13 YEARS
Precision CNC Machining Experience
52 Machines
Machinery and
equipment
100000+
Manufactured Parts
100%
CMM Quality Inspection
ISO
9001:2015 Certified 14001:2015 Certified
YUANYI provides Mill Turn Machining services for complex precision parts, helping reduce setup errors, improve dimensional consistency, and shorten production lead times for both prototypes and production runs.
Precision CNC Machining Experience
Machinery and
equipment
Manufactured Parts
CMM Quality Inspection
9001:2015 Certified 14001:2015 Certified
Mill-turn machining is not just about combining turning and milling in a single machine. For many precision components, success depends on how the machining process is planned, how fixtures are designed, and how dimensional stability is maintained throughout production.
At YUANYI, we work closely with customers from the early stage of a project to evaluate part geometry, machining feasibility, tolerance requirements, and production efficiency. Our goal is not simply to manufacture parts, but to help reduce machining risks, improve consistency, and support long-term production reliability.
Every project is reviewed before machining to identify potential risks related to tolerance, tool accessibility, and machining strategy.
Whenever possible, we reduce secondary operations and repeated repositioning to improve dimensional consistency.
From side holes and slots to eccentric features and multi-surface geometries, we help simplify challenging machining projects.
Quality checks are performed during and after machining to ensure critical dimensions remain under control.
| Item | Metric units | Imperial units |
|---|---|---|
| Bar / chucked part size | Ø 3–65 mm (bar) / Ø 3–250 mm (disc) | Ø 0.12–2.56 in (bar) / Ø 0.12–9.84 in (disc) |
| Effective length (with sub-spindle hand-off) | ≤ 500 mm | ≤ 19.7 in |
| Typical tolerance (mill-turned) | ±0.005 mm | ±0.0002 in |
| Roundness / concentricity (typical) | ≤ 0.01 mm | ≤ 0.0004 in |
| Surface finish (as-machined) | Ra 0.4–3.2 μm | Ra 16–126 µin |
| Surface finish (polished) | Ra ≤0.2 μm | Ra ≤8 µin |
*Adjust values to your actual machine envelope and QA capability.
Working with YUANYI means more than ordering machined parts. You get an experienced manufacturing team
that supports your project from technical review to stable production delivery.
Our programming and setup masters have **20 years of hands-on machining experience**, helping avoid costly production mistakes before they happen.
Technical questions are reviewed directly by experienced engineers, reducing delays and improving project efficiency.
When machining challenges arise, our engineering and production teams work together quickly to find practical solutions.
We focus not only on the first part, but also on maintaining stable quality throughout production runs.
Whether you need a prototype, a small batch, or ongoing production, we can support your project requirements.
From machining and finishing to inspection and assembly support, we simplify your supply chain by managing multiple processes under one roof.
Our mill-turn machining service is supported by experienced programming and setup masters, helping customers solve complex accuracy, concentricity, and batch consistency challenges.
Master Xu has 20 years of experience in programming and setting up turning-milling machining centers. He is well-versed in single-setup machining solutions for parts requiring high concentricity and positional accuracy.
He specializes in optimizing machining processes based on product structure, material properties, and precision requirements, with a particular focus on clamping stability, tool selection, toolpath planning, and thermal deformation control.
Precision turned-milled part (15×8 mm, Ra0.4 μm)
TSUGAMI M08DY-II Mill-Turn MachineA customer required a small precision component with side-milled surfaces and a custom internal profile...
A customer required a small precision component featuring side-milled surfaces and a custom internal profile. The main challenge was not achieving the tolerance on a single part, but maintaining concentricity, positional accuracy, and surface consistency throughout batch production.
After reviewing the part design with our engineering and production teams, we selected a TSUGAMI M08DY‑II Mill‑Turn Machine mill-turn machine and completed all turning and milling operations in a single setup. By machining under the same datum reference, we minimized errors caused by secondary clamping and manual repositioning.
To improve stability, the outer diameter was finish-turned first to establish the primary datum before side milling and internal profile machining. During finishing, spindle speeds were maintained between 4,500 and 5,000 rpm with reduced feed rates to achieve a smoother surface finish.
For the internal profile and side features, small-diameter carbide tools were programmed with arc entry and climb milling strategies to reduce cutting vibration and improve dimensional consistency.
Every mill-turn component is inspected throughout production to ensure dimensional accuracy, concentricity, and consistent quality from the first part to the final batch.
Review drawings, tolerances, materials, and critical dimensions before production.
Verify key dimensions, surface finish, and machining results before batch production.
Check dimensional trends during production to control tool wear and size drift.
Inspect finished parts according to drawings and customer requirements.
Provide dimensional reports and quality records when required.
View our full quality control system, testing process, and inspection capability.
6061, 7075, and 5052 are widely used for lightweight precision parts, housings, brackets, and automation components.
304, 316, and 17-4PH are suitable for durable and corrosion-resistant parts with stable machining performance.
Ti-6Al-4V and Grade 2 are often selected for aerospace, medical, and high-strength lightweight components.
C360 and C260 provide excellent machinability for fittings, valves, and precision machined connectors.
C110 and C101 are used for electrical, conductive, and thermal management components.
POM, Nylon, PTFE, PEEK, and ABS are suitable for lightweight, wear-resistant, and insulating parts.
Elevate the durability, precision, and appearance of your mill-turn components. Our specialized surface finishes enhance wear and corrosion resistance, improve dimensional stability, and deliver a professional look—ensuring every component meets both functional and aesthetic requirements.
Mill-turn combines turning and milling in a single setup, allowing complex features like side holes, slots, threads, and multi-face machining in one clamping.
Small to medium shafts, bushings, medical components, aerospace brackets, robotics parts, and any part requiring tight concentricity and positional accuracy.
We typically achieve ±0.005 mm, depending on part geometry and material.
Yes, we can handle from single prototypes to large production runs without compromising accuracy.
Yes, 100% of parts can be inspected with detailed quality reports, including dimensional, concentricity, and surface finish data.
Yes, 100% of parts can be inspected with detailed quality reports, including dimensional, concentricity, and surface finish data.
Aluminum, stainless steel, carbon/alloy steel, brass, copper, titanium, and engineering plastics.
By documenting tooling, process parameters, and one-setup machining strategies, we maintain dimensional consistency across all parts.
Anodizing, black oxide, electropolishing, bead blasting, powder coating, zinc/nickel plating, and passivation.
Is there a minimum order quantity?
No, we support prototypes and low-volume production; there is no MOQ.
Upload your CAD drawing and our engineering team will review it to provide a fast, practical quotation.Get expert guidance on tolerances, materials, and one-setup machining strategies for your precision components.