Custom CNC Machining Services | Rapid Prototyping & Production
Turn your design concepts into precision parts with our CNC machining service. From rapid prototypes to high-volume production, get high quality and lightning-fast lead times—all at competitive pricing.
- Ultimate Precision: tolerance can reach ±0.0005 inches (0.012 mm)
- Quality Assurance: Possessing ISO 9001:2015 certification
- Rich Materials: over 100 types of metals, plastics, and composite materials in total
- Premium Surface Treatment: over 50 surface treatment solutions that balance aesthetics and functionality
Custom CNC Machining Services: From Prototype to Production
At Samshion, we provide custom CNC machining services tailored to your needs — from rapid prototyping to high-volume production.We specialize in 3/4/5-axis milling, CNC turning, EDM, and laser cutting, all supported by ISO 9001-certified processes for unparalleled precision.Whether you’re building prototypes, molds, or industrial parts, we deliver high-tolerance, industrial-grade components with fast turnaround — right the first time.
Comprehensive CNC Machining Solutions
Precision CNC Milling
Our CNC milling service is achieved through a technical team programming and debugging machines, utilizing advanced cutting tools and rotary tables for synchronous machining to accurately remove material from metal or plastic workpieces. It can ensure that complex geometric shapes have extremely strict tolerances. Samshion's precision milling is an ideal choice for prototypes, molds, and end use parts.
High-Precision CNC Turning
Utilizing horizontal lathes and Swiss-type lathes, we process rotating workpieces to manufacture precision components including shafts and threaded parts. This advanced machining technology ensures perfect assembly compatibility between components and their corresponding parts.This process is very suitable for automobiles, industrial equipment, etc., ensuring high precision, smoothness, and durability.
Custom CNC Machining Solutions for Every Need
High Precision Customized CNC Machining Solution
At Samshion, we offer end-to-end CNC machining solutions that ensure unparalleled quality and fast turnover, whether you need individual prototypes or large quantities of precision parts, through our ISO certified processes.
Rapid Prototyping, Rapid Validation Of Design
CNC prototyping is the key to rapid product development. We manufacture high-precision metal and plastic parts to test functionality, refine designs, and simulate actual performance, following ISO certified CNC processes, and can provide DFM solutions to help you ensure accuracy in each iteration, thereby accelerating time to market.
Low-Volume CNC Production For High-Performance Parts
CNC machining is very suitable for small batch production, even if you only need a few prototypes, we can provide cost-effective components with strict tolerances. And it can provide a variety of types and grades of material selection comparisons, which can help you simplify workflows, shorten delivery times, and effectively expand the application of high-tech industries.
Integrated Manufacturing with Samshion
Most CNC providers quote standalone machining, but Samshion redefines efficiency for orders exceeding 500+ units. We combine processes to avoid costly solid-block milling and maximize material performance.
For aluminum production, Samshion merges 3/4/5-axis CNC with tool-based fabrication, forging, and casting. This hybrid approach achieves intricate geometries while slashing per-unit costs for mass production.
Extrusions gain precision through post-machining. Castings meet ±0.05mm tolerances via CNC finishing. Forged blanks become aerospace-ready with our 5-axis milling. Samshion adapts to your technical demands.
Aluminum Extrusion + CNC Machining
Extrusion forces aluminum billets through custom dies to create continuous profiles. Samshion uses machinable grades like 6061 and 6063, optimized for post-CNC cutting, drilling, and milling. This hybrid approach delivers intricate cross-sections (±0.1mm tolerance) and irregular geometries. Ideal for automotive frames, heat sinks, and architectural systems requiring strength and precision.
Die Casting + CNC Machining
Die casting injects molten aluminum into high-pressure steel molds, ideal for mass production due to tooling costs. Samshion optimizes this for orders exceeding 1,000+ units. Post-casting, Samshion’s 5-axis CNC machines refine parts to ±0.05mm tolerances. Achieve intricate cooling channels, threaded holes, and polished surfaces – surpassing standalone process limits.
Forging + CNC Machining
Forging shapes aluminum alloys (e.g., 6061, 7075) under extreme compressive force, enhancing grain structure for unmatched durability. Samshion’s process is optimized for high-stress applications. Post-forging, Samshion’s 5-axis CNC machining achieves ±0.03mm tolerances. This hybrid method outperforms standalone casting or machining, delivering 30% stronger components at reduced costs.
Investment Casting + CNC Machining
Investment casting utilizes wax patterns to craft precise metal components, delivering flawless surfaces and tight tolerances without parting lines. Samshion’s process excels in aerospace and medical sectors requiring complex geometries. Samshion’s aluminum investment castings are CNC-machined to ±0.05mm accuracy, then enhanced with anodizing or ceramic coatings. Ideal for high-performance valves, turbine blades, and custom enclosures.
