CNC Machining

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CNC Machining Services


CNC Milling


CNC Turning

Standard and live tooling capabilities for cylindrical parts such as pins, shafts, and spacers.

The Wire EDM machine cutting the gear shape of die insert. The mold and die manufacturing process by wire cut machine control by CNC program.

Electrical Discharge Machining

Wire and Sinker EDM are non-contact machining methods for cutting deep pockets, complex internal features, and holes with a keyway.

What is CNC Machining?

CNC, or computer numerical control machining, is a widely used manufacturing process that uses automated, high-speed cutting tools to form designs from metal or plastic stock. Standard CNC machines include 3-axis, 4-axis, and 5-axis milling machines, lathes, and routers. Machines may vary in how CNC parts are cut—the workpiece may remain in place while the tool moves, the tool may remain in place while the workpiece is rotated and moved, or both the cutting tool and workpiece may move together. 

Skilled machinists operate a CNC machine by programming tool paths based on the geometry of the final machined parts. The part geometry information is provided by a CAD (computer-aided design) model. CNC machines can cut almost any metal alloy and rigid plastic with high precision and repeatability, making custom machined parts suitable for nearly every industry, including aerospace, medical, robotics, electronics, and industrial. Xometry provides CNC services and offers custom CNC quotes on over 40 materials ranging from commodity aluminum and acetal to advanced titanium and engineered plastics like PEEK and Teflon.

CNC Machining Tolerances


Maximum Part Size

Milled parts up to 80” x 48” x 24” (2,032 x 1,219 x 610 mm). Lathe parts up to 62” (1,575 mm) length and 32” (813 mm) diameter.

Standard Lead Time

3 business days

General Tolerances

Tolerances on metals will be held to +/- 0.005″ (+/- 0.127 mm) in accordance with ISO 2768 unless otherwise specified. Plastics and composites will be +/- 0.010”.

Xometry can manufacture and inspect to tight tolerances, including sub +/- 0.001″ tolerances, per your drawing specifications and GD&T callouts.

Minimum Feature Size

0.020” (0.50 mm). This may vary depending on part geometry and chosen material.

Xometry can accommodate any standard thread size. We can also machine custom threads; these will require a manual quote review.

Edge Condition

Sharp edges are broken and deburred by default

The standard finish is as-machined: 125 Ra or better. Additional finishing options can be specified when getting a quote.


How to work with us

1.Sending CAD Files To Email or LinkedIn

First, you can send CAD files and detailed information (material, quan-tity, tolerance, etc.) to us  Email or Linkedin .

2.Manufacturability Analysisand Offering Quotation

Secondly, we will analyze manufactur-ability based on drawings of productsand give you a favorable quotation.

3.Start manufacturing!

Thirdly, we will start manufacturing process once all relevant deatials are fully confirmed.

4.Parts are Completedand Shipped

Finally, we will carefully pack and shipthe goods when the products are completed.


We Are Here For You

Ready to Get a Injection Molding Quote? Free shipping available for domestic Injection Molding orders ; learn more!

CNC Machining Design Tips

FeatureDesign Consideration
Internal corner filletsEnsure that internal corner fillets have a radius 0.020” – 0.050” greater than a standard drill size. Maintain a drill diameter to depth ratio of 1:6 (1:4 recommended) for internal corner radii.
Floor filletsSize floor fillets smaller than corner fillets, allowing the same tool to efficiently clear material from the interior.
UndercutsDesign undercuts to standard sizes, positioning them away from corners for accessibility by the cutting tool.
Tapped/threaded hole depthExtend tool clearance slightly beyond the tapped hole depth to guarantee complete threads.
ComplexityMinimize the number of small cuts to reduce CNC machining costs. Only incorporate necessary features to strike a balance between function and aesthetics.

* Quoting response times reflect requests received during business hours, requests received outside business hours will be addressed the following business day.

