Custom MIM parts
Gears, lock cores, levers, brackets and other small complex shapes in the 0.1–250 g range, moulded to near-net shape so most parts need little or no machining afterwards.
Custom MIM parts, 0.1–250 g, made in Shenzhen
Small, complex metal parts by metal injection moulding — the shapes that are too intricate to machine economically, produced in volume with tight, repeatable tolerances. Send your drawing and get a quote in 2–3 working days.
0.1 – 250 gPart weight range
From 5,000 pcsMinimum order quantity
≈ 2 weeksMould lead time
2–3 daysDrawing to quotation
Our services
Every part is produced to your drawing — there is no catalogue and no stock parts. Four services cover the full route from tooling to finished part.
Mould making
Tooling is arranged together with production in Shenzhen. Mould lead time is about two weeks, and the tool can be adjusted quickly after first samples.
Stainless steel MIM parts
316L and 17-4PH stainless parts for applications that need corrosion resistance or higher strength — locks, bathroom fittings and hardware.
MIM finishing
Deburring, polishing, and secondary operations such as drilling, tapping and CNC touch-up, so parts arrive ready for your assembly line.
Typical parts we make
The part families we quote most often. Everything is custom-made to your drawing — the photos below show typical MIM shapes, not stock items for sale.
Precision gears & pinions
Spur, helical, bevel and internal ring gears. Tooth profiles come straight out of the mould, so whole gear sets repeat identically, part after part.
- Materials
- Iron-based alloys · 17-4PH
- Typical
- 0.5–120 g per part
- Used in
- Gearboxes, power tools, drives
Drive gears & sprockets
Larger drive wheels, chain sprockets and pinions for tool gearboxes and small machinery — lightening holes and shaped bores moulded in, not machined after.
- Materials
- Iron-based alloys · 17-4PH
- Typical
- 20–250 g per part
- Used in
- Power tools, small machinery
Hub & keyway gears
Gears with the hub, keyway and flats formed in the same moulding — ready to mount on the shaft with no broaching or extra machining.
- Materials
- 17-4PH · iron-based alloys
- Typical
- 5–80 g per part
- Used in
- Motors, pumps, instruments
Lock cores, cams & bolts
The working parts inside locks: cores, cams, bolts and latch pieces, with the slots, steps and grooves moulded in at full strength.
- Materials
- 316L · 304 stainless
- Typical
- 2–60 g per part
- Used in
- Door locks, cabinet locks
Housings, sleeves & fittings
Hollow housings and sleeves with cross-holes, flats and internal profiles formed in one moulding — shapes that would take several machining setups otherwise.
- Materials
- 316L · 17-4PH stainless
- Typical
- 3–100 g per part
- Used in
- Tools, valves, instruments
Faucet & valve internals
Stems, seats, sleeves and cartridge bodies that live inside faucets and valves, in corrosion-resistant grades made for wet environments.
- Materials
- 316L · 304 stainless
- Typical
- 2–80 g per part
- Used in
- Faucets, valves, shower fittings
Watch cases & crowns
Cases, case backs, bezels and knurled crowns with a bright polished finish — small parts where surface quality is the first thing your customer sees.
- Materials
- 316L stainless
- Typical
- 0.5–40 g per part
- Used in
- Watches & precision goods
Brackets, levers & shaped parts
Flat and formed parts — brackets, levers, clips, links and hooks — with holes and cut-outs moulded in rather than drilled and milled afterwards.
- Materials
- 316L · iron-based alloys
- Typical
- 1–100 g per part
- Used in
- Hardware, tools, fittings
Don't see your part? If it is small (0.1–250 g), complex and metal, it is probably a MIM candidate. Send the drawing and we will tell you honestly within 2–3 working days whether MIM makes sense for it.
How MIM works
Metal injection moulding combines plastic injection moulding with powder metallurgy: fine metal powder is moulded like plastic, then sintered into solid metal.
-
1
Mixing
Fine metal powder is mixed with a polymer binder to make a feedstock that flows like plastic.
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2
Injection moulding
The feedstock is injected into a steel mould, forming the “green part” — your shape, slightly oversized to allow for shrinkage.
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3
Debinding
The binder is removed, typically at around 450 °C, leaving a fragile “brown part” of pure metal powder.
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4
Sintering & finishing
High-temperature sintering fuses the powder into dense, solid metal. Parts are then deburred, polished or machined as your drawing requires.
Materials & typical uses
Stainless steels are the most common MIM materials. Tell us the working environment of your part and we will confirm the grade in the quote.
| Material | Chosen for |
|---|---|
| 316L stainless | Corrosion resistance — locks, bathroom fittings and hardware parts |
| 17-4PH stainless | Higher strength and hardness after heat treatment |
| 304 stainless | General-purpose corrosion-resistant parts |
| Iron-based alloys | Gears and structural parts where cost matters most |
| Other alloys | Ask us — material is confirmed per drawing before quoting |
- Locks & hardwareLock cores, cams, gear parts
- Bathroom & sanitaryFaucet and valve internal parts
- ToolsHand & power tool components
- Watches & precision partsTiny gears and small fittings
How ordering works
Three steps from drawing to quotation. No drawing yet? A photo of the part and its rough dimensions is enough to start the conversation.
01
Send your drawing
Use the form below, WhatsApp or email. 2D drawings or 3D files (STEP/STP) both work.
02
Get your quote in 2–3 days
We review manufacturability, confirm the material, and quote the mould fee and unit price for your quantity.
03
Mould, samples, production
Mould making takes about two weeks. You approve samples first; mass production starts only after your sign-off.
Minimum order: 5,000 pieces per part. Quoting is free and there is no obligation — if MIM is not the right process for your part, we will tell you honestly rather than quote anyway.
Request a quote
Fill in what you know — only your contact and a short description are required. The buttons below open WhatsApp or your email app with everything pre-filled; attach your drawing there.
Common questions
What size of part suits MIM?
Our range is 0.1 g to 250 g per part. As a rule, the smaller and more complex the part — and the higher the quantity — the more MIM beats machining on cost.
What is the minimum order quantity?
5,000 pieces per part. Below that, the mould cost is spread over too few parts for MIM to make economic sense.
How much does the mould cost?
It depends on the part's size and complexity, so it is quoted per drawing. You receive the mould fee as a separate line in your quotation — no hidden tooling charges later.
How long does everything take?
Quotation: 2–3 working days after we receive your drawing. Mould making: about 2 weeks, then samples for your approval before mass production.
What file formats can I send?
2D drawings (PDF, DWG) or 3D files such as STEP/STP are ideal. If you only have a physical sample or photos, send those first and we will advise what else is needed.
Can you sign an NDA for my drawing?
Yes — ask before you send the files and we will arrange it. Drawings are only used to evaluate and produce your part.