Thread rolling forms threads by cold‑deforming steel, aluminum, or titanium with hardened dies. The chipless process creates strong, fatigue‑resistant threads for bolts, screws, studs, automotive and aerospace parts with high accuracy and production efficiency.
Thread rolling is a chipless cold‑forming process used to create external threads by plastically deforming material between hardened dies. Unlike cutting, rolling displaces material to form the thread profile, producing stronger surfaces with improved fatigue resistance due to work hardening and compressive residual stresses. The process is performed at room temperature on ductile materials such as carbon and alloy steels, stainless steels, aluminum, copper alloys, and titanium grades suited for cold deformation. Tooling includes flat dies, cylindrical dies, or planetary dies made from high‑speed steel and Cold Work Tool Steels or Cemented Carbide, engineered with precise thread geometry and surface treatments to endure high contact pressures. Proper lubrication, alignment, and feed settings ensure accurate pitch, flank angles, and surface finish. Thread rolling is widely used for fasteners, bolts, screws, studs, automotive drivetrain components, aerospace fittings, and medical implants, offering high production rates, excellent repeatability, and superior mechanical performance compared to cut threads.
BÖHLER K110 is a 12% ledeburitic chromium steel and corresponds to material number 1.2379 (X153CrMoV12, D2). This tool steel combines the advantages of conventional 12% ledeburitic chromium steels with those of advanced tool steels. In the group of 12% ledeburitic chromium steels, BÖHLER K110 offers the best combination of wear resistance, compressive strength and toughness, for which reason it is used in virtually all cold work applications. Its advantageous tempering behavior with a pronounced secondary hardness maximum also enables the use of advanced coatings. This also makes BÖHLER K110 suitable for complex tools requiring a high degree of dimensional stability and shape stability.
Read MoreBÖHLER K340 ECOSTAR belongs to the group of conventionally produced 8% chromium steels. Compared to conventional 12% chromium steels, this conventionally smelted tool steel has better toughness, hardening response and higher adhesive wear resistance. This combination of high adhesive wear resistance and toughness also offers advantages for industrial knives subject to high stress. This grade is also used for stamping and cutting tools.
Read MoreBÖHLER K390 MICROCLEAN is a high-alloyed, high-performance cold work tool steel manufactured using powder metallurgy. This material has the highest alloy content in the group of cold work tool steels with high vanadium content. The high alloy content gives this material outstanding wear resistance. At the same time, the powder metallurgical manufacturing process creates a uniform matrix with finely distributed primary carbides. Among other things, this leads to good material toughness. BÖHLER K390 MICROCLEAN is a problem solver for applications requiring extremely high wear resistance and compressive strength.
Read MoreBÖHLER K490 MICROCLEAN is a high-performance cold work tool steel with a balanced property profile, manufactured using powder metallurgy. This powder metallurgical tool steel offers an outstanding combination of high wear resistance, compressive strength, toughness and very good machinability. Thanks to the resulting flexibility, BÖHLER K490 MICROCLEAN is used in virtually all cold work applications, and in many cases this material is the first choice for newly developed tools. The commonly used hardening temperatures of BÖHLER K490 MICROCLEAN also enable shared heat treatment with popular cold work tool steels (1.2379, D2), making it very economical in terms of heat treatment.
Read MoreBÖHLER S500 – “The fireproof one” In the family of conventional high-speed steels, this alloy combines excellent cutting properties with very high hot hardness.
Read MoreFields marked with * are mandatory.