CNC milled parts Manufacturers online

CNC milled parts are components in numerous industries that require maximum precision, repeat accuracy and flexibility in production.

CNC milling (Computerized Numerical Control) is an automated machining process in which computer-controlled milling machines process materials such as metal, plastic or wood with high precision.

Below you will find how CNC milling works, the types of CNC milling machines and the process steps for manufacturing CNC milled parts, the areas in which they are used and their advantages:

How CNC milling works:

CNC milling uses rotating cutting tools to remove material from a workpiece. The tools move along programmed axes, allowing complex geometries to be produced with a high degree of accuracy.

CNC milling machine types:

3-axis milling: Movement in X, Y and Z directions. The machines are ideal for simple geometries.

4-axis milling: These machines also have a rotating axis for more complex machining operations.

5-axis milling: These milling machines allow simultaneous machining at multiple angles. This is ideal for high-precision and complex components.

The process steps for manufacturing CNC milled parts:

1. CAD modeling: creation of a digital 3D model of the component.
2. CAM programming: Conversion of the CAD model into a CNC machining strategy.
3. Milling process: The CNC machine automatically removes the material.
4. Post-processing: Deburring, surface treatment or assembly of further components.

Use of CNC milled parts:

CNC milled components are used in many industries due to their high quality and versatility.

1. Automotive industry:
Engine and transmission components: Cylinder heads, crankshafts, housings.
Chassis components: Wheel carriers, steering parts, brake components.
Prototype construction: development of new vehicle parts with high precision.

2. Aerospace:
Lightweight components: structural components made of aluminum and titanium.
Turbine components: High-strength precision parts for engines.
Sensor and electronic housings: Protective housings for sensitive components.

3. Mechanical engineering:
Housings and brackets: Precisely milled components for machines and systems.
Toolmaking: Molds and fixtures for production.

4. Medical technology:
Implants: High-precision titanium components for the human body.
Surgical instruments: Special tools for operations.
Prostheses: CNC-manufactured fitting pieces for individual patient solutions.

5. Electronics and robotics industry:
Heat sinks: CNC-milled heat sinks for high-performance electronics.
Precision mechanics: Components for robot arms and precision mechanical devices.

6. Furniture and design industry:
Decorative components: Exclusive design components made of metal or wood.
Customized products: Customized brackets, connections and structures.

Advantages of CNC milling:

• High precision: Accuracy in the range of a few micrometers.
• Repeatability: Each component is manufactured identically.
• Flexibility: Adaptation of milling programs for different components.
• Machining of different materials: metals (aluminum, stainless steel, titanium), plastics, wood.
• Automation: Reduction of errors and increased efficiency.

CNC milled parts are indispensable for modern manufacturing processes and are used in a wide range of industries. Thanks to its high precision, flexibility and automation, CNC milling enables the production of complex components with high efficiency and quality.

Here you will find an overview of the most important criteria to look out for when purchasing CNC milling parts:

The purchase of CNC milled parts is crucial for the quality, efficiency and cost-effectiveness of production processes. A structured approach helps to optimize costs, ensure quality and minimize risks in the supply chain.

• The choice of the right material influences both the functionality and the cost of the CNC milled parts.
• Frequently used materials are:
• Aluminum (e.g. AlMg4.5Mn, AlSi10Mg): This material is lightweight, easy to machine and corrosion-resistant.
• Stainless steel (e.g. 1.4301, 1.4404): Stainless steel offers high strength and is corrosion resistant.
• Titanium is extremely light and stable and is suitable for aerospace and medical technology.
• Copper/brass: These materials have good conductivity. This makes them ideal for electronics and heat sink applications.
• POM (polyoxymethylene): This plastic is mechanically stable and has good sliding properties.
• PTFE (Teflon) is resistant to chemicals and extremely low-friction.
• PEEK: This material is resistant to high temperatures and extremely stable.
• Manufacturing tolerances must be defined according to functionality (according to DIN ISO 2768 or specific requirements).
• Precision requirements influence the costs - tight tolerances increase the machining effort.
• Depending on the application, different surface treatments may be required:
• Mechanical processing such as polishing, grinding and deburring.
• Coatings such as anodizing (aluminium), chrome plating or powder coating.
• Heat treatment for increased wear resistance
• Painting or printing for visual and functional improvements.
• It is best to check the dimensional accuracy using coordinate measuring machines (CMM) or optical measuring methods.
• Also carry out a hardness test according to Rockwell, Vickers or Brinell.
• A material analysis and a surface inspection, e.g. a roughness measurement in accordance with DIN EN ISO 4287, are also useful.
• Does the supplier have the usual certifications? ISO 9001 (quality management), ISO 13485 (medical technology), IATF 16949 (automotive), AS 9100 (aviation)
• Arrange for an initial sample inspection EMPB, PPAP according to VDA 2 or IATF 16949.
• Make clear agreements on rework and returns.
• Make sure you have a non-disclosure agreement (NDA) to protect intellectual property for exclusive designs.
• Make a comparison between suppliers: Send requests for quotations to several manufacturers (RFQ - Request for Quotation).
• Clarify the delivery times and whether the manufacturer is able to reliably meet them.
• Check whether the manufacturer can react flexibly to last-minute changes or urgent orders.
• Ensure compliance with environmental standards such as ISO 14001 or RoHS/REACH conformity.
• Choose suppliers with environmentally friendly production.
• Give preference to recyclable materials to reduce the carbon footprint.

Professional purchasing of CNC milled parts requires a detailed analysis of technical, economic and logistical factors. Close cooperation with qualified suppliers, a precise specification of requirements and a well thought-out cost strategy are essential for successful procurement.

CNC milled parts can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of CNC milled parts from all over the world can be found on Exportpages.