Roll Threading Experts: Precision Dies for ACME Threaded Bars & Threaded Rod

Roll threading isn’t just a manufacturing method — it’s the key to producing stronger, smoother, and more accurate threads. At Keystone Threaded Products, we have one of the largest inventories of thread rolling dies in North America, making us a trusted partner for high-performance ACME threaded bars, threaded rod, and custom thread solutions.

A Massive Inventory of Roll Threading Dies

Tooling dies are the heart of our precision rolled threading operation. These precision tools transfer the thread form onto metal using constant hydraulic pressure, producing stronger and more reliable components than traditional cut threads.

Our inventory includes over 1,000 roll threading dies, covering a wide range of thread profiles and diameters:

• ACME thread dies for heavy-duty threaded bars
• V-thread dies for standard threaded rod and bolts
• Combination dies for multi-start and specialty thread profiles

Our extensive tooling library allows us to handle both standard and custom jobs efficiently, thereby reducing lead times and ensuring repeatable accuracy.

Why Roll Threading Outperforms Cut Threading

When manufacturing ACME threaded bars and threaded rod, choosing roll threading over cut (aka machine) threading delivers major performance and cost benefits:

• Zero material waste: No chips, no scrap
• Longer product life: Work-hardened surfaces improve durability
• Superior surface finish: Produces smoother, more precise threads
• Higher strength: Cold working increases tensile strength by up to 30%
  
  

These advantages make roll threading ideal for demanding applications like screw jacks, lead screws, heavy-load assemblies, and structural components.

How Roll Threading Works

Our thread rolling machines apply constant hydraulic pressure to form the thread profile into the metal blank. The resulting threads are strong and uniform with exceptional dimensional accuracy.

• Roll threading forms the thread, it does not remove material.
• The cold-working process strengthens the metal and improves fatigue resistance.
• The resulting ACME threaded bars and threaded rods perform better under load than cut threads.

Strict Die Maintenance for Consistent Quality

High-quality roll threading starts with well-maintained dies. The roll threading experts and engineers at Keystone carefully rate, track, and service every die in our inventory to guarantee long tooling life and consistent threading results.

1. New Die Rating: All dies start at 100% capacity.
2. ERP Tracking: Ratings are logged to ensure traceability.
3. Post-Run Inspection: Each die is re-rated at 90%, 80%, or 70%.
4. Rework & Replacement: Worn dies are reconditioned or replaced to maintain our standards.

This process ensures every roll threading job, whether standard or custom, meets the same level of precision and strength.

Rolling Large-Diameter Threaded Rod

While many manufacturers stop at 4″ or even 6″ diameters, Keystone Threaded Products can roll thread up to 20” in diameter. That means we can manufacture large ACME threaded bars and heavy-duty threaded rod for applications where strength and scale are critical to final project performance.

• Largest die set: 15” diameter (moved with crane assistance)
• Thru-feed and infeed processes available
• Thread diameters from ¼” up to 20”

This capability makes Keystone the go-to source for industries like construction, infrastructure, transportation, and heavy machinery.

Custom Roll Threading Solutions

Need a non-standard thread form or diameter? Our team can produce custom dies to match your exact specifications. Whether it’s a unique ACME thread or a specialized lead screw, we have the tooling expertise to deliver.