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Shenzhen, China · Since 2009 · ISO 9001:2015

Your parts, made on our own machines in Shenzhen.

Send a drawing and you get a price, a lead time and the name of the engineer who will run your job — a preliminary assessment usually inside the hour. Both plants are ours, in Bao'an District, so there is no broker between your file and the machine that cuts it.

  • 1 hour to a first assessment
  • ±0.005 mm tightest tolerance
  • 2 owned factories
  • SGS ISO 9001:2015

🔒 All uploads are secure and confidential.

Exterior of the Proleantech factory building in Baoan District, Shenzhen, with the company sign on the facade
Our factory in Bao'an District, Shenzhen — the address that will be on your shipping documents.

By the numbers

What you get, and where each number comes from

1 hourPreliminary assessment, from your file to our first replyA · /get-a-quote/
±0.005 mmTightest tolerance, on a specified featureA · /standards/
1 dayFastest turnround on parts we can run straight offA · /cnc-machining/
50+Material options on the quote sheetA · /cnc-machining/
2Owned factories, Bao’an District, ShenzhenA · this page
40+Countries your parts ship toA · this page

Six figures, and every one of them either published on this site or written into a document we can send you. If one of them decides your order, ask us for the source before you commit — we would rather show it than have you take it on trust.

Aisle of CNC machining centres inside the Proleantech workshop in Baoan District, Shenzhen

The factory

You can watch your parts being made.

Your order runs on the machines in this aisle, in plants we own and staff — not in a broker's inbox. Tell us a date and we will walk you through the machine shop, the metrology room and the dispatch area, so that the factory on your shipping documents is a place you have actually stood in.

  • MachiningBao'an District, Shenzhen, China
  • Export documentsMongkok, Kowloon, Hong Kong, China
  • InspectionBefore your parts ship
The Proleantech team of about twenty-five people, in workwear, standing in a row between the machining centres in the Shenzhen workshop
The people your order passes through — machining, inspection and packing, photographed on our own shop floor in Bao’an District.

Inside the shop

The equipment your order will run on

Nothing here is stock photography or a render — these are our machines, our metrology room, our benches and our people, photographed in Bao'an. Send us the drawing and we will tell you which of them your part will run on, and what that means for your tolerance and your delivery date.

People gathered at the control panel of a CNC machining centre on the shop floor
A group at the control panel of one of the machining centres, mid-shift.
A Taikan T-500S vertical machining centre with the model nameplate clearly visible
A Taikan T-500S vertical machining centre. The nameplate is readable, so you can look the model up.
The DK7735 wire electrical discharge machine, with its nameplate visible
The DK7735 wire EDM — where hardened stock and sharp internal corners get cut, with no cutting force on the part.
A handheld alloy analyser being pointed at a metal part to verify its grade
A handheld alloy analyser, used to check that the bar stock is the grade the drawing calls for.
A machined aluminium heat sink with pin fins, next to a small brass machined fitting
Parts off the floor: an aluminium heat sink and a brass fitting, straight from the shop.
Rows of small machined parts laid out on a green inspection mat for counting
A batch of small parts, laid out and counted on the bench before packing.
An operator in a Proleantech work shirt sorting machined parts into blue bins at a bench
At the assembly bench — every part gets a visual check and a count before it is boxed.

Seven photographs from our own shop floor in Bao'an District. Every part shown was made by us. Ask us about any of them and we will tell you where it was taken.

Before you order

The four questions buyers ask before the first PO

These are the four things that actually stop a purchase order — not price, usually. Each answer below links to the evidence, so you can judge it yourself instead of taking our word for it.

01IDENTITY

Is there a real factory behind this, or a broker?

Both plants are ours, in Bao’an District, Shenzhen — the address on your shipping documents is the address where your parts get cut. Come and stand in the workshop before you commit to anything, or ask us for a dated walkthrough of the bay your order will run in.

02CONFIDENTIALITY

Who sees my drawings?

