Designing Snap Fits and 3D Printed Hinges for CNC Machining( cad software for cnc machine Hedy)

  • Time:
  • Click:3
  • source:LONTL CNC Machining


CNC (Computer Numerical Control) machining is a widely used manufacturing process that utilizes computer technology to control machine tools. It allows for high precision and accuracy in producing complex parts and components. In this article, we will explore the design considerations for creating snap fits and 3D printed hinges using CNC machining.

Designing Snap Fits with CNC Machining:

Snap fit designs provide efficient assembly solutions by allowing components to be securely joined without the need for additional fasteners. The following steps guide the production of snap fits using CNC machining:

1. Material Selection:
Choosing the right material for snap fit designs is crucial. Consider factors like strength, flexibility, durability, and resistance to environmental conditions. Common materials include ABS, nylon, PETG, or PLA for 3D printing applications.

2. Design Iteration:
Utilize CAD software to create multiple iterations of your snap fit design. Evaluate different dimensions, features, and geometries to ensure proper functionality and optimal performance during assembly/disassembly cycles.

3. Wall Thickness:
Maintain uniform wall thickness throughout the snap fit component. Excessive variations in thickness can lead to weak points or deformation during stress application. Aim for consistent support while considering structural requirements.

4. Undercut Features:
Undercuts allow components to interlock, providing snap fit connections. While designing these features, consider CNC machining tolerances and limitations, ensuring achievable results during the manufacturing process.

5. Test Prototypes:
Before mass production, it is important to validate snap fit designs through prototyping. Rapid prototyping techniques such as 3D printing or CNC machining can help identify potential issues and make necessary adjustments before moving forward.

Designing 3D Printed Hinges with CNC Machining:

Hinges play a vital role in various applications, enabling smooth rotation and movement between two connected components. Utilizing CNC machining for 3D printed hinge production involves the following steps:

1. Material Selection:
Similar to snap fit designs, appropriate material selection is crucial. Consider factors such as load-bearing capacity, wear resistance, and environmental constraints when choosing materials like ABS, PLA, or nylon.

2. Hinge Geometry:
Design hinges with consideration of opening angles, rotational friction, and required flexibility. CAD modeling offers versatile options to create customized hinge geometries suitable for specific applications.

3. Reinforcement and Support Structures:
CNC machining can be used to add reinforcement ribs or support structures within the hinge design, enhancing its strength and stability. Account for suitable dimensions and positions of these features during the manufacturing process.

4. Lubrication Compatibility:
When designing a hinge, consider potential lubrication needs. This includes ensuring space for applying lubricants or accommodating bearings if necessary, optimizing long-term performance and minimizing wear.

5. Prototyping and Testing:
Create prototypes to validate the functional characteristics of your hinge design. Iterating through testing helps identify any design flaws and adjust accordingly before finalizing mass production plans.


The combination of CNC machining processes and additive manufacturing techniques, such as 3D printing, provides designers with powerful tools for creating intricate snap fits and hinges. By carefully considering material properties, geometry, tolerances, and functionality, engineers can optimize their designs and produce high-quality products that meet specific application requirements. The ability to prototype and test different iterations ensures reliability and durability. With continuous advancements in technology, CNC machining serves as an essential method for producing complex components effectively and accurately. CNC Milling CNC Machining