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Thread Rolling Dies

Cold Rolling Advantage: Unlike cutting tools (e.g., taps) that remove metal chips, thread rolling forms threads by reshaping the workpiece’s surface metal. This eliminates material waste (saving 10-15% of raw material) and speeds up processing—production rates are 3-5 times higher than cutting methods, suitable for high-volume manufacturing (e.g., automotive, construction fasteners).

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Description

main spefications

Application	Widely used in iron material before heat treatment, carbon steel, stainless steel, etc.
Material	SKD11,DC53, D2
Surface treatment	Nitride treatment
Standard of Threading size	Metric, U series, W series and so on.
Dimension	- Outer dia. : Max. 400mm - Width : Max. 300mm - Bore dia. : Max. 100mm - Thread pitch : Min. 0.25mm
Feed method	in-feed or through-feed
Thread type	PT/NPT/BSPT/UN/UNC/UNF/UNEF/metric

key features

1.High Production Efficiency & Material Savings
Cold Rolling Advantage: Unlike cutting tools (e.g., taps) that remove metal chips, thread rolling forms threads by reshaping the workpiece's surface metal. This eliminates material waste (saving 10-15% of raw material) and speeds up processing-production rates are 3-5 times higher than cutting methods, suitable for high-volume manufacturing (e.g., automotive, construction fasteners).
Continuous Operation: Dies can work continuously with automated thread rolling machines, minimizing downtime for tool changes or adjustments, further boosting throughput.

2.Superior Thread Quality & Mechanical Performance
Enhanced Thread Strength: The cold rolling process compresses and refines the workpiece's metal grain structure (instead of cutting it), increasing the thread's tensile strength and fatigue resistance by 20-30% compared to cut threads. This makes rolled threads ideal for load-bearing or high-stress applications (e.g., engineering machinery bolts).
Smooth Surface Finish: Rolled threads have a smoother surface (Ra 0.8-3.2 μm) with no burrs or chip marks, reducing friction during assembly and improving corrosion resistance (critical for outdoor or automotive fasteners). Dimensional Precision: Dies are manufactured with tight tolerances (e.g., ISO 4H/5g). When paired with calibrated rolling machines, they ensure consistent thread pitch, diameter, and profile across batches, meeting strict industry standards.

3.Long Tool Life & Cost-Effectiveness of thread rolling dies
Wear Resistance: Made from high-hardness materials (e.g., high-speed steel HSS, cemented carbide WC-Co), thread rolling dies resist wear even under high-pressure cold rolling. Carbide dies, in particular, have a service life 5-10 times longer than HSS cutting tools, reducing tool replacement frequency.
Low Maintenance: Dies require minimal sharpening (unlike cutting tools that need frequent regrinding) and have a stable working performance. This lowers maintenance costs and avoids production delays caused by tool reconditioning.

4.Versatility in Applications
Wide Workpiece Compatibility: Suitable for processing various ductile metals, including carbon steel, alloy steel, stainless steel, aluminum, and copper alloys-covering most common threaded fastener materials.
Flexible Thread Types: Can form standard threads (e.g., metric, UNC, UNF), coarse/fine threads, and even special-thread profiles (e.g., trapezoidal threads) by replacing dies with corresponding designs, adapting to diverse industry needs.

5. Stable & Reliable Operation
Uniform Force Distribution: The rolling process applies even pressure across the die-workpiece contact area, avoiding localized stress concentrations that could damage the workpiece or tool. This ensures stable production and reduces defective rates.
Adaptability to Automation: Designed to integrate with automated thread rolling lines (e.g., feeders, conveyors), supporting 24/7 continuous production and aligning with modern manufacturing's demand for automation and intelligence.