Custom CNC Machining Materials for Every Need
Materials for CNC Machining: Metals & Plastics for Custom Parts
At Samshion, we offer a variety of engineering grade metals and plastics suitable for CNC machining. We provide suitable materials for any customized parts, from magnesium and stainless steel to aluminum, brass, and titanium. Of course, we also offer other options such as superhard alloys and engineering grade plastics. We also have an ISO certified inspection laboratory to test all materials, confirm chemical and physical properties before production begins, provide material certification, and ensure quality and compliance.
Metal
Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper, Titanium Alloy, Magnesium Alloy, Zinc Alloy, Nickel Alloy
These metals are perfect for creating durable, high-performance components across industries, from aerospace to automotive and medical applications.
Plastic
ABS, PC, PA (Nylon), POM (Acetal/Delrin), PEEK, PPS, HDPE, PVC, Teflon, Bakelite, Epoxy Tooling Board
Our engineering-grade plastics are ideal for producing lightweight, high-strength parts, from prototypes to production runs. These materials are commonly used in electronic, consumer, and medical device applications.
Description:
Aluminum alloys are engineered metallic materials composed primarily of aluminum combined with elements such as copper, magnesium, silicon, or zinc. Renowned for their exceptional strength-to-weight ratio, corrosion resistance, and versatility, aluminum alloys are widely used across industries ranging from aerospace to consumer electronics.
Alloys:
6061-T6, 7075-T6, 7050, 2024, 2A12,6082,5083,5052, 6063, MIC6.etc.
Finishing Options:
Alodine, Anodizing Types II, III, III + PTFE, ENP, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing.
Description:
Stainless steel is a corrosion-resistant iron-based alloy containing a minimum of 10.5% chromium, combined with elements like nickel, molybdenum, and carbon. Renowned for its durability, aesthetic versatility, and hygienic properties, stainless steel is a cornerstone material in industries ranging from medical devices to architectural design.
Alloys:
303, 304L, 316L, 410, 416, 440C, 17-4PH, Nitronic 60.etc.
Finishing Options:
Electropolishing, ENP, Media Blasting, Nickel Plating, Passivation, Powder Coating, Tumble Polishing, Black Oxide, Zinc Plating, Vibratory Tumbling.
Description:
Copper, a ductile and malleable metal with exceptional electrical and thermal conductivity, is a cornerstone of modern technology and industrial applications. Known for its natural reddish-brown hue, corrosion resistance, and recyclability, copper and its alloys are indispensable in sectors ranging from electronics to renewable energy.
Alloys:
C1100,C1011.etc.
Finishing Options:
Media Blasting, Nickel Plating, Passivation, Tumble Polishing, Vibratory Tumbling.etc.
Description:
Brass alloys are versatile metallic materials primarily composed of copper and zinc, often enhanced with elements like lead, tin, or aluminum. Known for their excellent machinability, corrosion resistance, and aesthetic appeal, brass alloys are widely utilized in industries such as plumbing, musical instruments, decorative hardware, and electrical components.
Alloys:
C260, C360, C464, C485, C280, C220, C230, C510, C544, C675.
Finishing Options:
Polishing, Electroplating (Nickel, Chrome), Clear Lacquering, Antiquing, Powder Coating, Passivation, Sandblasting, Brushed Finish, Hot-Dip Galvanizing, Laser Etching.
Description:
Steel alloys are engineered metallic materials primarily composed of iron and carbon, often enhanced with elements like chromium, nickel, or molybdenum. Renowned for their exceptional strength, durability, and resistance to wear and corrosion, steel alloys are extensively used in industries such as construction, automotive manufacturing, industrial machinery, and tooling.
Alloys:
1045 Carbon Steel, A36 Mild Steel, 4140 Chromoly Steel, 4340 High-Strength Steel, D2 Tool Steel, A2 Tool Steel, 52100 Bearing Steel, 8620 Case-Hardening Steel.
Finishing Options:
Heat Treatment (Quenching, Tempering), Galvanizing, Powder Coating, Electroplating (Nickel, Chrome), Media Blasting, Passivation, Polishing, Black Oxide Coating, Anodizing, Laser Engraving.
Description:
Titanium alloys are advanced metallic materials primarily composed of titanium blended with elements like aluminum, vanadium, or nickel. Renowned for their exceptional strength-to-weight ratio, corrosion resistance, and biocompatibility, titanium alloys are critical in high-performance industries such as aerospace, medical implants, marine engineering, and chemical processing.
