General: Chipboard screws, also called speed screws, are developed to prevent the problems arising with the application of the convetional wood screws in chipboard and different type of wood.
Properties: The benefits are achieved by the following properties. adapted geometry of the thread, the thread angle of the wood thread has been diminished from 60° to 40°.
Advantages: With the same major diameter the minor diameter is smaller and of equal thickness over the full screw length (except the point). The normal length chipboard screws have thread, till just under the head. A sharp self centering point, through which easier start of drilling and less risk of wobbing. Expensive and time consuming pre-drilling is often unnecessary.
The sharper and deeper profile of the thread does not push aside the material, but cuts into it. Less risk of crumbling and splitting of small crosscut sides e.g. with the installation of door and window furniture. Besides this is a bitter grip (up to 35% higher pull-out values) and up to 40% lower installation torque.
Material: Chipboard screws are made of case hardened steel and surface hardened. They are stronger and more wear resistant than wood-screws, increasing the cutting performance and preventing damage during installation. A toughened core avoids breaking of screw head at bending.
Assembly: Chipboard screw are provided with a special corrosion resistant lubricant causing a decrease of the installation torque.