Professional CNC Precision Machining Company & Manufacturer & Suppliers

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CNC precision machining technology has significantly improved the level of manufacturing, especially in the fields of aerospace, medical equipment and electronics. This technology can ensure the manufacturing of high-precision parts and meet complex design requirements. Through automated and intelligent production methods, we continue to produce high-quality products while ensuring strict quality control. The application of CNC technology has promoted the rapid development and technological innovation of these industries. They not only improve product quality and reliability, but also promote the development of innovative designs. The precision CNC services provided by Zuerst further strengthen this trend, providing efficient, precise and reliable machining solutions to various industries.

Precision CNC Machining Tolerances

	Typical Tolerance (mm)	Best Possible Tolerance (mm)	Notes
EDM (Electrical Discharge Machining)	±0.015	±0.005	Tolerance can be affected by electrode wear.
Grinding	±0.005	±0.001	Surface finish is typically smoother with grinding.
CNC Turning	±0.025	±0.010	Finish can impact tolerance.
CNC Milling	±0.025	±0.005	Precision can vary based on tool type and material.

Common post-processing for precision micromachining

Sanding and Polishing

Grinding and polishing are critical steps in precision machining and are designed to improve the surface quality of parts. Smooth grinding can effectively remove surface processing defects, such as burrs, machine marks and adhesive residues, making the surface of the part smoother, significantly reducing roughness, and presenting a smooth and uniform appearance.The high-polishing process further upgrades the surface treatment and is suitable for a variety of materials, including ordinary plastics, metals, and transparent acrylic and polycarbonate. This process is designed to achieve a mirror-like effect, not only achieving a precisely uniform flat surface but also giving the part a professional-grade gloss. For transparent materials, high polish can also significantly improve their optical clarity.
Different grits of sandpaper determine the surface finish after sanding:
After treatment with No. 600 sandpaper, the surface finish is approximately Ra 0.8 μm;
Upgrading to 1000 grit sandpaper, the smoothness can reach Ra 0.4 μm;
The surface finish after mirror polishing and transparent polishing can reach Ra 0.1-0.05 μm.

Machined Finish

The surface of machined parts will leave traces of cutting tool movement, which are inevitable during the machining process. Still, a machined surface is considered smooth because it is produced by precision machinery. Typically, such surfaces require only simple hand deburring after removal from the machine to achieve a certain degree of finish, allowing for fast delivery. The roughness range of standard machined surfaces is usually between Ra 3.2-1.6 μm, which is suitable for general industrial applications. If you have higher requirements for surface quality, you can choose smooth processing, and the roughness can be reduced to Ra 1.6-0.8 μm, which is suitable for occasions that have certain requirements for accuracy and appearance. Super-finishing further improves the surface quality, and the roughness can be controlled between Ra 0.8-0.2 μm. This processing method is mostly used for the production of parts with high-precision and high-performance requirements.

Hand Finishing

Hand finishing is carefully performed by our team of experts and covers every step of deburring, gluing, filling, modification, plug-in addition, pre-assembly, precise measurement and assembly. We focus on every engineering detail and design specification to ensure that all post-processing processes are completed in-house with high quality. At the same time, we are also able to provide customized finishing and assembly services based on the components provided by customers, including the precise fit and assembly of parts. During this process, we can often discover hidden potential problems in CAD design, and rely on our professional knowledge and experience to provide solutions to help customers successfully overcome challenges and successfully complete projects.

Blasting

Sandblasting is the use of high pressure to spray abrasives onto the surface of a workpiece to create a uniform matte surface, remove tool marks, change surface roughness or remove contaminants. The main process parameters include air pressure and glass bead size (usually from #80 to #220). This technology is widely used to improve product appearance, clean surfaces and improve surface properties.

Painting

Paint color: We use Pantone and RAL Classic systems to match personalized colors or samples, and support two-color and multi-color spray painting to create complex visual effects, just like 2K molding.
Paint finish: Available in matte, flat, semi-gloss, glossy and satin finishes, it can simulate a specific Mold-Tech texture or soft touch, close to the texture of injection molded parts and overmolding.
Functional coating: UV coating enhances UV resistance, protects the material surface, and improves durability, wear resistance and scratch resistance; EMI coating effectively shields electronic equipment from magnetic field interference.