CNC Machining Parts Made By BOYI

Finishing Options for CNC Machining

NameApplicable MaterialsColorsCan Be Applied with
AlodineAluminum, MagnesiumGolden, ClearChemical treatment
AnodizingAluminum, TitaniumVariousDyes and chemicals
Black OxideFerrous Metals (Steel, Stainless Steel)BlackOxidation process with hot and cold baths
Electroless Nickel PlatingVarious MetalsSilverChemical deposition without electrical current
ElectropolishingStainless Steel, AluminumSilver, BrightElectrolytic process
Hand PolishingMetals (Aluminum, Stainless Steel, etc.)CustomizableManual polishing with abrasive materials
Media BlastingMetals, PlasticsNatural FinishHigh-pressure air and abrasive beads
Nickel PlatingVarious MetalsSilverElectroplating process
PassivationStainless SteelTransparentChemical treatment
Powder CoatingMetals (Steel, Aluminum, etc.)Wide RangePowder particles and heat
TumblingMetals (Aluminum, Brass, etc.)Matte FinishAbrasive media and rotating barrel
Vapor PolishingPlastics, MetalsClear, SmoothVaporized solvent and polishing agents
Zinc PlatingSteel, IronSilverElectroplating process

Need Help?


CNC machining operates through computer numerical control, where automated tools and machinery follow precise programming to cut, shape, and assemble materials with high accuracy.

Compared to traditional machining, CNC machining offers greater precision and efficiency, as it is computer-controlled and eliminates the need for manual intervention in each step of the process.

The history of CNC machining dates back to the 1940s, evolving from early numerical control systems. Over time, technological advancements have refined CNC machining into a widely adopted manufacturing method.

To ensure precision and quality, inspection options for CNC machined components include coordinate measuring machines (CMM), optical measurement systems, and rigorous visual inspections.

To ensure precision and quality, inspection options for CNC machined components include coordinate measuring machines (CMM), optical measurement systems, and rigorous visual inspections.

Tolerances for machined parts vary based on project requirements but are consistently maintained to ensure accuracy and reliability in the final product.

CNC machining and turning capabilities cover a wide range of materials, sizes, and complexities, including metals, plastics, and composites, with the ability to handle both small and large-scale projects.

Yes, Quick-Turn CNC Machining services are available to meet the time-sensitive requirements of projects, providing efficient and rapid manufacturing solutions.

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See What Our Customers Say

"BOYI has consistently impressed us with their precision in manufacturing custom OEM components. From the intricate details to the overall quality, they have exceeded our expectations. The attention to detail in their production process ensures that each part meets our specifications, contributing to the success of our final products. It's not just about getting the job done; it's about getting it done right, and BOYI has consistently delivered on that front."

Ishita Malhotra

Supply Chain Director at Precision Dynamics

"Working with BOYI has been a game-changer for our production timelines. The team's commitment to delivering on time is unmatched. In the fast-paced world of OEM manufacturing, meeting deadlines is crucial, and BOYI has proven time and again that they not only understand the urgency but also have the capability to deliver high-quality custom components within the specified timeframes. Their reliability is a key factor in our continued partnership."

Kylo James

Engineering Manager at TechInnovate Corp

"BOYI stands out as more than just a supplier; they are collaborative problem solvers. In the course of our projects, challenges inevitably arise, and BOYI has consistently demonstrated a proactive approach in finding solutions. Their engineering team engages with ours, providing valuable insights and recommendations to optimize designs for manufacturability. This collaborative spirit has not only streamlined our production processes but has also strengthened our product offerings."

Ella Perez

Procurement Manager at NexGen Innovations

"BOYI has been instrumental in our cost-effective OEM customization journey. Their ability to provide tailored solutions without compromising quality has significantly impacted our bottom line. The transparent communication regarding costs and the flexibility in adapting to our evolving needs have made them a trusted partner. BOYI doesn't just offer manufacturing services; they offer a strategic partnership that adds value to our entire product development lifecycle."

Elsie Ross

R&D Lead at InnovateTech Solutions

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