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What is CNC milling?

CNC milling represents a machining process that seamlessly integrates computer numerical

control machining systems with multi-point cutting tools, often in the form of milling cutters.

As a pivotal branch of CNC machining, CNC milling entails securing the workpiece onto a machine

bed and methodically removing material from a solid block.

This meticulous process results in the fabrication of diverse products, encompassing materials

such as glass, metal, plastic, wood, and specialized materials.

This comprehensive guide delves into the mechanics of CNC milling machines, explores the

various categories of CNC milling machines, and furnishes valuable design insights to optimize

CNC manufacturing outcomes.

Product Details

The most commonly used materials in CNC milling are metals, such as aluminum, brass or steel

and plastics such as ABS, acrylic, polycarbonate, and polypropylene.

CNC Machining Tolerances

Tolerances are not standardized across all processes and materials.

The final tolerances on your part depend on various factors, such as part size, design complexity,

the number and size of features, materials used, surface finish, and the manufacturing process

employed.

Once your order is confirmed, we conduct a Design for Manufacturing review to identify areas that

may need modification for better manufacturability.

It's helpful if you can specify which areas in your design have critical tolerances that must be met

and which can be adjusted, if necessary, to optimize production time and cost.

Common Applications of CNC Milling Parts

CNC milling, renowned for its precision, finds widespread utility in crafting intricate designs.

It serves as a versatile method for producing various items including aerospace components,

furniture, medical parts, prototypes, titanium components, and woodworking projects.

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FAQ's

1. Advantages of CNC Milling

CNC milling offers numerous advantages compared to alternative manufacturing processes:

1. Ability to craft high-quality parts in nearly any shape or configuration.
2. Cost-effective machining suitable for prototyping and small production batches.
3. Achievable high dimensional tolerances, ensuring precision.
4. Smooth surface finishes can be consistently attained.
5. Reproducibility, allowing for the creation of identical parts repeatedly.
6. High-speed operations result in rapid part production.
7. Versatility to manufacture a wide range of part shapes and sizes with a single machine.
8. Applicability to various materials, including metals, plastics, and composites.
9. Easy programmability using computer-aided design (CAD) software, simplifying design creation

and modification processes.

2. Design Considerations for CNC Milling

When designing parts for CNC milling, consider the following guidelines:

1. Leverage Precision: CNC milling machines offer high precision, so take advantage of this

capability in your designs.

2. Avoid Deep Pockets: Deep pockets can be challenging to machine, so try to minimize their use.

3. Address Sharp Inside Corners: Sharp inside corners can pose machining difficulties, so consider

using radii to ease machining.

4. Apply Chamfers: Add chamfers to top edges to reduce sharpness, improve aesthetics, and

facilitate machining.

5. Implement Fillets: Apply fillets to the bottom of pockets to reduce the risk of stress fractures,

especially if the component will be subjected to stress.

6. Be Cautious with Thin Walls: Thin walls and delicate shapes may be challenging to machine,

as they might not withstand the cutting pressure.

7. Simplify Curves: When possible, design shapes that do not involve complex curves in multiple axes,

as they can be tricky to hold during machining processes.