Thread Rolling — Precision Thread Forming for Reliable Fasteners
Thread rolling is the key finishing process after cold heading and before heat treatment for high-performance bolts and screws. Unlike thread cutting, it forms threads by extruding metal with rolling dies at room temperature. The metal grain structure remains continuous along the thread profile, greatly improving thread shear strength, wear resistance and fatigue life, which is critical for high-strength fasteners used in automotive, wind power and heavy machinery.
High-precision thread rolling machines ensure consistent thread pitch, major diameter and surface finish. Stable equipment performance helps avoid common defects such as damaged thread, crooked thread and incomplete tooth profile. Reliable rolling dies and proper speed adjustment are essential to keep high yield during long continuous production.
As fastener buyers raise stricter requirements on thread accuracy and anti-loosening performance, high-quality thread rolling equipment becomes a core investment for fastener manufacturers. Our thread rolling machines hold a large domestic market share in China, widely adopted by famous fastener enterprises, including Sunderland’s China factory. Combined with cold heading and heat treatment lines, the complete forming solution helps factories achieve stable quality and higher production efficiency.