How are screws manufactured?
Using great force, 3 fundamental cold forming processes transform wire into a head, drill point, and thread.
At ASTON SWEDEN we are specialists in cold forming of self-tapping and self-drilling screws in aluminum and stainless steel.
![ASTON wire for screw production sub_image](https://astonsweden.com/wp-content/uploads/2023/01/ASTON-wire-for-screw-production-sub_image.png)
Screws are made from stainless steel or aluminum wire coils. The wire is carefully chosen to match the design and application of the screw.
![ASTON screw heading machine head_image](https://astonsweden.com/wp-content/uploads/2023/01/ASTON-screw-heading-machine-head_image.jpg)
The wire is fed to the heading machine, which straightens and cuts the wire into a blank. The blank is then punched twice where the first punch partly shapes the head. The second punch forms the final head shape including a potential recess.
![ASTON screw drill point machine sub_image](https://astonsweden.com/wp-content/uploads/2023/01/ASTON-screw-drill-point-machine-sub_image.png)
The drill point is shaped by punching two dies closely together around the tip of the headed blank, deforming the tip of the blank into the desired drill point.
![ASTON screw threading machine sub_image](https://astonsweden.com/wp-content/uploads/2023/01/ASTON-screw-threading-machine-sub_image.png)
The threads on the screw are formed by rolling the screw between two flat-dies with the desired thread design, giving the screw its characteristic look, and getting rid of excess material from the pointing process.