Precision CNC Machining Services
Custom metal and plastic parts. Whether it’s prototype manufacturing or high-volume parts production.
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Our Service
Rapid Protos helps you quickly turn your ideas into precision CNC machined parts. If you need custom metal or plastic CNC machined parts or inexpensive end-use products, Rapid Protos can help you make it happen fast.
We have 60+ 3-axis, 4-axis, and 5-axis CNC machines. We offer over 50 different models in metal and plastic materials and a variety of surface finish options. We guarantee fast turnaround and quality for one-off prototypes and production parts. Whether it’s low-volume or high-volume OEM manufacturing, CNC machining can handle it perfectly. At the same time, with the support of a network of over 50 partner suppliers, we can provide the fastest and cheapest solution for one-stop manufacturing of parts.
Latest Cases for CNC Machined Parts
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Main Processes Of CNC Machining
Why Choose us ？
At Rapid Protos (RPS), we have become a trusted CNC machining partner with advanced equipment, a professional team, and excellent service. Here are seven reasons to choose us:
20 Years of Industry Experience
Since its establishment in 2002, we have focused on high-precision CNC machining and accumulated rich industry experience.
Ensure High Quality
Equipped with more than 80 high-performance CNC machining equipment, the accuracy can reach ±0.005mm, supporting the processing of complex geometries, tiny features and large-sized parts.
Diverse Material Selection
Can process more than 100 types of materials, including: aluminum, titanium, stainless steel, copper, brass, POM, nylon, ABS, polycarbonate, etc.
Comprehensive Processing Capabilities
Provide complete manufacturing services from CNC milling, turning, drilling to surface treatment (such as anodizing, electroplating, spraying).
Strict Quality Management
We hold ISO9001, IATF16949, ISO13485 and other international certifications to ensure industry-leading quality standards.
Fast Global Delivery
Precise production scheduling and efficient logistics system ensure that projects are completed on time. We serve more than 3,000 customers worldwide
What is CNC Machining Service ?
CNC Machining Services is a service that uses computer numerical control (CNC) technology to manufacture high-precision parts. CNC machining is widely used in cutting, engraving, drilling and other processes of metals, plastics and other materials, and is suitable for a variety of needs from prototyping to mass production.
How CNC Machine Works ?
Usually the 3D design file will be compiled into the tool cutting path program used by the CNC machine tool, and after the CNC system is started, the CNC program will be distributed to the corresponding tools and machinery. These tools and machinery will perform the assigned cutting tasks. The CNC machining process includes the following stages:
Our CNC Machining Capability
Rapid Protos (RPS) is a one-stop metal and plastic parts manufacturing expert, relying on advanced equipment and rich experience to provide customers with efficient, accurate and reliable CNC machining services. The following are RPS CNC Machining Service Core Capabilities:
High-precision machining capabilities
Can achieve ±0.005mm high tolerance control, support high-precision machining of three-dimensional structures and complex features, such as cavities, curved surfaces and special-shaped structures.
Equipment Diversity
Equipped with more than 80 advanced CNC equipment, including: CNC lathes, CNC milling machines, five-axis machining centers, Swiss-type lathes, to meet all CNC machining needs.
Fast delivery and production flexibility
Flexible response to order changes, quick response to customer needs, whether it is prototypes and small batches, or large batch orders, on-time delivery.
Strict quality control
Passed ISO9001, IATF16949 and other international quality system certifications. Equipped with three-coordinate measuring machine (CMM), projector and laser measurement and other testing equipment to ensure that each part meets the specification requirements.
Available Materials for Custom CNC Machining Parts
CNC machines can handle many types of materials, and our material warehouse stocks a wide selection of materials to make complex custom parts quickly or in large quantities. We can provide you with instant quotes on over 50 different metals and plastics for your fabrication needs. You can also compare the prices of different processing materials.
Aluminum
Aluminum is a highly ductile metal, making it easy to machine. The material has a good strength-to-weight ratio and is available in many types for a range of applications.
Model: 2011,2024,5052,5083,6061,6063,6082,7075
Tolerances: ±0.025mm (±0.001″)
Steel
Steel is commonly used in the manufacture of this part due to its economical low cost, wide availability, ease of processing and good mechanical properties, excelling in strength and durability.
Model: 1018,1045,1095,1144,1215,4130,4140,4340,Q235
Tolerances: ±0.025mm (±0.001″)
Stainless Steel
Stainless steel is the low carbon steel that offers many properties that are sought after for industrial applications. Stainless steel typically contains a minimum of 10% chromium by weight.
Model: 303,304,316,304L,316L,410,416,420,17-4 PH
Tolerances: ±0.025mm (±0.001″)
Brass
Brass has desirable properties for a number of applications. It is low friction, has excellent electrical conductivity and has a golden (brass) appearance.
Model: C36000,C26000,C28000
Tolerances: ±0.025mm (±0.001″)
Bronze
Bronze possesses excellent machinability, wear resistance, corrosion resistance, and a low friction coefficient, making it widely used in industries such as machinery, electronics, and aerospace.
Model: C93200,C95400,C65500
Tolerances: ±0.025mm (±0.001″)
Copper
Copper displays excellent thermal conductivity, electrical conductivity and plasticity. It is also highly ductile, corrosion resistant and can be easily welded.
