Direct Screwing in Metals
In direct screwing, fasteners generate a thread without cutting during the screw-in process.
The principle of non-cutting forming used here produces a thread with high load-bearing capacity due to the uninterrupted grain flow and strain-hardening of the material. Additional screw locking (e.g. to DIN 267-27/28) is therefore unnecessary.
The generated thread is a metric ISO thread, which is compatible with standard parts. Furthermore, the threads formed in this way are free of play and are self-locking. Thread-forming screws can be used in all ductile, i.e. plastically deformable materials.
Benefits
- Cost advantages through the elimination of thread cutting and through direct use in cast, drilled or punched holes
- Produces an uninterrupted grain flow and a thread with high load-bearing capacity by strain-hardening of the material
- Through the forming process of the thread, no interfering chips are created
- The thread geometries of all our direct screwing systems have a large tolerance range preventing angular errors when the screw is applied
- No play between the screw and its self-formed nut threads
- No threadlocker is required due to the associated self-locking effect
- Repeat screwing is possible
b&m Brands
b&m-FORM S®
Direct screwing system with shortened forming zone suited for all ductile metal materials
b&m Innovation
b&m-TIGHT®
Direct screwing system with integrated sealing function for aluminum-steel hybrid applications
b&m Innovation
