Threaded inserts are cylindrical metal components with a threaded interior that allows for the attachment of bolts, screws, or other threaded fasteners to connect one component to another. They are particularly useful in devices that require frequent disassembly and reassembly or when working with softer materials that may not provide sufficient strength for direct threading.

There are different types of threaded inserts available, each with its own unique characteristics and applications. One commonly used type is the helical insert, also known as a Heli-Coil. Helical inserts feature diamond-shaped cross-sections and are made from high-grade stainless steel wire. They mechanically roll into a thread shape similar to a spring, providing excellent strength and durability.

Benefits of Threaded Inserts

There are several benefits to using threaded inserts in CNC machined prototypes:

Strength and Durability: Threaded inserts provide enhanced strength and durability to the connection point, especially when working with softer materials like aluminum or plastic. They create a larger contact surface, making them stronger than the original thread.

Ease of Installation: Threaded inserts can be easily installed using the appropriate tools and techniques. They can be embedded into the larger part, and their external surfaces are designed to grip the material and resist loosening forces.

Versatility: Threaded inserts can be used at any point during production, even after coating or painting. They can also be used in applications that require frequent disassembly and reassembly, making them ideal for prototypes that undergo testing and iteration.

Repair and Maintenance: Threaded inserts can repair internally threaded holes that have been damaged, avoiding the need to dispose of entire components. They also provide better tightening performance and prevent further thread damage.

Factors to Consider

While threaded inserts offer many advantages, there are certain factors to consider before deciding to use them in CNC machined prototypes:

Cost: Threaded inserts can add to the overall cost of the prototype due to the price of the inserts themselves and the additional installation charges. It is important to evaluate the budget and determine if the benefits outweigh the cost.

Lead Time: The installation of threaded inserts can take additional time, especially in large-scale production. It is crucial to consider the lead time and how it may impact project timelines.

Material Compatibility: Threaded inserts may not be suitable for all materials. While they work well with softer materials, they may not provide sufficient strength for certain applications or materials. It is important to assess the compatibility of threaded inserts with the specific material being used.

Alternative Solutions: In some cases, alternative solutions like standard drilling and tapping may be more cost-effective and functional for CNC machined prototypes. It is essential to evaluate different fastening methods and choose the one that best meets the requirements of the project.

When to Use Threaded Inserts

Threaded inserts are best suited for CNC machined prototypes in the following scenarios:

Frequent Disassembly and Reassembly: If the prototype will undergo frequent disassembly and reassembly, threaded inserts provide a reliable and durable solution. They allow for easy removal and reinsertion of bolts or other threaded connections without damaging the components.

Soft Materials: When working with softer materials like aluminum or plastic, threaded inserts offer enhanced strength and durability. They prevent stripping or damaging of the threads, extending the lifespan of the prototype.

Applications Requiring Strength and Stability: Threaded inserts are ideal for applications that require strong and stable connections. They provide additional strength to load-bearing areas and prevent fastening devices from loosening, making them suitable for aerospace, defense, and other high-stress applications.

Repairing Damaged Threads: If the prototype has internally threaded holes that have been damaged, threaded inserts can be used to repair and restore the functionality of the threads. This avoids the need to scrap or replace entire components, saving time and resources.

Still have questions about CNC machining threaded inserts for prototypes? We’ll be happy to assist you.