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Custom Precision CNC Turning Services
Glproto provides high-precision custom CNC turning for OEM prototypes and production. 3-, 4-, and 5-axis machining, we deliver tight tolerances up to 0.005 mm.
- Custom CNC Prototypes
- High and Low-Volume Machining
- Tight Tolerances
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On-demand CNC Turning Services by Glproto
Glproto offers reliable on-demand CNC turning services for your unique projects, delivering high-quality, precision-cut metal and plastic parts. As an ISO 9001:2015 certified manufacturer, we offer exceptional custom CNC turning globally, backed by over 15 years of experience.
With live tooling capability, our machines can efficiently produce axial and radial holes, flats, slots, and grooves — ensuring high repeatability and surface accuracy even on intricate designs. From rapid prototypes to high-volume CNC production, Glproto ensures each part meets exact design intent and performance standards.
Whether you’re a startup launching a first product or a global manufacturer, leverage our expertise to get durable, low-cost parts fast. Great Light delivers expert engineering, fast turnaround, and competitive pricing for your CNC turning projects.
Great Light CNC Turning Solutions for Every Manufacturing Stage
Our advanced online CNC machining services offer the flexibility to meet your design needs and development timelines. We produce prototypes, test parts, and low-volume production runs with the speed and accuracy needed for modern product development.
Rapid Prototyping CNC Turning
CNC turning services benefit from the ability to quickly produce high-precision CNC prototypes and functional milled parts. Accelerate innovation with precise, cost-effective prototyping.
Low and High-Volume CNC Turning
Whether you require small-batch or large-scale production, CNC turning services can meet your needs. Through strict tolerance control and comprehensive production capabilities, we not only guarantee quality but also fast delivery.
| Standard | Metal Part | Plastic Part |
|---|---|---|
| Max. Part Size | 1600 x 1400 x 800 mm | 1600 x 1400 x 800 mm |
| Min. Part Size | 1 x 1 mm | 1 x 1 mm |
| Min. Feature Sizes | φ 0.20 mm | φ 0.20 mm |
| (φ 0.00197 in.) | (φ 0.00197 in.) | |
| Standard Tolerances | ISO 2768-f | ISO 2768-m |
| Part Tolerance | 0.01 mm(0.0007 in.) | 0.01 mm(0.002in.) |
| Hole/Shaft Tolerance | 0.01 mm(0.0008 in.) | 0.01 mm(0.0008 in.) |
| Edge Condition | The corners of the item will be taken off in the form of a chamfer or radius, as outlined on the drawing. The size of the resulting chamfer or radius must also be specified. | |
| Threads and Tapped Holes | Diameter: 1.5 - 5 mm; Depth: 3*Diameter | Diameter: 1.5 - 5 mm; Depth: 3*Diameter |
| Diameter: 5+ mm; | Diameter: 5+ mm; | |
| Depth: 4 - 6*Diameter | Depth: 4 - 6*Diameter | |
| Text Engraving | Min. Width: 0.5 mm | Min. Width: 0.5 mm |
| Min. Depth: 0.1 mm | Min. Depth: 0.1 mm | |
| Lead Time | 3 Days | 3 Days |
| Method | Description |
|---|---|
| Anodizing | Electrochemical oxidation of metals or alloys. Form oxide film on aluminum. |
| Sanding & Polishing | A surface modification technology to obtain specific surface roughness. |
| Bead Spray + Anodizing | Form a dense oxide film on surface to increase corrosion resistance. |
| Water Plating | Equip different special water plating solutions according to various needs. |
| Vapour Polishing | Steaming and fumigation treatment improve the product's transparency. |
| Passivation | Transform the metal surface into a state not easy to be oxidized. |
| Hard Anodizing | Improve many properties of deformed and die-casting aluminum alloy parts. |
| Powder Coating | A coating film will be formed on the surface to achieve the particle effect |
| Painting | It is water & oil resistant and dry quickly, used to paint cars, wood, etc. |
| Chrome Plating | Metal chromium is easy to form a very thin passivation film on the surface. |
| Electrophoresis | Using charged particles' different moving speeds in to separate. |
| Electropolishing | Electrolyzes under specific conditions to make a mirror luster appearance. |
| Sandblasting | Roughening the surface by using the impact of high-speed sand flow. |
| Heat Treatment | Change the chemical composition and structure in the solid state. |
| Brushed | Form lines on surface by grinding to reflect the texture of metal. |
| Electroplate | Plating a thin layer of other metals or alloys on the surface of materials. |
| Etching | Usually referred to as etching, also known as photochemical etching, it refers to removing the protective film from the area to be etched through exposure plate making and development, and then contacting the chemical solution during etching to achieve the effect of dissolving corrosion and forming concave and convex or hollow molding effects. |
Precision Machining Techniques
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CNC machining employs precision machining techniques to ensure the highest quality standards in the finished products. Advanced CNC machines equipped with multi-axis capabilities enable intricate machining operations with exceptional accuracy and repeatability.
