Tungsten carbide thread rolling dies are high-precision thread forming tools manufactured from high-performance tungsten carbide-cobalt (WC-Co) materials. They are widely used in cold forming processes for mass production of fasteners, screws, bolts, and other standard threaded parts. Compared with traditional high-speed steel (HSS) or alloy tool steel dies, tungsten carbide offers extremely high hardness, superior wear resistance, and significantly longer service life, making it the ideal choice for high-precision and high-efficiency thread production.

• Ultra-High Hardness & Wear Resistance - Hardness reaches HRA 88-92, far exceeding traditional tool steel (HRA 78-83), effectively resisting wear and deformation during cold extrusion. Ideal for processing difficult-to-machine materials such as stainless steel, alloy steel, and titanium alloy, reducing dimensional deviation caused by tool wear.
• Excellent Fatigue Strength & Compressive Resistance - Optimized cobalt content (typically 6%-15%) and tungsten carbide grain size ensure structural stability under high-frequency impact loads, resisting chipping or fracture. Supports extremely long continuous production runs (up to millions of parts per die), dramatically reducing downtime for tool changes.
• High-Precision Thread Forming - Precision grinding and post-treatment processes achieve blade profile tolerances as tight as ±0.002 mm, ensuring consistency of pitch diameter, major diameter, and flank angle. Optional surface coatings (TiCN, AlTiN, or DLC) further reduce friction coefficient, improve thread surface finish (Ra ≤0.2 μm), and prevent built-up edge.
• Superior Red Hardness - During high-speed cold heading or warm rolling, tungsten carbide maintains hardness up to 800°C, avoiding thermal softening failure.

• Fastener Manufacturing - Mass production of carbon/stainless steel screws, self-tapping screws, wood screws, and high-strength bolts.
• Automotive & Aerospace - Processing high-precision, high-fatigue-life threaded parts (e.g., engine bolts, wheel lug bolts).
• Medical Devices - Manufacturing micro bone screws and implant-grade threaded parts requiring burr-free and high-cleanliness surfaces.
• Electronics - Producing precision micro screws (e.g., internal fasteners for smartphones and laptops).

• Higher Efficiency - Rolling speed up to 30-60 m/min, 1.5-2 times faster than HSS tools.
• Lower Cost - Reduced cost per part, eliminating frequent die changes and re-sharpening.
• Consistent Quality - Go/No-Go gauge pass rate ≥99.8%, minimizing scrap loss.

We offer dies customized according to workpiece drawings (thread standards: Metric, Unified, British, NPT, etc.), double-sided or four-side reversible die designs for maximum utilization, and special coatings (e.g., TiSiN, DLC) upon request.

• Use with a sufficiently rigid thread rolling machine and ensure consistent blank diameter.
• Calibrate parallelism of the two dies before operation to avoid unilateral overload.
• Regularly clean chips from the die teeth to prevent surface damage.
• Not recommended for rolling welded parts or materials with hard surface scale.