CNC Machined Parts, Made to Your Drawings
CNC machined parts made to your drawings — housings, brackets, shafts, flanges, manifolds — from 1 pc to production, direct from our China factory.
From Your Files to Finished Parts
Custom machined parts from IsoCNC start with your definition, not our catalog. You send a STEP model and a 2D drawing; our engineers review manufacturability, quote the job with lead time, and machine the parts on our own equipment. The CNC machining parts we ship — CNC milled parts like housings and manifolds, CNC turned parts like shafts and fittings, precision machined components to tight tolerances — are made to your drawing and verified against it. There are no standard-part libraries and no geometry compromises — if it’s on the drawing and machinable, that’s what ships. We work as a direct factory for OEMs in North America and Europe, covering the full chain from first prototype to repeat production.
Part Types We Produce
Most machined parts fall into a handful of families. Here’s what each demands and how we make them:
- Housings and enclosures — pocketed boxes with threaded holes, O-ring grooves, connector cutouts, and cosmetic finishes. Flatness on sealing faces and clean internal corners drive the work; typically milled from 6061 or 7075 aluminum.
- Brackets and structural parts — weight-reduction pocketing, drilled and reamed fastener patterns, and features on multiple faces. Complex brackets route to 5-axis machining to cut setups and improve feature-to-feature accuracy.
- Shafts and turned components — precision diameters, keyways, grooves, snap-ring features, and cross-holes, finished in one setup on live-tooling lathes. See CNC turning.
- Flanges and fittings — bolt circles, faced sealing surfaces, and gauged NPT, BSP, and metric threads, in stainless, brass, or aluminum.
- Manifolds and fluid components — deep intersecting drilled passages, ported threads, and pressure-tight sealing faces, with burr control as the critical quality issue.
- Plates, fixtures, and tooling — base plates, jigs, and test fixtures held flat and square, usually from MIC-6 or ground stock.
Prismatic parts run on our milling centers — see CNC milling services. If your part doesn’t fit a family above, send it anyway; unusual geometry is the norm, not the exception.
Materials
We machine the standard engineering palette — aluminum (6061, 7075, 5052, MIC-6), stainless steels (303, 304, 316L, 17-4 PH), carbon and alloy steels (1018, 1045, 4140), titanium (Grade 2, Grade 5), brass, copper, and engineering plastics (Delrin, PEEK, nylon, polycarbonate, ABS, PTFE). Material certificates are available on request. Grade-by-grade machinability and selection notes are on the materials page.
Quantities: Prototype to Production
There is no minimum order. The workflow is identical at every quantity — DFM review, programming, machining, inspection, export packing — but the economics differ:
| Quantity | Typical use | What to expect |
|---|---|---|
| 1–10 pcs | Prototypes, fit checks, engineering validation | Fastest turnaround; setup cost carried by few parts |
| 25–500 pcs | Pilot runs, low-volume products, spares | Unit price drops sharply as setup amortizes |
| 500+ pcs | Production runs, blanket orders | Repeatable programs and fixtures; re-orders price lower and ship faster |
For repeat orders we keep your programs, setup sheets, and inspection plans on file, so the second order skips the first order’s overhead. Detail on scheduling is in lead time and MOQ.
Quality and Documentation
Every order is inspected against your drawing before packing — calipers, micrometers, bore and thread gauges for general features, CMM verification for tight tolerances and GD&T callouts. First article inspection reports are standard on new parts; full dimensional reports and material certificates are available on request. Our methods are described in quality inspection, and the tolerances we hold as routine practice are listed under tolerances.
How Ordering Works
- Send files — STEP model plus a drawing (PDF) with tolerances, threads, material, and finish. NDAs welcomed.
- DFM review and quote — an engineer checks manufacturability and returns pricing, lead time, and any cost-saving suggestions, typically within 1–2 business days.
- Approval and production — on your approval, the job is programmed, machined, and inspected.
- Finishing and shipping — anodizing, plating, passivation, or coating if specified, then export packing and air or sea freight with tracking.
Finishes and Post-Processing
Machined parts rarely ship straight off the machine. We coordinate the common finishes as part of the order — Type II and hardcoat Type III anodizing for aluminum, passivation and electropolishing for stainless, nickel and zinc plating, black oxide, powder coating, bead blasting, and laser marking for part identification. Finishes are applied to your drawing callout, and where a coating adds measurable thickness, we machine the pre-finish dimension so the coated part lands in tolerance. Options and typical thicknesses are covered under surface finishes.
What to Look For in a Machined Parts Supplier
Whether you quote us or not, these five checks separate capable suppliers from risky ones:
- 1. Do they own the machines? A factory controls its schedule and quality; a broker adds a layer you can't see. Ask what's made in-house versus subcontracted.
- 2. Do they do real DFM? A supplier who quotes every drawing without comment will discover its problems at your expense. Feedback at RFQ stage is a quality signal.
- 3. Can they show inspection capability? Tolerances are only as good as the measurement behind them. Ask what they inspect with and what reports they provide.
- 4. Do they ask about your application? Shops that ask what the part does make better tolerance and material judgments than shops that only read dimensions.
- 5. Is communication direct? You should reach an engineer who knows your job, not a ticket queue.
Why Buyers Source Machined Parts from China
The honest answer is cost structure, not corner-cutting: machine time, material handling, and overhead price lower, so the same drawing quotes lower — especially at prototype and mid volumes where setup dominates. The risk management is on the buyer: clear drawings, agreed inspection plans, and a factory that documents its work. Read how we structure it in China CNC machining, or see the full process list under CNC machining services.
Send Your Drawings
Upload your STEP files and drawings for a quote with lead time and DFM feedback, typically within 1–2 business days. One part or a production run — the same team reviews both.
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