Rigorous Quality Control Measures
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Throughout the machining process, rigorous quality control measures are implemented to monitor and maintain the quality of the parts. This includes regular inspections using precision measuring tools to verify dimensions and tolerances, as well as in-process checks to detect any deviations from the specified parameters.
Experienced Machinists and Engineers
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Skilled machinists and engineers with extensive experience in CNC machining play a crucial role in ensuring the quality of the final products. Their expertise allows them to optimize machining processes, troubleshoot any issues that arise, and make necessary adjustments to achieve the desired quality standards.
Material Selection and Inspection
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The selection of high-quality materials is essential for ensuring the integrity and performance of CNC machined parts. Materials undergo thorough inspection before machining to verify their quality and suitability for the intended application. Any defects or inconsistencies are identified and addressed to prevent issues during the machining process.
Compliance with Industry Standards
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CNC machining facilities adhere to industry standards and certifications to guarantee the quality of their products. Compliance with standards such as ISO 9001 ensures that the machining processes meet strict quality management criteria, providing customers with confidence in the reliability and consistency of the finished parts.
Continuous Improvement Initiatives
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CNC machining facilities are committed to continuous improvement initiatives aimed at enhancing product quality and customer satisfaction. This includes ongoing training programs for staff, investment in new technologies and equipment, and regular reviews of machining processes to identify areas for optimization and refinement.
Why Choose Great Light For CNC Turning Services
With 15+ years of CNC turning experience, Great Light delivers expert service and quality support at every stage—before, during, and after production.
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CNC Turning Materials
We offer a diverse selection of CNC machining materials, including high-grade metal alloys, engineered plastics, wood, and composites. We carefully choose these materials based on requirements for strength, durability, and cost-efficiency. From rapid prototypes to full production, upload your CAD file to explore material options, get instant quotes, and achieve reliable custom CNC solutions. Check out some of the common materials for your CNC turning projects.
Metal Alloys
Aluminum Alloy(6061, 7075, 2024)
Aluminum alloys are lightweight, low-density, corrosion-resistant, and have good mechanical properties, making them an excellent material for the aerospace, electronics, and automotive industries.
Steel (Mild Steel & Hardened Steel)
Steel possesses high strength and durability. Low-carbon steel is easy to process; hardened steel is more wear-resistant.
Brass (C360, C260)
Brass has excellent machinability, corrosion resistance and electrical conductivity, making it suitable for precision components such as electronics, piping and decorative parts.
Titanium
Titanium has a high strength-to-weight ratio and corrosion resistance, and is often used in aerospace, medical and high-performance industrial applications.
Copper (C110, C101)
Copper has excellent thermal and electrical conductivity, making it the preferred material for electrical components and heat exchangers.
Stainless Steel (303, 304, 316, 17-4)
Stainless steel has excellent chemical durability, strength and surface finish, making it suitable for harsh application environments.
Magnesium (AZ31)
Magnesium is lightweight and has excellent processing properties, making it commonly used in the aerospace, automotive, and electronics industries.
Plastics
POM/Delrin
POM has high strength, low coefficient of friction and dimensional stability, making it suitable for gears, bushings and wear-resistant parts.
ABS
ABS is cost-effective and has excellent toughness, making it commonly used to manufacture durable prototypes, shells, and structural components.
Nylon (6/6)
Nylon is lightweight, flexible, and impact-resistant, making it the preferred material for gears, bushings, and sports equipment.
Polycarbonate (PC)
PC material is impact-resistant and has excellent transparency, making it suitable for lenses, protective covers, and functional prototypes.
HDPE/UHMWPE
HDPE has excellent corrosion resistance, low coefficient of friction and low moisture absorption, making it suitable for wear-resistant plates, bearings and bushings.
PMMA (Acrylic)
PMMA has high optical transparency and rigidity, making it suitable for lenses, displays, and signage.
PTFE (Teflon)
PTFE has excellent heat and chemical resistance, and provides excellent electrical insulation for seals, insulators, and chemically processed components.
PVC
PVC has excellent chemical resistance and is cost-competitive, making it ideal for fluid handling, housings, and CNC machined parts for a variety of industrial applications.
PEEK
PEEK is a high-performance thermoplastic with excellent strength, heat resistance and chemical stability, and is commonly used in the aerospace, medical and semiconductor industries.
Other Materials
Wood
Suitable for prototyping, furniture, signage, and custom projects.
Stone
Stone can be used to create complex architectural and artistic components.
Glass
Glass materials require high-precision CNC machining and are suitable for optical, technical and architectural applications.
Our CNC turning process supports a wide variety of other metals, plastics, and composites. You can even propose other materials.
CNC Turning Finishes
Enhance the quality of your custom CNC turning parts through superior surface treatment services, eliminating appearance defects and enhancing their corrosion resistance, wear resistance, and environmental stress resistance. This is part of our comprehensive CNC machining process.