Some of the main advantages of precision machining:

●High precision: Precision machining produces parts with extremely tight tolerances, ensuring each part meets strict dimensional requirements. This is particularly important in fields such as aerospace and medical equipment, where products often require extremely high precision to ensure safety and functionality.

●Increase production speed: Modern precision machining technology is often highly automated and can complete more work in less time than traditional machining methods. This helps speed up project progress and better responds to changes in market demand.

●Material versatility: Precision machining technology can be applied to a variety of materials, including metals, plastics and composites. This allows manufacturers to select the most suitable material based on the needs of a specific application, whether that is factors such as strength, weight or corrosion resistance.

●Complex geometric shapes: Advanced CNC machines can be used to create complex geometric shapes that are difficult to achieve with traditional manual processes. This is a very important capability for designing innovative products and components.

●Consistency: Precision machining ensures consistency in every part, even in mass production. This greatly reduces assembly problems and product quality issues caused by part differences.

●Reduce waste: Due to the high-precision control during precision machining, material waste can be effectively reduced. This not only helps save costs, but also has a positive impact on environmental protection.

To sum up, precision machining technology plays an important role in improving product quality, reducing costs, shortening production cycles, and promoting sustainable development.

Industries we serve

Automotive Prototyping & Manufacturing

Consumer Products Prototyping and Manufacturing

Industrial Machinery Prototyping & Manufacturing

How to Choose Finishing Service Options

Anodizing

Anodizing technology has the functionality and aesthetics of anti-corrosion, enhanced surface hardness and wear resistance. This technology is mainly divided into two major types:
Type II anodizing: designed to produce parts with smooth and uniform surfaces, strong corrosion resistance and certain wear resistance. This type offers diverse color options, achieved through dyes. Typical thicknesses vary for different color coatings: black is usually 12-18μm, clear 8-12μm, and colored 4-8μm.
Type III Anodizing (Hard Anodizing): Focused on functional applications, exhibiting excellent corrosion and wear resistance. However, color choices are limited, with only transparent or black available. Its coating thickness is significant, with a typical range of 30-125μm, making it ideal for applications with high performance requirements.

Metal Plating

Electroplating is the process of depositing a thin layer of another metal or metal alloy on the surface of a metal part to prevent corrosion, oxidation, or change in appearance. Common plated metals include tin, nickel, zinc (as in zinc plating), and chromium.

Vacuum Metalizing

Vacuum metallization is a physical vapor deposition (PVD) technology that deposits materials such as metals onto a substrate in a vacuum environment by evaporation or sputtering to form a thin film several microns thick. A commonly used metal is aluminum because of its low cost, good thermodynamic properties and high reflectivity. This technology is widely used in fields such as optics, electronics, decoration and machinery to improve the appearance and performance of materials.

Printing & Etching

Parts can be customized with text and logos, screen printing for large surfaces and multiple colors, pad printing for curved surfaces, and laser etching for precision and permanent marking of metals and plastics.

Powder Coating

Powder spraying is a surface treatment technology that sprays powder coating evenly onto the surface of a workpiece and uses the corona discharge phenomenon to adsorb the powder particles to the workpiece, which is then heated and solidified to form a strong, wear-resistant coating. Typical thicknesses of such coatings range from 50μm to 150μm. Powder coating not only provides good anti-corrosion and wear resistance, but also enables various colors and gloss levels to improve the appearance of the product.

Materials for CNC Machining Parts

Zuerst offers a wide variety of materials for custom CNC machining, plastic, and metal,

including but not limited to:

CNC Metals

Aluminum

Aluminum: Aluminum’s strength-to-weight ratio, affordability, and recyclability have made it widely used across industries worldwide.

Alloys: 6061-T6, 7075-T6, 2024, 5052, 6060, 5083, 2017, 6082

Finishing Options: Alodine, Anodizing Types II, III, III + PTFE, ENP, Media Blasting, Nickel Plating, Powder Coating, Tumble Polishing

Precision CNC Machining Tolerances

Some of the main advantages of precision machining:

Industries we serve

Materials for CNC Machining Parts

CNC Machining FAQs

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