Dowels in wood

Dowels in wood are not about wooden dowels, but the question of whether conventional dowels can also be used in wood. The following guide gives you all the important answers and tips on what to use instead of dowels.

When a wood screw goes crazy

It happens again and again that at the house on a construction a screw on a wooden part is not or no longer holds. Then, the do-it-yourselfer quickly wonders whether dowels can not be used here as well; for example, when the said old screw is turning over empty.

Possible dowels (according to fixing principle)

First of all, however, you must differentiate between two different fastening techniques for the dowels:

  • Dowels with a mechanical frictional connection
  • Dowels with a chemical adhesion

Detailed information is also available under types of dowels. First of all we want to discuss conventional dowels with mechanical frictional connection, for example the common plastic expansion dowels.

Conventional mechanically acting dowels in wood

Use of these dowels in wood is strongly discouraged. The same thing can happen, which happens with an otherwise typical substrate for dowels when a screw that is too large is screwed into the dowel: the mechanical pressure on the masonry can become so high that it blows up the masonry here.

There are tensions in the wood

This is also possible with conventional dowels in wood, if theoretically the correct dowel and screw size is used. The pressure on the wood is just too high. As a result, the borehole can start to crack here because the stresses in the wood become too high.

The use of chemical dowels in wood is better

Alternatively, you can certainly use chemical dowels. These are even quite good, since they only produce a chemical adhesion, but build up any pressure in the dowel hole. More about the injection, liquid or chemical dowels we have summarized for you under "Dowel cast in".

Tips & Tricks

Alternatively, you can fall back on a completely different technique, if you want to screw wood non-positively and without damage to the wood. This even gives you the opportunity to use screws with metric threads. We are talking about so-called wood screwed nuts according to DIN 7965, better known under the brand name and synonym Rampamuffen.

For a Rampamuffe a hole is drilled in the wood. On the outside there is a sharp thread that cuts itself into the wood. There are slots on the front to allow you to attach a screwdriver and turn the sleeve into the wood. Inside, the Rampamuffe then has a thread, as you need it.

Video Board: DIY Simple Dowel Jig