Tolerances for CNC Milling
At Glproto, we maintain strict CNC turning tolerance standards to ensure every part meets precise dimensional accuracy and superior quality. Our standard tolerances follow ISO 2768-m for metals and ISO 2768-c for plastics, guaranteeing consistency and reliability across all production runs. Whether for prototypes or full-scale manufacturing, our advanced processes deliver cost-effective, precision-milled parts that meet your exact design requirements.
| Standards | CNC Turning |
|---|---|
| Maximum Part Size | 200×500 mm 7.9×19.7 in. |
| Minimum Part Size | 2×2 mm 0.079×0.079 in. |
| Minimum Feature Size | Φ 0.50 mm Φ 0.00197 in. |
| Standard Tolerances | Φ 0.50 mm Φ 0.00197 in. |
| Linear Dimension | +/- 0.025 mm +/- 0.001 in. |
| Hole Diameters (Not Reamed) | +/- 0.025 mm +/- 0.001 in. |
| Shaft Diameters | +/- 0.025 mm +/- 0.001 in. |
| Edge Condition | *Sharp corner will be removed in the form of a chamfer or radius. The size of the chamfer, or resulting radii, must be indicated on the drawing. |
| Threads and Tapped Holes | Diameter: Φ 1.5-5 mm, depth: 3×diameter Diameter: Φ 5 mm or more, depth: 4-6×diameter *3erp can produce threads of any specification and size required by our customers. |
| Text | 3erp can use laser marking to create standard text for CNC turned parts. |
CNC Turning Case Study
Optical Tube (Cylindrical Component)
- Material: Aluminum Alloy
- Quantity: One
Challenges
One of our classic cases is a custom precision CNC turning machine component. The part has a diameter-to-depth ratio of 1:16, requires an inner diameter tolerance of ±0.02 mm, and an inner surface roughness of Ra 0.2.
Our Solution
Maintaining machining accuracy and surface quality was challenging due to the long cavity. However, our team worked together to optimize the CNC programming design and delivered the part on time, meeting specifications. The customer was very satisfied with our service.
Glproto CNC Milling Services: Customer Reviews
We’ve been sourcing CNC machined parts from this factory for over two years now. Their precision, delivery speed, and willingness to accommodate custom requests are unmatched. It’s rare to find such a reliable and technically capable partner in this industry.
Michael Chen – Purchasing Manager
Their team has consistently delivered high-quality components that meet our tight tolerances. Communication is always clear and timely, and they’ve helped us solve multiple design challenges with their engineering support. A trustworthy CNC supplier we’re proud to work with.
James Turner – Operations Director
I’ve worked with many CNC suppliers, but this factory stands out. Their attention to detail and commitment to quality gives us the confidence we need for our high-performance assemblies. They’re not just a vendor — they’re a real manufacturing partner.
Robert Singh – Head of Engineering
From prototype to mass production, their team has been incredibly responsive and professional. The parts we receive are always consistent in quality and delivered on schedule. It’s been a great experience working with them on multiple projects.
David Müller – Product Development Manager
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FAQ's
What is CNC turning and how does it work?
CNC turning rotates workpieces against stationary cutting tools to create cylindrical parts. Computer programs control spindle speed, feed rate, and tool movements. This process efficiently produces shafts, bushings, and threaded components with tight tolerances.
What materials can you machine with CNC turning?
CNC turning handles aluminum, stainless steel, titanium, brass, copper, and engineering plastics. We process tool steels, Inconel superalloys, and PEEK for specialized applications. Material selection depends on mechanical properties and application requirements.
What tolerances can CNC turning achieve?
Standard CNC turning maintains ±0.05mm tolerances reliably. Precision turning achieves ±0.01mm for critical dimensions. Swiss-type machines reach ±0.005mm for medical and aerospace components. Actual tolerances depend on part geometry and material.
What is the difference between CNC turning and milling?
CNC turning rotates workpieces while tools remain stationary, ideal for cylindrical parts. Milling rotates cutting tools against stationary workpieces, creating prismatic geometries. Turning excels at shafts; milling handles complex contours and pockets.
When Can My CNC Machining Orders Be Ready?
A1: The primary benefits of CNC machining for the appliance industry are speed, precision, and repeatability. It allows for the rapid production of complex and high-quality components with extremely tight tolerances, which is crucial for ensuring parts fit together perfectly and function reliably. This automated process also reduces human error, leading to consistent quality across large production runs, and minimizes material waste, which helps lower overall manufacturing costs.
What is the minimum order quantity for CNC turning?
We accept CNC turning orders from single prototypes to high-volume production runs. No minimum quantity requirements exist. Prototype quantities start at one piece. Volume discounts apply for orders exceeding 100 units.
How long does CNC turning take for production?
Standard CNC turning lead times range 3-7 days for prototypes. Production runs require 1-3 weeks depending on quantity and complexity. Rush services reduce timelines to 24-48 hours. Complex geometries need additional setup time.
What surface finishes are available for turned parts?
CNC turned parts offer as-machined (Ra 1.6-3.2μm), polished (Ra 0.4-0.8μm), or specialty finishes. We provide anodizing, powder coating, nickel plating, and bead blasting. Finish selection depends on functional and aesthetic requirements.
Can CNC turning create threads and grooves?
CNC turning excels at threading operations, creating internal and external threads precisely. We machine metric, imperial, and custom thread profiles. Grooving tools cut O-ring seats, snap ring grooves, and undercuts efficiently.
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