Alloys:
Ti-6Al-4V (Grade 5), Ti-3Al-2.5V (Grade 9)
Finishing Options:
Anodizing (Type II, III), Media Blasting, Electropolishing, Passivation, Thermal Oxidation, PVD Coating, Laser Marking, Chemical Etching, Powder Coating, Grinding/Polishing.
Description:
Magnesium alloys are lightweight metallic materials primarily composed of magnesium combined with elements such as aluminum, zinc, or manganese. Renowned for their exceptional strength-to-weight ratio, vibration damping properties, and machinability, magnesium alloys are widely utilized in high-performance industries including aerospace, automotive lightweighting, consumer electronics, and biomedical devices.
Alloys:
AZ31B, AZ91D,
Finishing Options:
Anodizing (Type I, II), Chemical Conversion Coating (Chromate, Phosphate), Electroplating (Nickel, Copper), Powder Coating, Laser Etching, Passivation, Polishing, PVD Coating, Epoxy Sealing, Thermal Spraying.
Description:
ABS (Acrylonitrile Butadiene Styrene) is a versatile thermoplastic polymer celebrated for its excellent impact resistance, thermal stability, and ease of processing. Combining rigidity, surface gloss, and electrical insulation properties, ABS is extensively utilized in automotive parts, consumer electronics, household appliances, toys, and industrial piping systems.
Colors:
Opaque beige, Black.
Finishing Options:
As machined, Media blasting, Polishing, Painting, Texture coating, Clear lacquering, Electroplating
Description:
POM (Polyoxymethylene) is a high-performance engineering thermoplastic renowned for its exceptional mechanical strength, low friction coefficient, superior dimensional stability, and resistance to chemicals. With outstanding wear resistance and anti-creep properties, POM is widely used in precision mechanical components, gears, bearings, electronic connectors, medical devices, and automotive systems.
Colors:
White, Black.
Finishing Options:
As machined, Media blasting, Polishing,
Description:
Nylon is thermoplastic with high strength, wear resistance, excellent sound/vibration dampening, and low friction coefficient. It is commonly used in engineering and manufacturing processes. Common applications include gears, bearings, and bushings. Two of the most notable use cases for Nylon are in medical devices and electronics insulation, notably screws and spacers for panel mounted circuit boards.
Colors:
Opaque beige, Black.
Finishing Options:
As machined, Media blasting, Polishing,
Description:
PEEK, (polyether ether ketone) is a thermoplastic widely used in industries such as aerospace, automotive, and electronics. PEEK has high strength, stiffness, toughness, chemical, biocompatibility, and thermal resistance. Due to its , PEEK is also suitable for use in harsh environments where other materials may fail. Common applications include aircraft structures, electronic components that require high temperature resistance, and medical and dental components (including implantables).
Colors:
Opaque beige
Finishing Options:
As machined, Media blasting, Polishing,
Description:
PE is flexible, chemical-resistant, and impact-resistant.
Lightweight and cost-effective, this material is ideal for packaging, containers, and piping systems where durability and adaptability are essential.
Color:
Natural White,Black,
Finishing Options:
As machined, Sand blasting, Tumbling,
Description:
Polycarbonate (PC) is renowned for its exceptional clarity, high impact resistance, and thermal stability. Widely used in optical lenses, automotive components, and protective equipment, PC maintains structural integrity under stress while offering lightweight versatility.
Color:
Transparent,Black,
Finishing Options:
As machined, Media Blasting, Polishing, Anti-Scratch Coating, Painting, Textured Finish, Laser Etching
Description:
HIPS is lightweight, impact-resistant, and easy to machine.
Ideal for prototyping and consumer products, this material balances durability and cost-effectiveness while offering excellent surface finish for aesthetic applications.
Color:
Natural White,Black,
Finishing Options:
As machined, Media blasting, Polishing, Painting, Texture coating, Clear lacquering, Electroplating
Standard Tolerances for Linear Dimensions (ISO 2768)
Values in millimeters
| Basic Size Range | Fine (±) | Medium (±) | Coarse (±) | Very Coarse (±) |
|---|---|---|---|---|
| 0.5 ≤ 3 | 0.05 | 0.1 | 0.2 | – |
| >3 ≤ 6 | 0.05 | 0.1 | 0.3 | 0.5 |
| >6 ≤ 30 | 0.1 | 0.2 | 0.5 | 1 |
| >30 ≤ 120 | 0.15 | 0.3 | 0.8 | 1.5 |
| >120 ≤ 400 | 0.2 | 0.5 | 1.2 | 2.5 |
| >400 ≤ 1000 | 0.3 | 0.8 | 2 | 4 |
| >1000 ≤ 2000 | 0.5 | 1.2 | 3 | 6 |
| >2000 ≤ 4000 | – | 2 | 4 | 8 |
Samshion’s CNC Machining Tolerance Standards
At Samshion, we adhere to ISO 2768 standards for precision:
Plastic Parts: Medium tolerance (ISO 2768-M) for cost-effective production.
