ᐅ Which pre-drilled holes need to be considered when assembling IKEA BESTA units?

Hello everyone,

I am currently assembling my first IKEA BESTÅ furniture and want to make sure I pay close attention to all the important pre-drilled holes so that everything is stable and fits perfectly in the end. I’m especially interested in which holes are typically pre-drilled in the panels and which ones are absolutely essential for correct assembly.

I’d also like to know if there are any common pitfalls, like holes that could be confused or openings used for specific assembly steps that must not be overlooked.

Does anyone have experience with which pre-drilled holes are truly functional and important to ensure the BESTÅ system fits precisely and avoids stability issues?

I look forward to your detailed tips, including any advice on hole positions or recommended approaches for orientation.

Hello Sulebe,

First of all, great job addressing the issue of the pre-punched holes in the BESTÅ furniture – this is often an overlooked but important aspect for proper assembly.

Regarding your question: In IKEA BESTÅ, the pre-punched holes in the carcasses are usually intended for dowels, screws, and often for connectors (cam lock systems). There are the following key areas to consider:

- Holes on the carcass sides: For the dowels that connect the side panels to the bottom or top panel. These are often slightly smaller and located centered on the edges.

- Holes for the cam locks (cam nuts): Larger, usually pre-punched holes that you fit with metal or plastic sleeves. It's essential to ensure the correct position here, otherwise the connection becomes unstable.

- Holes on the back panel: Partially pre-punched, depending on the model. You should check if the back panel fits precisely, as this affects stability.

A common pitfall is confusing the holes for dowels and cam locks – these have different diameters and locations, and incorrect installation can prevent screws from tightening properly or cause the furniture to be misaligned.

The depth of the holes is also important: some are only half-punched through, so you must not drill through these, as it would weaken the structure.

Could you tell me which exact BESTÅ version you have? Sometimes there are slight differences between the newer modular systems and the older models.

In general, it’s also worth consulting the assembly instructions, where the holes are usually shown schematically.

For assembling IKEA BESTÅ, the drill holes for dowels and cam locks are especially important. Not every pre-punched hole needs to be used, but these two types must be carefully considered to achieve a stable connection. The back panel drill holes should also be checked, depending on the model.

Hello Sulebe, I completely understand that you want to know which pre-drilled holes on the BESTÅ units are really important – this especially helps with the modular furniture for better understanding and to avoid mistakes.

To clarify: the holes are mainly divided into three categories. First, there are the holes for the dowels, which you find on the carcass sides. These are usually round and slightly smaller. Then, there are the larger holes for the cam lock system – you can recognize these by their diameter of about 15 mm (0.6 inches) and the slightly recessed groove inside.

Additionally, there may be holes in the back panels depending on the specific submodel, either just as pre-punched holes or for securing with nails or screws. This is important because without the correct attachment of the back panel, the furniture will be unstable.

What has always helped me during assembly is to check the pre-drilled holes before putting the pieces together: sometimes they are present but not fully drilled through or covered with material residue, which can cause problems later on.

Have you already started assembling and can tell me which parts you are specifically unsure about? Then I might be able to assist you more precisely.

There are some important details to keep in mind when working with the pre-punched holes on this topic.

First of all, the pre-punched holes on BESTÅ are usually standardized to ensure easy and quick assembly. The most important holes are those used as connection points for cam locks and dowels. These need to be precisely made to achieve an optimal fit.

A commonly overlooked point is that the holes for cam locks often correspond with clearance holes in the adjoining panels. This means the alignment of these openings must be exact. Otherwise, the cam lock may not engage properly or may be difficult to turn.

Additionally, there are holes for mounting the back panel, which can vary depending on the model. In some versions, these holes are only partially punched and need to be drilled through, while in others they are already fully open.

My advice: if possible, compare the holes during assembly with the diagrams in the instructions and especially check reused panels for any enlarged or damaged holes. This could affect stability later on.

deoke schrieb:
Could you please tell me exactly which BESTÅ version you have? Sometimes there are small differences between the newer modular systems and the older versions.

Good question, thanks! I’m assembling the classic BESTÅ unit with two hinged doors and one shelf panel, which is about 120cm (47 inches) wide and 40cm (16 inches) deep. So, it’s a typical version, without soft-close doors, just the standard fronts.

During assembly, I noticed that some drill holes are only partially marked (half-punched), probably to allow flexibility depending on the needs.

Shawn38 schrieb:
What’s always helped me with my assemblies is to check the pre-punched drill holes before putting everything together: sometimes they are there but not fully through or are covered by material residues, which can cause problems later.

That matches my observation. So before screwing anything in, I want to make sure I identify these points correctly and check if I need to make additional drill holes during assembly.

Could you specify on which panels the cam lock holes are typically found and whether the dowel holes are always in the same positions? Also, I’d appreciate some details regarding the correct orientation (top/bottom).