OSM provides CNC turning services in Vietnam for custom shafts, pins, bushings, sleeves, threaded parts and other rotational components made from metals and engineering plastics. We support prototypes, low-volume orders and production runs with dimensional inspection and project-specific quality documentation.
An NDA Can Be Signed If Needed Before The RFQ.
OSM provides precision CNC turning services for rotational parts, delivering high accuracy, consistent quality, and fast lead times.
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Improve machining efficiency and part accuracy with CNC mill-turn machining, especially for parts that require machining from multiple directions in a single setup.
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OSM supports global customers with custom turned components ranging from simple spacers and threaded fittings to precision shafts, bushings, sleeves and connectors. Our team reviews material, critical dimensions, surface requirements and production volume before machining to establish a practical and repeatable manufacturing process.
With experience gained from thousands of manufacturing projects, our team understands the machining requirements, quality expectations, and critical dimensional requirements of different applications. This helps customers move from prototyping to mass production with greater confidence and consistency.
✔ Vacuum Systems
✔ Commercial
✔ Consumer Products
✔ Energy
✔ Agricultural Machinery
✔ Recreational Equipment
✔ Medical
✔ Communication
✔ Food & Beverage
OSM machines a wide range of metals and engineering plastics for custom CNC-turned parts. Material selection depends on strength, corrosion resistance, temperature, wear, dimensional stability and the operating environment of the final component. Explore our complete CNC machining materials guide for available alloys, plastics and material selection support.
Aluminum is lightweight yet strong, with excellent machinability and corrosion resistance. Ideal for aerospace and automotive parts.
Alloys
| ✔ Aluminum 6061 | ✔ Aluminum 6063 |
| ✔ Aluminum 5052 | ✔ Aluminum 6082 |
| ✔ Aluminum 5083 | ✔ Aluminum 7075 |
Copper is known for its superior electrical conductivity and thermal properties, making it perfect for electrical components and heat exchangers.
Alloys
| ✔ C1100 | |
Brass is durable and has a low friction coefficient, which makes it suitable for fittings, tools, and musical instruments that require precision.
Alloys
| ✔ C3604 | |
Steel is an alloy with high tensile strength and durability, commonly used in construction and automotive industries for its robustness.
Alloys
| ✔ SS400 (A36) | ✔ S45C (1045) |
| ✔ SCM420 (8620) | ✔ S50C (1050) |
| ✔ SCM440 (4140) | ✔ SKD11 (D2) |
Stainless steel is renowned for its corrosion resistance, making it a prime choice for medical devices and food processing equipment.
Alloys
| ✔ SUS201 | ✔ SUS303 |
| ✔ SUS304 | ✔ SUS304L |
| ✔ SUS316 | ✔ SUS316L |
POM is strong, with a low friction surface and good dimensional stability, perfect for precision parts in mechanical applications.
| ✔ POM Black | ✔ POM White |
Nylon is versatile, strong, and wears well against friction, commonly used for gears, bearings, and other wear-resistant surfaces.
| ✔ PA (Nylon) Blue | ✔ PA6 (Nylon) Black |
PEEK offers high-temperature resistance, chemical resistance and good dimensional stability for demanding engineering applications.
| ✔ PEEK Beige (Natural) | ✔ PEEK Black |
PEEK offers high-temperature resistance, chemical resistance and good dimensional stability for demanding engineering applications.
| ✔ PTFE (Teflon) White | ✔ PTFE (Teflon) Black |
Bakelite is heat resistant and electrically non-conductive, perfect for electrical insulators and radio and telephone casings.
| ✔ Bakelite Orange | |
PMMA, or acrylic, is known for its crystal clarity and weather resistance, making it ideal for outdoor fixtures and display cases.
| ✔ PMMA (Acrylic) Transparent | |
Surface finishing can improve the appearance, corrosion resistance, wear performance and surface condition of CNC-turned parts. Available options depend on the base material, dimensional tolerances and functional requirements of each project. View our surface finishing services for detailed process options and material compatibility.
Polishing achieves a high gloss finish, reducing surface roughness and enhancing the aesthetic appeal of metals.
Roughness
| ✔ Ra0.4 | |
| ✔ Ra0.2 | |
As machined finish leaves the surface straight from the CNC machine, providing a cost-effective option with tool marks.
Roughness
| ✔ Ra0.8 | |
| ✔ Ra1.6 | |
| ✔ Ra3.2 |
Anodizing increases corrosion resistance and wear properties, while allowing for color dyeing, ideal for aluminum parts.