Metal Parts: Fine tolerance (ISO 2768-F) for high-accuracy applications.
Typical Tolerance Ranges:
Standard: ±0.005” (±0.127 mm)
High Precision: ±0.002” (±0.05 mm)
For mission-critical components requiring tighter tolerances (e.g., ±0.001” or ±0.025 mm), submit a 2D engineering drawing with detailed specifications. Our engineering team will collaborate with you to optimize manufacturability and ensure flawless execution.
Part lengths of up to 40″ are available on our platform process dependent. Please inquire about anything larger. Tolerances listed here are minimums for an ideal case. Looser tolerances may be required depending on process, material choice, or part geometry.
Custom CNC Machining Surface Finishes for Enhanced Durability and Appearance
CNC Machining Surface Finishes: Bead Blasting, Anodizing & More
We provide a comprehensive selection of premium surface finishes for your CNC-machined components, ensuring both functional and aesthetic qualities. Our services include bead blasting, anodizing (Type II & Type III), electroplating, powder coating, and advanced protective coatings, tailored to meet your specific performance and visual requirements.
As Machined
The as-machined finish delivers parts directly from CNC machining, retaining minor tool marks for a cost-effective solution. Ideal for functional prototypes and non-critical components requiring no post-processing.
Anodizing
Anodizing enhances corrosion resistance, wear resistance, and aesthetics for aluminum parts. Custom colors and glossy finishes available.
Polishing
Achieve a mirror-like finish with polishing, reducing surface roughness to Ra 0.2 µm. Perfect for luxury products and optical components.
Sand Blasting
Sand blasting creates a uniform matte texture, hiding imperfections and improving paint adhesion. Uses pressurized media for consistent results.
Tumbling
Tumbling smooths edges and surfaces via friction in a rotating barrel, offering a slightly textured, uniform finish for small parts.
Electropolishing
Electropolishing chemically removes surface layers to enhance smoothness, brightness, and corrosion resistance. Ideal for stainless steel and medical devices.
Alodine
Alodine coating provides corrosion protection and paint adhesion for aluminum, with a conductive yellow film.
Heat Treatment
Heat treatment enhances metal properties like hardness, strength, or ductility in a controlled vacuum environment.
Brushed Finish
A brushed finish creates a unidirectional satin texture, masking scratches and adding aesthetic appeal.
Powder Coating
Powder coating applies a thick, wear-resistant polymer layer with vibrant color options and UV resistance.
Nickel Electroplating
Electroplating deposits a thin nickel layer for enhanced wear resistance, conductivity, and corrosion protection.
Black Oxide Coating
Black oxide forms a magnetite layer on ferrous metals, reducing glare and improving corrosion resistance.
CNC Machining Design Guidelines
Optimize Your CNC Designs for Maximum Efficiency
At Samshion, we provide expert CNC design guidelines to ensure manufacturability, reduce production costs, and deliver flawless CNC-machined parts. Our team offers real-time Design for Manufacturability (DFM) feedback, helping you refine your designs for optimal precision and efficiency.
Why Following These Guidelines Matters
Reduce Costs: Avoid redesigns and tooling conflicts.
Speed Up Production: Streamlined designs enable 3-5 day lead times.
Ensure Quality: Achieve ±0.02 mm tolerances with ISO 9001-certified processes.
Design Guidelines for Radii & Internal Corners
Sharp internal corners naturally form rounded edges (radii) in CNC machining. To ensure tool longevity and precision:
Drill Depth: Keep to ≤12x drill diameter to prevent tool stress.
End Mill Depth: Limit to ≤10x tool diameter for better tool life and smoother cuts.
Design Tip: Avoid deep, narrow cavities to prevent tool deflection and ensure consistent results.
Guidelines for Threads & Tapped Holes
To ensure reliable threading and avoid issues, follow these specifications:
Small Threads (≤5 mm): Depth should be ≤ 3× diameter.
Large Threads (>5 mm): Depth should be ≤ 4-6× diameter.
Custom Solutions: We machine any thread size and specification, including metric, UNC, and UNF threads, ensuring precision and reliability.
