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3ERP is an ISO 9001:2015 certified manufacturer providing high-quality CNC machining services for custom parts. Our in-house capabilities include 3-, 4-, and 5-axis CNC milling, as well as CNC turning, routing, EDM machining, drilling, and precision grinding. These processes are all capable of achieving tolerances down to ±0.01 mm.
Our machine shops can make any custom design. We specialize in rapid machining, prototype CNC machining, and both high- and low-volume manufacturing for engineers, product developers, and OEMs across various industries. Additionally, we provide a wide variety of surface finishes, including anodizing, powder coating, electroplating, and more, to enhance durability and aesthetic appeal for machined parts.
Whether you are a startup, an SME, or an OEM, 3ERP is your trusted partner for outsourcing CNC services. With experienced engineers and strict quality control, we ensure CNC parts meet your specifications. Submit your CAD files and drawings to receive a prompt quote.
We are always ready to handle complex CNC-machined parts with demanding specifications. Our advanced manufacturing capabilities support projects from initial prototypes through full-scale production with consistent quality and reliability.
Advanced inspection methods are used to verify critical dimensions, material composition, and part specifications. Our inspection capabilities include Hexagon CMMs, Olympus XRF analyzers, and precision measurement tools, with FAI reports available for projects requiring detailed validation.
Explore Our CNC Machining Quality Assurance Process
Whether you need rapid CNC prototypes, small-batch production, or end-use parts, 3ERP provides flexible machining solutions that adapt to your project needs.
Here are some of the CNC machining projects that we have done for our customers. And the happiness they would like to share when they receive the parts.
The uprights feature complex geometries with deep pockets and thin-walled sections. The key challenge was maintaining tight bearing bore tolerances (±0.01 mm) while preventing vibration and deformation during machining.
3ERP applied single-setup 5-axis CNC machining to complete all critical features in one clamping, eliminating re-fixturing errors.
Drilling, boring, and rigid tapping ensured accurate hole geometry and reliable threads, while in-process and final inspections verified all tolerances.
The wheel hubs required extreme concentricity, thin-wall strength, and deep internal machining, all under a tight motorsports schedule.
3ERP used CNC turning, custom 5-axis fixtures, and dynamic milling strategies to achieve micron-level accuracy, lightweight structures, and race-ready reliability.
Thanks to 3ERP’s 5-axis machining capabilities, we’re able to push the limits on our uprights and wheel package designs for maximum performance.
Tolerance of the deep cavity is +/-0.02mm, in the meantime, the roughness must be Ra0.1. The small channels are multiple directions, tight tolerance to ensure the rate of flow.
Use 5 axis milling machine to minimize the machining step. Special drilling tool for the 0.5mm holes. Reamer to achieve high gloss inner surface.
We received the cylinders yesterday. Our engineers have inspected them and assembled them with other components. All goes well. Thank you so much for such a great job. Please send our thanks to your projection team. We are planning to make 5 more pieces in a different design few days later. Will shot you an email when the design is ready. Have a nice day!
The geometry of this model is complex. Some of the joint lines are almost flat.
Our customer had this model made by 3D printing which is not as good as expected.
Use 5-axis CNC milling machine to get the diamond surface milled as fine as possible. So we can avoid sanding and polishing it directly after machining.
Hey folks, thank you very much for bringing our design into reality! We really appreciate that your team guided us to the right path. CNC machining is indeed a better way than 3D printing to make this model.
Explore our CNC parts gallery showcasing real customer projects and engineering samples.
3ERP machines over 60 engineering-grade metals and plastics to meet diverse industrial needs. Our capabilities include high-performance alloys like Aluminum 6061-T6 and 7075-T6, Stainless Steel 304 and 316L, and Titanium Ti-6Al-4V. For plastics, we work with PEEK, POM (Delrin), Nylon, and more. Each material is sourced with full traceability, and certifications are available upon request.
Additional finishes such as Brushing, Electropolishing, Black Oxide, and Zinc Plating are also available. Explore more options on our Surface Finishing Services.
Read our practical guide to optimize production efficiency. 3ERP experts offer immediate feedback to ensure optimal results in CNC machining, helping you consistently achieve precision tolerances. Following these best practices not only enhances precision and shortens lead time but also helps control your CNC machining service cost by reducing unnecessary complexity and rework.
CNC (Computer Numerical Control) machining is a precise and efficient manufacturing process that uses automated cutting tools to shape metal or plastic parts. Depending on part complexity, we use 3-axis, 4-axis, or 5-axis milling machines, lathes, or routers.
Once we receive your 3D CAD model, our skilled machinists program optimized tool paths to reduce costs and ensure tight tolerances. Learn more about the CNC machining process.
CNC machining is more cost-effective for simple parts. Complex geometries are possible but often require multi-axis setups, increasing time and cost. Tool access limits design flexibility, as cutting tool size and angle affect reach. High startup costs can raise per-part pricing for small batches. As a subtractive process, CNC also generates material waste. However, raw material blanks are typically cheaper than the powders used in additive manufacturing, helping offset waste-related costs.
CNC machining offers key advantages over 3D printing, injection molding, and laser cutting:
It’s fast and cost-effective for simple parts, like base plates with holes or grooves. CNC machines achieve tight tolerances of ±0.01 mm and deliver smooth surface finishes down to Ra 0.8—ideal for painting or anodizing. They also handle a wide range of part sizes, from large components up to 6 m x 30 m to tiny features cut with 0.05 mm tools on precision 5-axis mills.
Yes. As soon as we receive your RFQ, our engineers will review the CAD files and offer the design feedback and optimization suggestion for CNC machining if needed. In order to get better CNC machined parts quality and sort out the points to lower the CNC machining cost which affect the unit price.
3ERP is known as one of the best CNC machining companies in China in terms of quality, speed, and customer service. With high-quality CNC machines, we can easily achieve high-precision tolerances and standards of +/- 0.02mm and can even get within +/- 0.01mm. But keep in mind that it can have an impact on the cost.
