How to use Brass Threaded Inserts for 3D Printing?

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How to use Brass Threaded Inserts for 3D Printing?
March 17, 2023

Threaded inserts are useful because they add long-lasting and powerful threads into 3D print. You can insert holes directly to 3D printed parts, but they wear down very fast. It is because thermoplastics are used in 3D printing, and they are soft. To enhance durability, brass threaded inserts are used. How are threaded inserts in 3D prints? Here, in this blog, we are explaining the use of brass threaded inserts.

But, first, let’s understand what threaded inserts are.

A threaded insert is nothing but a type of fastener element. It adds a threaded hole to an object. It is used for many purposes.

In the case of 3D printing, threaded inserts are added to make durable threads. Plastics are not durable, and they do not last long.  It is especially the case when parts are regularly get assembled and dissembled frequently. The solution is a threaded insert.

Brass is one of the most used materials for threaded inserts. Though other materials like aluminum and stainless steel are also used, Brass is preferred.

Aluminum inserts are beneficial because of their low weight. Stainless steel is better because it is corrosion-resistant. Brass is the cheapest option, and it has good properties that make the threads suitable for most applications.

How do threaded inserts work?

Threaded inserts come with ribs and they have edges on the outside. They are typically called knurling. The knurling allows the inserts to hold the plastic and makes it difficult for them to be twisted or pulled out. On the inside of the brass inserts there are durable threads.

Methods for installing threaded inserts in 3D prints

There are several methods that can be used to install threaded inserts in plastic. But all of them may not be relevant and useful.

For example, threads that are inserted ultrasonically are applicable in industrial equipment. Molded threaded inserts in plastic can’t be used in 3D printing.

Two important methods are heat-setting inserts and fitting threaded inserts.

Heat-setting inserts

Heat-setting involves melting the plastic that surrounds the insert so that it can be inserted properly. As the plastic cools, it reflows around the insert and forms a strong bond along with the knurling.

The only downside of this method is that it might get misaligned accidently while heat-setting.


They use high-frequency vibrations to generate friction and heat.

Press fittinginserts

They can be simply press-fit into 3D prints without heating. Since the plastic does not melt around knurling and gets firmed, the bond created here is weaker.

Venus Enterprise is one of the leading manufacturers, exporters & OEM suppliers of brass inserts in India. At Venus Enterprise, we manufacture and export precise industrial brass turned inserts which includes brass threaded inserts for plastic and wood. We are now leading as global brass inserts manufacturers and suppliers, home depot and brass inserts manufacturers with clients not only in India but also steadily growing as offshore industrial product providers and partners in regions like the USA, UK, Middle-east, Asia and countries in Europe.