It is a phenomenon: Everything is prepared, selected the screw, the hole drilled big enough and lowered the range for the screw head. Nevertheless, the screw splits the material when it is screwed parallel to the surface.
Screw plate materials
Especially MDF column screws easily. Putting a clamp on, the material can not escape. Photos: Heiko Stumpe
Screw plate materials
There is a trick to prevent the column of fibers. Force parallel to the planned screw direction on both sides of an allowance on the surface of the workpiece. To prevent such a way that the pressed structure of the material is pressed by the screw to the outside. Gets the thread from the outside impression, it can cut into the material.
Turn the screw and carefully by hand one, because an electric screwdriver can quickly build up too much speed and therefore the screw drive deeper into the material than desired.
After the screws can be removed easily the ferrule again; everything stays in its place, without being split.
Alternatively, you can use a variable angle wood ferrule without allowances. She has over metal ferrules their wide surfaces on the top and bottom has the advantage that it does not leave marks on the surface of the plate.
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