wire threading

Wire threading:



SFAM is a leader in metal wire forming, our company deals with all wire threaded parts from the conception to the production. Our equipment is composed of many manually or automatically operated threaders. From the bended wire, many secondary operations can be made, on straight, 2D or 3D wires.


We are wired to your ideas!


Our know-how and high technology machinery makes it possible to thread metal wire in different diameters ranging from Ø 0.2 mm to 18 mm.
SFAM manufactures to your requirements convex, bended, folded, profiled wire.



Field applications:



Among the many features of these parts, here are some examples of the different types of wire parts we can provide:


  • Anchoring devices
  • Fixations
  • Threaded mounting brackets
  • Pestles
  • Sterns with a threaded end
  • Threaded hooks
  • Threaded hanging brackets
  • Threaded studs
  • Custom made threaded wires



Wire section and materials used:



We can use round metal wire sections for diameters going from Ø 0.2 to 18 mm.
Materials used include: 302 stainless steel – 316 food grade stainless steel – aluminium – stainless steel spring – copper – brass – aluminium/zinc – Carpal – Benzinal …
Other possibilities on demand …



Finishing and painting of metal parts:



We can ensure the finishing and painting of metal parts by our integrated epoxy and rilsan paint line : white zinc plating or zinc flake coating, powder coating, hot-dip galvanizing, chrome, electrolytic polishing, passivation…



Associated services:



  • Design and creation of tools + Checking fixtures
  • Unit control of the threading quality
  • Materials used: C9D mild steel wire – s235 steel wire – galvanized mild steel wire – stainless steel wire (430 stainless steel, 304 stainless steel)




Threading processes:


(ISO metric threads)

Threading by rolling


Economic and resistant the rolled wire is done by machines called “thread rolling machines”.
The wire is cold-formed between two sliding heads or rolling dies.
The tightening of the wheels on the furrowed wire makes it “swell”.



A Ø 7 mm wire will be rolled to M8
Threading by cylindrical rollers: the threading is done by the deformation of the part’s surface which leads two rollers having the shape of the threading print required. The two rollers, rotating are pushed towards each other until the desired shape is obtained.
Threading by rectilinear rollers: here the rollers have an infinite radius, this means they are straight and the movement in relation to each other leads the processed part to rotation. This technique of greater profitability is for hardware screws and nuts, with a lower accuracy. The cost of this threading process is half the price compared to thread die rolling.
The mechanical deformation has the advantage of reinforcing the threading and therefore giving a better mechanical resistance and a better fatigue and wear resistance.


Tangential thread cutting


Precise and flexible, the machined wire is obtained by “bar turning machines” or “automatic turning machines”, the movements are determined by digital control systems (CNC).
The parts manufactured by this technique are generally small sized (diameter 0.1 mm to 60 mm) and of high precision (from the thousandth to the hundredth of a millimeter). The wire is then processed by cutting tools.

A Ø 7 mm wire can be machined into M7 or M6 or M5 and all threading under 7mm.



Tip: Tangential thread cutting is cheaper because it’s quicker and needs less raw materials.