Only the people who quote and machine your job. Ask for an NDA before you send anything and we will sign it first. Our published terms state that drawings are used to quote and to manufacture and are not shared with third parties — you do not have to take that on trust either.

03QUALITY

What happens if a part comes out of spec?

You get numbers rather than a promise. First-article inspection runs before the batch starts, dimensions are checked against your drawing, and the report travels with the shipment. Anything outside tolerance is re-made — which is the whole reason for measuring before the run instead of after it.

04ACCESS

Will I ever reach someone who reads drawings?

Yes — the engineer who prices your job is the one who sets it up, so what you hear at quotation is what happens on the floor. Send a STEP file with a question and it goes to that person, in English or Chinese, in your time zone or ours. If we need something before we can price it, you get the question instead of silence.

Certifications & inspection

The paperwork, and the room it comes from

You should not have to take a supplier's word for quality. Here is the certificate as a document you can check, the room where your parts get measured, and the list of what can travel to you with the shipment.

SGS certificate of registration for ISO 9001:2015 issued to Prolean MFG (Shenzhen) Co Ltd, certificate CN24/00004900

ISO 9001:2015 — certified by SGS

Our quality management system is audited and certified by SGS, not self-declared. The certificate is a PDF on this site: download it, read the scope, and check the ID with SGS directly.

Certificate ID  CN24/00004900

What the scope actually covers

  • CNC machining of metal and plastic parts, from prototype to batch
  • Sheet metal fabrication — laser cutting, bending, stamping and punching
  • Inspection, packing and dispatch of finished parts

Independent verification: search the certificate ID on sgs.com, or ask us for the issuing office's contact details.

Metrology room with a coordinate measuring machine, measuring software on a monitor and a temperature and humidity display on the wall

The room your parts get measured in

A CMM, a granite plate and height gauges — in a room whose temperature and humidity are on the display you can see in the photograph. First-article inspection runs before a batch starts, not after it, and the dimensional report ships with the parts.

Hexagon PC-DMIS CMM operator certificate issued to a Proleantech inspection engineer

Measured by a certified operator

The engineer who runs the CMM is certified on the metrology software by Hexagon. That certificate is a document we can send you alongside the dimensional report — so you know the numbers were produced by someone qualified to produce them.

What can travel with your parts

  • First-article inspection report on new or changed parts
  • Dimensional report against the drawing's tolerances
  • Material certificate, traceable to the mill, on request
  • Finish and treatment records for plated or coated parts

Equipment

Ten process groups, one quotation

Your part decides which of these it runs on. Machining, turning, EDM and sheet metal are quoted under one roof, so you are not the one stitching three suppliers together. Send the drawing with the tolerance and the finish that actually matter, and we will tell you which process holds them — and where that process stops.

Equipment groups: 10 of 10 shown

EquipmentWhere it is documented
CNC machining centres3-axis to 5-axis milling, pallet-fed for repeat workCNC Machining Service
CNC lathesTurning with live tooling for milled features in one setupCNC Turning Service
Turning-millingTurn-mill for parts that would otherwise need two fixturesCNC Turning Milling Service
Swiss-type lathesSmall-diameter, high-volume parts with tight concentricitySwiss Turning Service
Wire EDMHardened tool steel, sharp internal corners, no cutting forceWire cut
Sinker EDMBlind cavities and deep ribs that cannot be milledEDM machining service
Laser cuttingFlat sheet, fast turnaround, from prototype to production batchLaser Cutting Service
CNC press brakeFormed sheet with repeatable bend angles, tooling controlled in-houseSheet Metal Bending Services
Stamping & punchingProgressive dies for volume sheet metal partsStamping Service
Surface grindingFlatness and parallel faces after heat treatmentGrinding Machining Service

This table lists capability groups, not specifications. Cutting envelope, achievable tolerance and batch size depend on the feature, the material and the fixture — they are confirmed at drawing review on the linked page, or in writing with your quote, before you commit to anything.

Customers

The kinds of parts you would be buying

If your part looks like one of these, we have almost certainly made something close to it before. Our production feeds four sectors, and most of the work is repeat orders from customers we have been shipping to for years — which is the least interesting thing you can say about a supplier, and the most useful.