Colors
| ✔ Black | ✔ White |
| ✔ Red | ✔ Yellow |
| ✔ Blue | ✔ Clear |
Alodine coating provides corrosion protection and improves paint adhesion, mainly used on aluminum surfaces.
Electropolishing is a chemical process that smooths and brightens surfaces while improving corrosion resistance.
Electroplating bonds a thin metal layer onto parts, improving wear resistance, corrosion resistance, and surface conductivity.
Types of plating coatings
| ✔ Zinc | ✔ Hard Chrome Plating |
| ✔ Nickel Plating | ✔ Decorative Chrome Plating |
| ✔ Electroless Nickel Plating |
Powder coating applies a thick, wear-resistant layer with excellent color and texture options, suitable for a variety of surfaces.
Colors
| ✔ White | ✔ Black |
| ✔ RAL | ✔ Pantone |
Black oxide is a conversion coating for ferrous metals that improves corrosion resistance and minimizes light reflection.
Heat Treatment alters the mechanical properties of metal to increase its hardness, strength, or ductility.
Types of processing
| ✔ Quenched and Tempered | ✔ Vacuum Hardening |
| ✔ Carburizing | ✔ Nitriding |
| ✔ Induction Hardening | ✔ Normalizing |
Sandblasting uses pressurized sand or other media to clean and texture the surface, creating a uniform, matte finish.
Grit/Grain
| ✔ #80-100 | |
| ✔ #100-170 | |
Grinding removes a controlled amount of material with an abrasive wheel to improve dimensional accuracy, roundness and surface finish on suitable turned features.
Roughness
| ✔ Ra0.4 | |
| ✔ Ra0.2 | |
Tumbling smooths and polishes small parts by friction and abrasion in a barrel, offering a consistent but slightly textured finish.
Grit/Grain
| ✔ Globular | ✔ Triangular |
| ✔ Cylindrical | ✔ Polygonal |
OSM machines precision CNC-turned parts to meet demanding dimensional tolerance requirements. Depending on your design, our CNC turning machines can achieve tolerances as tight as ±0.01 mm. Our standard tolerances are ISO 2768-m for machined metals and ISO 2768-c for plastics.
| Description | |
|---|---|
| Maximum part size | Typically up to 200 mm in diameter and 500 mm in length, depending on the material and machine configuration. |
| Minimum part size | As small as 1 mm in diameter, depending on the part geometry and material. |
| General tolerance | Standard tolerances are ±0.01 mm; tighter tolerances down to ±0.005 mm can be achieved depending on the material and part complexity. |
| Lead time | Standard lead times range from 3–7 days for small production batches. Expedited delivery is available, reducing lead times to 24–48 hours depending on part complexity and material availability. |
A well-designed part helps minimize machining risks, control costs, and improve the consistency of CNC-machined parts. Use the following guidelines when preparing drawings or CAD files for custom CNC machining.
| Recommended dimensions | |
|---|---|
| Radius | A minimum internal radius of 0.5 mm is recommended. Larger radii (up to 3 mm or more) can improve tool access and reduce stress concentration in the part. |
| Threads and threaded holes | Both external and internal threads can be precisely machined. Standard thread sizes from M1.6 and above are feasible. Ensure a minimum thread length of 1.5 times the diameter for improved stability. |
| Minimum wall thickness | Maintain a minimum wall thickness of 0.8 mm for metals and 1.5 mm for plastics to ensure structural strength without affecting the machining process. |
| Text | For clear and readable results after machining, engraved text should have a minimum height of 2 mm and a depth of at least 0.5 mm. |
| Holes | The minimum hole diameter is 0.5 mm. For deep holes, maintain a diameter-to-depth ratio of 1:10 to prevent tool deflection and ensure hole quality. |
| Grooves and slots | Avoid excessively narrow grooves whenever possible. Wider grooves improve tool access and machining stability. |
Critical dimensions, tolerances, threads and surface requirements are verified throughout production and before delivery.
Dimensional Inspection
Outside and inside diameters, lengths, shoulders, holes and grooves.
Geometric Accuracy
Runout, concentricity, perpendicularity and critical relationships.
Threads & Surface
Thread fit, pitch, visual condition and specified surface finish.
Quality Documentation
Inspection records and certificates available according to project requirements.
