Custom CNC Machining Services
Turn CAD models and engineering drawings into custom metal and plastic parts with a process route matched to geometry, material, tolerance, quantity and end use. SAMSHION supports CNC milling, turning, multi-axis machining and complementary processes for prototypes, bridge builds and repeat production.
- Milling, turning and multi-axis routing based on part geometry
- Metals and engineering plastics reviewed by grade and stock form
- Prototype, bridge and repeat-production support
- Finishing and inspection requirements planned before production
- All uploads are secure and confidential.
- Quote within 1 hour
- 1-15 days lead time
- ISO 9001
- STEP / IGES accepted
CNC Machining from Prototype to Repeat Production
A successful CNC project starts with more than a toolpath. The manufacturing route must connect design intent, stock condition, workholding, cutter access, datum strategy, secondary operations and inspection. Our role is to review those relationships before production and build a practical route for the required quantity.
The same CAD model may be produced in different ways. A plate or housing may suit CNC milling, a shaft may favor turning, and a multi-face component may justify five-axis machining. For repeat demand, an extrusion, casting or forging may also be evaluated as a near-net-shape blank before finish machining. The best route depends on the complete requirement, not on a single machine name.
Choose the Right CNC Machining Capability
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.
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.
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.
What Is CNC Machining?
CNC machining is a subtractive manufacturing process in which programmed machine tools remove material from a workpiece. The program controls tool motion, feeds, speeds and operation sequence, while the physical result still depends on workholding, tool condition, machine capability, material behavior and inspection.
The process normally begins with a 3D model and, when required, a 2D drawing. CAM software converts geometry into toolpaths and a post-processor generates machine-specific code. A machinist or manufacturing engineer then reviews setup, tooling, collision risk, datum transfer and verification before production.
Why Choose SAMSHION for Custom CNC Machining?
Process Selection Before Production
We review whether milling, turning, multi-axis machining, EDM or a combined route is appropriate before assigning the work. This helps prevent unnecessary setups and unsuitable process choices.
DFM Connected to Function
DFM feedback focuses on tool access, workholding, wall stiffness, internal radii, thread depth, datum strategy, finish allowance and inspection access. Changes are proposed for review rather than applied without approval.
Prototype-to-Production Continuity
Approved prototypes can provide a baseline for later bridge or repeat production. The production route may still change when quantity, stock form, fixture economics or inspection scope changes.
Drawing-Based Quality Planning
Inspection is planned from critical characteristics, functional interfaces and agreed documentation. A universal tolerance or report package is not assumed for every project.
From Prototype to Repeat CNC Production
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.
Prototype
Use CNC machining to evaluate geometry, material behavior, assembly and function. Identify which dimensions must represent production intent and which features are still being refined.
Bridge Production
Bridge builds support validation, pilot demand or market introduction while the final production route is being established. Revision control and first-off approval become increasingly important.
Repeat Production
Stable repeat orders depend on controlled workholding, approved programs, tool-life management, in-process inspection and traceability appropriate to the project. Quantity alone does not define the route.
Integrated Manufacturing
Machining every feature from a solid block may be appropriate for prototypes and flexible low-volume demand, but it is not always the best long-term route. For recurring quantities, SAMSHION can evaluate extrusions, castings or forgings as starting blanks when geometry, material performance and tooling economics justify them.
Extrusion + CNC Machining
An extrusion may reduce waste and machining time for parts with a consistent cross-section. Die cost, extrusion tolerance, straightness, alloy, temper and machining allowance must be reviewed before the route is selected.
Casting + CNC Machining
A casting can create near-net geometry for repeat production, followed by machining of datums, bores, sealing faces, threads and other controlled features. Tooling, porosity risk, material condition and inspection requirements remain project-specific.
Forging + CNC Machining
A forged blank may be considered where material flow, strength or stock reduction supports the design. Alloy, heat treatment, grain direction, machining allowance and qualification requirements must be confirmed before claiming a performance benefit.
From Quote to CNC Machined Parts
Upload Files
Send the 3D model, 2D drawing, material, quantity, finish and inspection requirements.
Engineering Review
We review geometry, process selection, stock, workholding, tool access and documentation scope.
Confirm the Route
Clarifications, approved DFM changes, commercial terms and lead time are recorded before production.
Machine and Monitor
Parts are produced using the approved route with first-off and in-process checks appropriate to risk.
