ship with your chosen Incoterms; any follow-up revision is handled fast.

Feedback

What Our Customers Say

Direct feedback from the engineering and procurement teams we serve.

★★★★★

Design freeze in six weeks

Five axis brackets and anodised housings arrived a week early with a full CMM report, which let us start system test on schedule.

Hardware Lead, robotics start-upShenzhen · 2025
★★★★★

A mould that actually matched the sample

The T1 parts needed two adjustments and both were done inside a week. Production ran 40k shots without a single cavity repair.

Programme Manager, consumer devicesShenzhen · 2025
★★★★★

Traceability without the paperwork fight

Every titanium part came with its lot number mapped to the drawing revision. Our auditor accepted the file in one pass.

Regulatory Affairs, diagnostics OEMSuzhou · 2024
★★★★★

Small volumes treated seriously

Nobody else wanted a 120-piece run. They tooled it in aluminium, delivered in three weeks and kept the fixture for the follow-up.

Operations Director, industrial sensorsDongguan · 2025
Partners

Brands We Work With

MedTech OEM · DETier-1 Automotive · JPRobotics Scale-up · USAppliance Major · EUDrone Manufacturer · CNAudio Brand · UKSensor Specialist · ILDevice Start-up · SGIndustrial Group · CHAvionics Supplier · FRMedTech OEM · DETier-1 Automotive · JPRobotics Scale-up · USAppliance Major · EUDrone Manufacturer · CNAudio Brand · UKSensor Specialist · ILDevice Start-up · SGIndustrial Group · CHAvionics Supplier · FR

Put your parts into production today

Send us your drawings and we will get back to you as soon as possible — quotes inside 24 hours.

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