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
Universally usable direct screwing system for all ductile metal materials
Direct screwing system with shortened forming zone suited for all ductile metal materials
Direct screwing system specifically for thin sheet metal applications
Direct screwing system for high-stress applications
