Custom Online CNC Machining Services
Online CNC machining service for rapid prototypes and production parts in metals or plastics. Get instant quotes today, and order your custom CNC machined parts at a better price.
- Rapid Prototyping
- Flexible Low-Volume Manufacturing
- Precision Parts with Tight Tolerances
- Fast Delivery – As Quick as 5 Days
Who are we
Kingsun is a high quality processor specializing in Precision CNC Milling and CNC Turning, Swiss Turning, 3D Printing and Rapid Prototyping, with particular excellence in the machining of precision components for the top automotive and medical sectors.With our state-of-the-art machine shop cnc,3D printing workshop and fabrication of sheet metal shop, we are committed to providing superior customized solutions to our customers.In terms of parts machining services, we are always pursuing technological innovations to ensure that our products have superior precision and quality.Kingsun has a reputation for outstanding service and reliable delivery, and we will do everything we can to help you turn your product ideas into real parts.
Our manufacturing capabilities
Kingsun is one of the most reliable rapid prototyping companies. We can turn your designs and ideas into real parts in just a few days.
CNC Milling Service
Kingsun offers custom CNC milling services using 5-axis machines, along with several 3- and 4-axis mills. We deliver precision CNC machining for complex metal and plastic parts with precision tolerances.
CNC Turning Service
Our CNC turning services use high-performance lathes, turning centers, and mill-turn machines to produce precision-machined cylindrical components, such as shafts, bushings, and worm gears. With live tooling, we enable multi-axis machining in a single setup.
EDM & Wire-Cut Service
Our precision Wire EDM (Electrical Discharge Machining) uses conductive wire—such as copper, graphite, or molybdenum—to cut complex shapes with tight tolerances, sharp corners, and intricate undercuts.
CNC Grinding Service
For ultra-flat surfaces and precise OD/ID tolerances down to ±0.0002″ (±0.005 mm), our CNC grinding capabilities ensure exceptional accuracy and surface finish.
Swiss Machining Service
Swiss machining efficiently produces complex, slender parts by moving both the tooling and workpiece, minimizing deformation compared to traditional CNC lathes.
CNC Routing Service
Our affordable CNC routing capabilities are ideal for cutting prototypes and parts made from soft materials such as EPS foam, EVA, and wood.
How to Work With Us
Upload a CAD File
Start by choosing your preferred manufacturing process, then upload your design file.
get quote
Next, configure project details like material, finishing option, and quantity, receive an accurate quote and DFM feedback, then place your order.
Parts Delivered!
Once production is complete and your parts pass quality inspections, they are shipped to you.
Why Choose Us
We strictly implement ISO quality standards and have received ISO 9001: 2015 certification. This means our production lines feature advanced technologies that give manufacturing precision and accuracy. With sophisticated measuring and testing equipment in house, we verify that all materials and parts will meet your specifications.
Instant Quoting
If your RFQ contains clear information, quotations are typically delivered in a few hours.
Industry Experience
Having carried out rapid prototyping and rapid manufacturing since 2010, our engineers have built up rich experience. We can handle all types of projects.
Massive Network
Our in-house facilities allow us to get your projects done fast. And thanks to our strong relationship with rapid manufacturing partners, our capacity is not limited.
30K+ Projects Delivered
Over 30K projects have been sent to our customers worldwide since we started in 2010, and we have received countless positive comments.
CNC Machining Finishes
We offer 10+ surface finish options for your CNC prototypes and full production parts. Our extensive options allow you to match finishes to your parts’ specific requirements and applications.
As machined
This finish leaves the surface directly from the CNC machine, providing a cost-effective option with visible tool marks.
Sanding & Polishing
This process smooths the surface by removing tool marks, resulting in a refined finish with varying levels of gloss and texture.
Powder coat
A durable, wear-resistant finish applied electrostatically and cured under heat, providing a uniform, protective coating in various colors.
Anodized
An electrochemical process that enhances surface durability, corrosion resistance, and appearance, available in various colors with a smooth or matte finish.
Tolerances for CNC Machining
With strict adherence to industry tolerances, our CNC machining services ensures consistent accuracy for all CNC machined parts, allowing each component to integrate perfectly.
| Sample IDProcess | HeaStandard Tolerance (Inches)ding 1 | Standard Tolerance (Millimeters) |
|---|---|---|
| 3-axis/5-axis CNC Milling | ±0.005" | ±0.13 mm |
| Screw Machining | ±0.005″ | ±0.13 mm |
| Engraving | Engraving | ±0.005″ |
| Router (Standard) | ±0.005" | ±0.13 mm |
| Router (Gasket Tools) | ±0.030" | ±0.762 mm |
| Rail Cutting | ±0.030″ | ±0.762 mm |
| Steel Rule Die Cutting | ±0.015" | ±0.381 mm |
| Surface Finish: | Our typical surface finish for CNC parts is 125 RA (3.2 μm), adjustable based on specific material and processing requirements. | |
| Variable Factors: | Actual achievable tolerances depend on part size, geometry, material type, and machining complexity. | |
FAQs
How do I confirm my design can be manufactured reliably?
Every successful production starts with a solid manufacturability review. Once you upload your CAD file, Kingsun’s platform instantly analyzes geometry, wall thickness, overhangs, and tolerance feasibility using built-in DFM algorithms. You’ll see direct on-screen feedback within seconds—highlighting any potential risk areas. For complex or high-precision projects, our engineers conduct a manual DFM within one business day, offering clear, data-driven suggestions on design adjustments, process routes, or material choices. By reviewing manufacturability early, you eliminate rework, shorten lead time, and ensure your part can move straight from design to production with full confidence.Now upload your CAD file to receive instant feedback or request a manual “Engineer Review.”
How fast can Rapiddirect deliver?
Lead time depends on part complexity, quantity, and selected process. Kingsun (CNC/3D printing) can ship within 3–5 days, while injection molding and low-volume production usually take 2–4 weeks. For a precise timeline, please submit your 3D/2D drawings, material, and quantity—our system will instantly estimate your lead time during quoting.
What surface finishes and colors are available?
Kingsun provides extensive finishing options for both metal and plastic parts, including anodizing, powder coating, painting, electroplating, brushing, bead blasting, and polishing. Custom colors can be achieved through pre-colored resins or post-finishing with RAL or Pantone references. We also support color consistency verification and gloss level control to ensure visual uniformity across batches. You can explore finish types and examples on our Surface Finishing and Materials pages.
What if my parts do not meet the required specifications
At Kingsun, every product goes through strict verification—from trial production and inspection testing to customer confirmation—before shipment. Our quality assurance process ensures that all parts meet the agreed specifications before delivery, minimizing the risk of nonconformities. We take pride in our precision and reliability, and every shipment is the result of a joint confirmation between our engineers and customers.
Put your parts into
production today
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