CNC turning uses computer-controlled lathes to rotate the workpiece while cutting tools remove material, producing round, cylindrical, or threaded parts. This process is commonly used to manufacture shafts, pins, bushings, sleeves, washers, and other precision components that require consistent dimensions and repeatable quality.
Right To The Drawing – Right To The Tolerance – Right To The Quality.
Strict Quality Control At Every Stage Of Production.
Providing Technical Guidance And Optimizing Solutions Together With Our Customers.
Committed To On-Time Delivery, Supporting Every Production Schedule.
CNC turning produces cylindrical parts that are symmetrical around their axis. This process is commonly used to manufacture shafts, pins, rods, bushings, and pulleys. It is also well suited for creating external threads, internal holes, and complex contours on cylindrical surfaces.
With high machining precision, CNC turning can achieve tight tolerances and smooth surface finishes, making it suitable for components that require precise fits and controlled movement.
Common applications include the automotive, aerospace, and industrial machinery industries, where part accuracy and consistency are essential.
Yes, CNC turning is versatile enough to handle a wide range of materials, including engineering plastics. Common plastics machined on CNC lathes include POM, Polycarbonate, PTFE (Teflon), Nylon, and Acetal.
Each material has its own characteristics. For example, Nylon is known for its strength and low-friction properties, while Acetal offers excellent machinability and high dimensional stability.
CNC turning of plastic parts requires precise control of cutting speeds and proper tool selection to prevent melting or deformation. This helps ensure high-precision, consistent-quality parts suitable for a wide range of applications.
CNC milling and CNC turning are both subtractive machining processes, but they differ in how the workpiece and cutting tool move during machining.
In CNC milling, the workpiece is typically held stationary while rotating cutting tools move along one or more axes to remove material and create the desired shape. This process is ideal for complex parts with features such as slots, holes, pockets, and contours.
In contrast, CNC turning rotates the workpiece around its axis while a cutting tool removes material. This process is best suited for producing cylindrical or rotationally symmetrical parts, such as shafts, rings, pins, and bolts.
Overall, CNC milling offers greater flexibility for complex geometries, while CNC turning is generally faster and more efficient for round parts. The right machining process depends on the part geometry, size, material, tolerances, and production volume.
A CNC turning center is a computer-controlled machine designed to produce high-precision cylindrical parts. It can manufacture a wide range of components, including shafts, pins, screws, bushings, and other complex parts.
With its high level of versatility, a CNC turning center can perform various operations such as facing, external turning, threading, grooving, drilling, and complex contour machining.
Advanced control and automation systems help maintain consistent quality, high precision, and excellent repeatability, making CNC turning centers suitable for efficiently producing both simple and complex turned parts across a wide range of industries.
Production time depends on the complexity, quantity, and material of the part. Simple CNC-machined parts can often be completed within a few days, while larger orders or more complex parts may require additional time.
OSM will review the technical requirements, material, and production volume to determine the appropriate lead time for each project.
CNC turning costs depend on several factors, including material, part size, tolerances, complexity, surface finish requirements, and order quantity.
For an accurate quotation, you can upload your CAD file along with the relevant technical requirements. OSM’s engineering team will review your design and recommend a machining solution that meets your requirements.
Lead times can be as fast as 3 day for eligible parts. Standard lead times typically depend on material availability, order quantity, and finishing requirements.
CNC turning and CNC milling are both common subtractive machining processes, but they are suited to different part geometries. CNC turning is generally better for round, cylindrical, threaded, or shaft-like parts, while CNC milling is better suited for flat surfaces, pockets, slots, and complex 3D geometries.
If your part requires both rotational and milled features, OSM can provide custom CNC turning and milling services based on your design and technical requirements.
Choose custom CNC turning when your part is primarily round or cylindrical, such as shafts, pins, bushings, sleeves, washers, or threaded couplings. This process is ideal for producing precision turned parts with consistent dimensions and excellent repeatability.
Choose CNC milling when your part requires flat surfaces, pockets, slots, complex contours, or machining on multiple faces. Milling is better suited for components such as brackets, housings, plates, and parts with non-rotational geometries.
Some parts require a combination of CNC turning and milling. For example, a cylindrical part may also require flat surfaces, through holes, slots, or off-center features.
In these cases, combining CNC turning and milling can help reduce the number of setups, improve dimensional accuracy, and increase production efficiency, especially for parts that include both rotational and prismatic features.
An NDA Can Be Signed If Needed Before The RFQ.
