Wire
Screws are made from steel or aluminum in wire coils. The wire is carefully chosen to match the design and application of the screw.
Heading: One-Die, Two-Punch
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 shapes the final head shape including a potential recess.
Spetsformning av självborrande skruv
Borrspetsen formas genom att två verktyg slås samman runt spetsen av det huvudförsedda ämnet och detta formar spetsen på ämnet till den önskade borrspetsen
Threading: Flat-die Rolling
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.