SouthcoRockwell AutomationBMWXCMGZoomlionBosch Rexroth
40+
Countries your parts ship to
1,000+
Enterprises supplied
20+
Industries served
  • Automated manufacturingFixtures, end-effectors and machine frames
  • 3C electronics & roboticsEnclosures, heat sinks and precision internals
  • Automotive & aerospaceStructural and powertrain components
  • Medical devicesHousings and instrument parts, documented material traceability

Locations

Where your parts are made, and where your paperwork comes from

Reception of the Proleantech manufacturing facility, with the company mark on the wall

Manufacturing

Shenzhen factory

Room 101, Building B, No. 15 Lingxia Road
Bao'an District, Shenzhen 518103
China
OriginOwned, not subcontracted
Opened2009

Commercial & documents

Hong Kong, China office

Unit 2, 22/F, Richmond Commercial Building
109 Argyle Street, Mongkok, Kowloon
Hong Kong, China
  • Where the contract is signed and the invoice is raised
  • Where export shipping documents are issued
  • No manufacturing happens at this address — every part is made in Shenzhen, and a buyer can inspect it there
HandlesContracts, invoicing, shipping docs
Time zoneUTC+8
Proleantech engineering office with CAD workstations, where quotations are prepared

Quotes are prepared here and answered within one working day. Send a drawing and you get either a price or the specific question that is blocking it — not silence, and not a call centre.

Questions

What buyers ask us next

What do you need from me to get a quote?
2D or 3D files (STEP, IGES, DWG, PDF), the quantity, the material, and any surface finish or inspection requirement. If you are missing something, send what you have — we will ask for the rest in the same reply rather than sitting on the enquiry.
Where exactly are you located?
Both factories are in Bao’an District, Shenzhen, China — Room 101, Building B, No. 15 Lingxia Road, 518103. Commercial and document work runs through our Hong Kong, China office at Unit 2, 22/F, Richmond Commercial Building, 109 Argyle Street, Mongkok, Kowloon.
What certifications can you show?
ISO 9001:2015, certified by SGS under certificate ID CN24/00004900. The certificate PDF is linked on this page — it is a real document you can download and check with SGS, not a badge image. ISO 13485 and IATF 16949:2016 are held for the relevant programmes; ask us which one applies to your part.
How tight can you hold?
±0.005 mm (±0.0002 in) on a specified feature is our tightest, subject to engineering review, with as-machined surfaces at Ra 125 or better. Minimum feature size is 0.5 mm, and minimum wall is 0.8 mm in metals and 1.5 mm in plastics. The achievable limit is not one number for every feature, so send the drawing and we will say yes or no on the features that matter before you order.
Do you sign an NDA?
Yes. Ask for one before you send drawings and we will sign it first. If you would rather not ask, our terms already state that drawings are used only to quote and manufacture, and are not shared with third parties.
How fast will I hear back?
A preliminary assessment within one hour of your file arriving, and a firm quote usually well inside one working day. If a drawing raises a question we cannot price around, you get the question — not silence.
Can I visit before committing?
Yes, and we would rather you did. Message us with a date and we will arrange access to the workshop, the metrology room and the dispatch area. It is a normal enough request that we keep a standard route through the shop for visitors.

Still designing?

Take something useful away instead

If the drawing is still moving, none of the above decides anything yet. These are the pages engineers actually use while they are choosing a process, a material or a tolerance — read them now, and come back when the drawing is ready.

Start a job

Send us the drawing

You will get a price, a lead time and the name of the engineer who will run your job — or the specific question that is blocking the quote.

🔒 All uploads are secure and confidential. NDAs signed on request.

  • First read inside the hourAn engineer opens your file and tells you what is priceable — and what is not.
  • Firm quote inside one working dayPrice, lead time and the name of the engineer who will run the job.
  • NDA before you send anythingAsk first and we sign it. Drawings are never shared with third parties.