Undercut Design for Seamless Machining
Undercuts are essential for creating complex parts with seamless features. To ensure smooth machining and reduced costs:
Types Supported: Square profiles, full-radius grooves, and dovetail undercuts.
Best Practices: Always specify undercut dimensions in CAD files and use standard tooling sizes to minimize production costs.
Text & Engraving Guidelines for CNC Machining
Ensure legibility and durability for engraved text:
CNC Milling: Minimum 0.5 mm width and 0.1 mm depth for clear and readable text.
CNC Turning: Use laser marking for permanent, clear text on round or cylindrical parts.
Options: Choose CNC engraving or laser marking for custom fonts or symbols.
Why Choose Samshion's CNC Machining Services?
At Samshion, we deliver precision, quality, and affordability for CNC machining services at any volume. Our team is dedicated to responding quickly to your needs and ensuring exceptional results, whether you need a single prototype or high-volume production.
- Experienced Team with Expertise: Our skilled engineers and technicians have extensive experience in CNC machining, ensuring high-quality, accurate parts every time.
- Advanced In-House Equipment: We use the latest CNC machines, ensuring precise and reliable results across all projects, from complex geometries to high-precision parts.
- Competitive Prices in the Industry: We provide cost-effective solutions without compromising on quality, making sure you get the best value for your investment.
- One-to-One Collaboration & Proactive DFM: We collaborate closely with you during every stage, providing Design for Manufacturability (DFM) feedback to optimize designs for better efficiency and manufacturability.
- High Complexity Machining Capability: Our advanced capabilities enable us to handle complex machining projects with high precision and tight tolerances, delivering parts that meet stringent industry standards.
- Industry-Leading Turnaround Times: With streamlined workflows and cutting-edge technology, we offer some of the fastest lead times in the industry, ensuring your project stays on schedule.
Choose Samshion for high-quality CNC machining solutions that are reliable, affordable, and tailored to your needs.
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CNC Machining Parts Succesful Examples
CNC Machining FAQs
What kind of CNC machining services do you offer?
CNC machining is also known as computer numerical control machining. We offer the following machining services: milling, turning, drilling, threading, tapping, EDM and wire-cutting, custom surface treatments, prototyping, small batch or single-use parts machining. From prototype to production, from 1 to 10,000 pieces, we offer fast turnaround CNC machining for your custom metal and plastic parts, the fastest delivery time can be within 3 days.
What kind of surface finish does CNC machining leave behind?
After machining,there are slightly tool marks on the part surface which is called “machining marks” or “milling marks” surface finishing.The standard machining surface roughness(Ra) is 1.6-3.2μm. We can improve to 0.8-1.6μm or better 0.2-0.8μm but it takes more operation time and cost.
What is the cost of CNC machining parts?
Our engineering and sales teams will provide one-to-one quote support for your project.In general,for similar parts,the machining cost of CNC lathes is 15% lower than that of standard 3-axis CNC milling.In contrast, the cost of 5-axis machining increases, and the cost of 5-axis linkage milling is higher than that of a 5-axis machine (also known as 3+2 milling) by 20%, about twice as much as a standard 3-axis milling machine.
What is the maximum size range of your machine travel?
Max size of the 3-axis milling is 1500×808×635（mm） Max size of the 5-axis milling is 1016×635×635（mm),Work table diameter is Φ1000 mm
What are your CNC machining capabilities?
We have 3000 square meters of CNC machining workshop. With 60+ skilled employees and 20 high-performance CNC machines, it maintains 24/7 operations and can deliver more than 400 machining projects and 30,000+ machined parts per month.
How do you guarantee our quality requirements?
We are ISO9001 quality system certified factory and we have professional testing equipment and QC/QA personnel. 2D reports, CMM reports can be provided to ensure that you want the part within the tolerance. From process control plans (PCP) and FMEA to part-by-part job descriptions, parameter sheets and standardized workflows, we are able to consistently produce stable parts on time.
How soon can we have your quote?
Our professional quotation team will generally provide you with the most competitive price within 24 hours, if there are other problems causing the extension of time, our sales team will inform you in advance.
How soon can you deliver?
There is no standard lead time,usually 3 days to several weeks.It depends on your requested quantity and the complexity of the parts.For the day we get your PO, our technical team will evaluate and confirm the best lead time to you.
How can I get a quote?
We accept 2D and 3 drawings in any format, such as STP, IGES, X_T, DWG, PDF, STL and other formats CAD drawings; Also please provide the expected quantity, required materials and production process requirements, surface treatment requirements (including machined surfaces (standard), anodizing, painting, etc.). If you have target price or lead time,you can also reach out.