Finish and Inspect
Secondary operations, cleaning, finishing and final inspection follow the agreed requirements.
Pack and Ship
Parts are protected, identified and shipped with the documentation included in the order.
CNC Machining Materials
Material grade, condition and stock form influence cutting behavior, stability, finish, corrosion resistance, certification and cost. Review our manufacturing materials guide for broader comparisons, then state the exact grade, temper or condition in the RFQ.
Metal
Common families include aluminum alloys, carbon and alloy steels, stainless steels, copper alloys, titanium alloys, magnesium alloys and selected nickel alloys. Availability and machinability vary by exact grade and stock form.
Plastic
Common families include acetal, nylon, polycarbonate, ABS, PEEK, PPS, PTFE, polyethylene and other machinable plastics. Moisture, thermal expansion, stress, reinforcement and dimensional stability must be considered for close-tolerance parts.
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
Surface Finishes for CNC Machined Parts
Finishing can modify corrosion resistance, wear, appearance, conductivity, friction or cleanability. Options may include as-machined surfaces, bead blasting, anodizing, conversion coating, passivation, polishing, brushing, plating, black oxide, heat treatment and powder coating, depending on material and requirement.
Review our surface finishing options and specify color, texture, coating thickness, masking, cosmetic class, critical interfaces and any dimensions that apply after finishing.
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.
Quality Control for CNC Machined Parts
Our quality assurance and inspection approach begins with the drawing, process risk and documentation agreed during quotation.
- Review the CAD model, drawing revision and material specification before production.
- Confirm critical characteristics, datums, thread gauges, surface requirements and report scope.
- Approve the first-off part before continuing when the project requires staged production.
- Use appropriate calibrated equipment for feature geometry and tolerance.
- Record nonconformities and obtain disposition before unauthorized rework or deviation.
CNC Machining Design Guidelines
Provide Tool Access
Avoid features that cannot be reached from a practical cutter direction. Deep cavities, hidden surfaces and obstructed features may require additional setups, long tools, EDM or a design change.
Use Practical Internal Radii
Internal corners inherit the radius of the cutting tool. Larger radii generally permit stronger tools and more efficient machining when function allows.
Control Pocket Depth and Thin Walls
Deep pockets and slender walls increase tool deflection, vibration, heat and part movement. Use gradual transitions, accessible geometry and sufficient support where possible.
Specify Threads Completely
State thread standard, size, pitch, class, depth and inspection requirement. Provide relief near shoulders and consider how coatings affect fit.
Define Datums and Critical Interfaces
Datums should reflect how the part functions and can be located during machining and inspection. Cross-face relationships may drive setup and machine selection.
Plan Finishing and Inspection Access
Allow for coating buildup, masking, edge condition and measurement access. Cosmetic expectations should be supported by a defined class, sample or objective requirement.
For a broader review, use our CNC design for manufacturability guide.
CNC Machining Parts Succesful Examples
CNC Machining FAQs
What files should I send for a CNC machining quote?
Send a 3D model and a 2D drawing when tolerances, threads, surface finish, datums or inspection requirements are controlled. Include material, quantity, finish and documentation needs.
Do you support both prototypes and production parts?
Yes. The suitable route depends on design maturity, quantity, material, finishing and inspection. Prototype and production processes may differ when repeat demand justifies dedicated fixtures or near-net-shape blanks.
What tolerance can CNC machining achieve?
Tolerance is reviewed by feature. Part size, geometry, material, wall thickness, setup count, finish and measurement method all affect the practical result. Put critical requirements on the drawing for review.
How do I choose between milling and turning?
Milling generally suits prismatic geometry, while turning generally suits rotational geometry. Mixed parts may require live tooling or secondary operations.
When should I consider 5-axis machining?
Consider five-axis machining when angled, contoured or multi-face features benefit from improved access or fewer repositioning steps. Simple parts may be more economical on conventional equipment.
Can CNC machined parts receive surface finishing?
Yes. Compatibility, coating buildup, masking, cosmetic class and post-finish dimensions should be reviewed before production.
Can you machine customer-supplied material?
Customer-supplied material may be reviewed case by case. Confirm identification, condition, dimensions, certification, replacement responsibility and machining allowance before shipment.
What affects CNC machining lead time?
Material availability, geometry, quantity, programming, tooling, workholding, secondary operations, finish and inspection scope all affect lead time. The confirmed quotation controls the schedule.
