There are several ways to join wood, mdf or chipboard. The quickest and easiest is to use screws and on many occasions it will be the preferred option.

But in others we may be interested in hiding the means used for this union, mainly for aesthetic reasons.

There are many ways to do this, here we are going to talk about some of them. Not all of these assemblies are completely hidden, some can be seen, but they can be done in places that will be hidden, for example, inside the furniture.

Pin tips or joints

mounting plates with dowels

This is perhaps the most common way of assembling slabs to build furniture. The process is simple and quick. In addition, for the DIY area there are hundreds of types of templates, guides or tools to improve process accuracy and speed.

The necessary tool is small, cheap and quite common. In essence, we will need a drill, drill and bushings (also called bushings or bushings). To prevent the joint from separating, some adhesives and / or screws are usually used. Here is a little guide.

Allows straight joints or 90-degree angles. Technically, it can also be used in more complex assemblies, but it depends a lot on the carpenter’s skill.

Mount with Cookies

hidden joints with cookies

The junction with cookies consists of fitting wafers or cookies, to which some type of glue has been applied, in grooves made for this purpose.

The result is durable and resistant, and the process is very simple with the right tools. In short, it consists of grooving with a cookie marker (practically all offer the adjustment of the necessary parameters such as depth or angle), apply the adhesive, insert the cookies and then join the pieces.

However, it does have some disadvantages. The necessary machinery, the cookie machine, is not economical and can only be used in this process. It is not a type of reversible assembly, you have to use stickers yes or yes. In addition, the process, although not complicated, is slow, as the drying times of the adhesive must be respected.

The assembly with cookies allows to make joints straight and at various angles. The latter is a great advantage of this type of assembly in relation to the others mentioned here.


joining chipboards with cams

When it comes to DIY at home, it is generally not the favorite option. Requires a lot of precision and tool change. In the industrial area it is different, this type of assembly is quite common, and we can find it in a multitude of furniture kits from major networks in the sector.

It is necessary to drill three holes, two the thickness of the screw and the other the width of the eccentric part, for which a drill similar to those used to open holes for cup hinges is used. This groove must perfectly fit the groove made on the edge of the plate.

Precision is required, as the three holes made in the plate must match, and also the length of the screw used and the dimensions of the eccentric part must be taken into account. There are models that greatly simplify the assembly, although they are not cheap or valid for all eccentric models.

On the other hand, the result is very practical. Both the assembly of the furniture and the disassembly are simple and the pieces are well fixed without the need for adhesives.

Its use is very limited to junction plates at 90 degree angles. Technically they can also be made in straight joints, but it makes no sense, since the eccentric would be seen.

Concealed screws and angled drilling

hidden screw assembly

They are a good option for the union of solid wood boards. My impression with cardboard and MDF is that the perforation weakens the board a lot and therefore the result can be fragile. This is my impression. Some manufacturers of this type of tool say it is okay, others are on the same line as me and others don’t even mention it.

The process is extremely simple and fast thanks to the models and guides available today. Basically, we adjust the thickness of the plate in the template, place and drill. It is a valid option not only for professionals, but also for those who are starting, as it does not require great precision and skill.

It is normal to use stickers, although it is not essential.

It is mainly used for straight and 90 degree angle joints.