
Precision CNC Milling & Turning Services: Your Trusted Custom Metal Parts Manufacturer
Date:2026-05-27Article editor:Starting Point PrecisionViews:13Choosing the right custom metal parts manufacturer directly impacts your product’s performance, lead time, and cost. When you need precision CNC milling & turning services with tolerances down to ±0.002mm, advanced 5‑axis machining, and a single‑source supplier for complex geometries – the answer lies in a shop that combines engineering depth with modern equipment.
Precision is not an abstract number; it is the difference between a component that fails under vibration and one that performs reliably for years. As a custom metal parts manufacturer specializing in CNC milling and turning, we achieve ±0.002mm on critical features by using:
◆ High‑end 5‑axis CNC mills for complex undercuts and freeform surfaces
◆ Swiss‑type turning centers with live tooling for shafts and bushings
◆ CMM and optical inspection to verify every critical dimension
We serve industries where failure is not an option: aerospace, medical devices, automotive, and electronics.
Start Precision – Your CNC Partner (Visit our homepage to see our full equipment list.)
Many engineers ask: Why use both milling and turning? The answer lies in part geometry. A custom metal parts manufacturer that offers both processes in‑house eliminates the risk of mismatched tolerances and double shipping.
| Feature | CNC Milling (3/4/5‑axis) | CNC Turning (with live tooling) |
|---|---|---|
| Typical shapes | Box‑like, curved surfaces, deep slots | Cylindrical, conical, threaded |
| Tolerance example | ±0.005 mm on pocket depth | ±0.002 mm on shaft diameter |
| Best for | Housings, manifolds, brackets | Valve stems, pins, rollers, adapters |
When we combine turning with live milling, a single machine can produce a finished part from bar stock – flats, cross‑holes, and slots included. This is standard for our precision CNC milling & turning services.
Based on our experience as a custom metal parts manufacturer, we machine a wide range of alloys and plastics:
◆ Stainless steel: 303, 304, 316, 17‑4 PH
◆ Aluminum: 6061, 7075, 5083
◆ High‑temperature alloys: Inconel 718, Monel, Titanium Grade 5
◆ Copper & brass: C110, C360
◆ Engineering plastics: PEEK, Delrin, Ultem
We also offer surface grinding, cylindrical grinding, wire EDM, and EDM sinking – all under one roof.
Every order follows a documented workflow:
1. First Article Inspection (FAI) – Complete dimensional report.
2. In‑process sampling – Every 50 pcs for production runs.
3. Final CMM inspection – Automated report with graphical deviation.
The image below shows a typical 5‑axis milled automotive component after inspection:
5‑axis machined part for CMM instrument
We follow international quality standards. For certification details, refer to ISO 9001:2015 guidelines.
1. Upload your 3D CAD (STEP, IGES, SolidWorks) or 2D drawing.
2. Specify material, quantity, and surface finish.
3. Receive a quote and DFM (Design for Manufacturing) feedback within 24 hours.
Start your project today by contacting our engineering team via Start Precision Contact Page.
We ship worldwide from our facility in Chang’an Town, Dongguan, China – a global hub for precision manufacturing. Typical lead time for low‑volume orders (1–100 pcs) is 7–9 business days.
◆ Technical depth: Engineers recruited from manufacturing plants, not just sales staff.
◆ No MOQ: One prototype or 10,000 production parts – same quality.
◆ Full traceability: Material certifications and inspection reports included.
For high‑volume runs (500+ pieces), ask about our lights‑out machining cells that reduce per‑part cost by up to 30%.
Q1: What is the smallest tolerance you can hold on a turned part?
We regularly hold ±0.002 mm on diameters under 10 mm. For larger diameters, ±0.005 mm is standard. All tolerances are verified with a CMM.
Q2: Do you provide both CNC milling and CNC turning under one order?
Yes. As a custom metal parts manufacturer with both processes in‑house, we combine milling and turning in a single purchase order – saving you logistics and inspection hassles.
Q3: Can you machine parts with complex 5‑axis contours?
Absolutely. Our 5‑axis CNC mills handle undercuts, impellers, and freeform surfaces without multiple setups. Send your STEP file for a free feasibility review.
Q4: What surface finishes are available for custom metal parts?
As‑machined (Ra 1.6 μm), bead blasted, anodized (clear or black), electropolished, passivated, and powder coating. For medical parts, we offer electropolishing to Ra 0.2 μm.
Q5: How do I get a quote if I only have a hand sketch?
We accept clear sketches with critical dimensions. Our engineers will create a CAD model and provide a quote with DFM suggestions – no extra charge for prototypes under 5 pieces.
Q6: What is your typical lead time for international delivery?
For low volumes (1–100 pcs), machining takes 5–7 days plus 3–5 days for air shipping (FedEx/DHL) to most global destinations. Expedited services are available.






Copyright © 2019 All Rights Reserved Dongguan Start Precision Technology Co., Ltd. Tel: +86-769-82855591
Add: No. 277 Zhen'an Middle Road, Chang'an Town, Dongguan, Guangdong, China