Model: C11000,C172000
Tolerances: ±0.025mm (±0.001″)
Titanium
Titanium has a number of material properties that make it the ideal metal for demanding applications. These properties include excellent resistance to corrosion, chemicals and extreme temperatures. The metal also has an excellent strength-to-weight ratio.
Model: Grade 1,2,4,5,9,23
Tolerances: ±0.025mm (±0.001″)
Plastic
CNC machining plastics has high precision and can process more than 10 kinds of plastic materials. It is widely used in product prototype and small batch manufacturing stage, with cheap price and short delivery time.
Model: Acylic, Nylon, HDPE, PEEK, PC, PTFE(Teflon), PE, PVC, ABS, POM etc.
Tolerances: ±0.025mm (±0.001″)
CNC Machining Tolerances and Standards
| Standards | CNC Milling | CNC Turning |
|---|---|---|
| Maximum Part Size | 1000×800×600 mm (39.4×31.5×23.6 in.) | 200×500 mm (7.9×19.7 in.) |
| Minimum Part Size | 4×4 mm (0.1×0.1 in.) | 2×2 mm (0.079×0.079 in.) |
| Minimum Feature Size | Φ 0.50 mm (Φ 0.00197 in.) | Φ 0.50 mm (Φ 0.00197 in.) |
| Standard Tolerances | Metals: ISO 2768-f Plastics: ISO 2768-m | Metals: ISO 2768-f Plastics: ISO 2768-m |
| Linear Dimension | +/- 0.025 mm (+/- 0.001 in.) | +/- 0.025 mm (+/- 0.001 in.) |
| Hole Diameters (Not Reamed) | +/- 0.025 mm (+/- 0.001 in.) | +/- 0.025 mm (+/- 0.001 in.) |
| Shaft Diameters | +/- 0.025 mm (+/- 0.001 in.) | +/- 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. | 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 | Diameter: Φ 1.5-5 mm, depth: 3×diameter Diameter: Φ 5 mm or more, depth: 4-6×diameter |
| Text | Minimum width of 0.5 mm, depth of 0.1 mm Rapid Protos can use CNC engraving or laser carving to create standard text based on customers’ requirements. | Rapid Protos can use laser marking to create standard text for CNC turned parts. |
| Lead Time | 3-12 business days for 1-50pcs | 3-12 business days for 1-50pcs |
Surface Finish Options
After the parts are processed, the surface treatment is carried out to form a unique surface layer to meet the hardness, corrosion resistance, and appearance requirements of the product. The choice of surface treatment depends on the material properties and application of the part. RPS offers the following surface treatment options for CNC-machined metal parts:
| Image | Name | Description | Materials | Color | Texture | Link |
|---|---|---|---|---|---|---|
| Anodizing | Anodizing improves corrosion resistance, enhancing wear resistance and hardness, and protecting the metal surface. Widely used in mechanical parts, aircraft, and automobile parts, precision instruments, etc. | Aluminum | Clear, black, grey, red, blue, gold. | Smooth, matte finish. | Learn More >> |
 | Bead Blasting | Bead blasting results in parts with a smooth surface with a matte texture. Used mainly for visual applications and can be followed by other surface treatments. | ABS, Aluminum, Brass, Stainless Steel, Steel | n/a | Matte | Learn More >> |
 | Powder Coating | Powder coating is a type of coating that is applied as a free-flowing, dry powder. Unlike conventional liquid paint which is delivered via an evaporating solvent, powder coating is typically applied electrostatically and then cured under heat or with ultraviolet light. | Aluminum, Stainless Steel, Steel | Black, any RAL code or Pantone number | Gloss or semi-gloss | Learn More >> |
 | Electroplating | Electroplating can be functional, decorative or corrosion-related. Many industries use the process, including the automotive sector, in which chrome-plating of steel automobile parts is common. | Aluminum, steel, stainless steel | n/a | Smooth, glossy finish | Learn More >> |
 | Polishing | Polishing is the process of creating a smooth and shiny surface, either through physical rubbing of the part or by chemical interference. The process produces a surface with significant specular reflection, but in some materials is able to reduce diffuse reflection. | Aluminum, Brass, Stainless Steel, Steel | n/a | Glossy | Learn More >> |
 | Brushing | Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes. | ABS, Aluminum, Brass, Stainless Steel, Steel | n/a | satin | Learn More >> |
Accurate Quotes at No Additional Cost
Rapid Protos can help you with accurate ordering and manufacturing processes through its in-house, self-developed quotation assistance system and engineers with more than ten years of drawing review experience for DFM analysis and manufacturing cost calculations. And provide the cheapest and fastest manufacturing process feasible solution.
From Prototyping to Production
CNC machining is a computerized and flexible way to make things. It is great for making prototypes quickly and making things as needed. Here are some of the custom CNC services that Rapid Protos has to offer.
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Application
RPS CNC machining services are widely used in industries such as automotive manufacturing, aerospace, medical devices, consumer electronics, industrial equipment, robotics and automation, drones and laser equipment. We excel in processing complex geometries and high-precision parts, supporting a variety of material options from lightweight materials to high-strength alloys to meet customers’ needs from prototyping to mass production. With advanced equipment and professional technology, RPS provides high-quality and reliable parts manufacturing solutions for various industries and is your ideal partner.
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