Cone Dies

WESTport manufactures Cone Dies for precision external thread cutting in demanding production environments. Also commonly referred to as Acorn Dies, Spring Dies, or Taper Nose Dies, Cone Dies are designed for applications where threads must be produced close to a shoulder or obstruction while maintaining exceptional accuracy and surface finish. Their tapered nose configuration allows the die to project beyond the die holder, minimizing the distance between the cutting edges and the workpiece shoulder. This makes Cone Dies an excellent solution for precision machining operations where conventional round dies cannot provide sufficient access.

Every WESTport Cone Die is manufactured to customer specifications using premium High-Speed Steel (HSS) and other high-performance tool steels selected for exceptional wear resistance and long service life. Precision grinding ensures accurate thread geometry, sharp cutting edges, and consistent dimensional repeatability throughout extended production runs. Whether your application requires Unified, Metric, ACME, left-hand, right-hand, or another specialty thread form, WESTport can manufacture Cone Dies from customer drawings, blueprints, or sample parts.

Cone Dies are especially well suited for automatic screw machines, CNC lathes, Swiss-type machining centers, and dedicated production equipment where close-to-shoulder threading is required. Their unique geometry improves accessibility while maintaining cutting rigidity, allowing manufacturers to produce clean, accurate threads with excellent repeatability. WESTport also offers custom outside diameters, thread pitches, chamfer styles, hook angles, coatings, and other specialized design features to optimize machining performance for specific workpiece materials and production requirements.

Manufacturers across the aerospace, automotive, hydraulic, medical device, defense, industrial machinery, fastener, and energy industries rely on Cone Dies to produce precision external threads on shafts, fittings, adapters, connectors, and other critical components. Whether manufacturing prototype parts or supporting high-volume production, WESTport engineers each die to maximize productivity, improve thread quality, and extend tool life.

Since 1989, WESTport has supplied manufacturers throughout North America and around the world with precision thread gages, custom taps and dies, metrology equipment, hardness testing products, and ISO/IEC 17025 calibration services. Our commitment to engineering excellence, precision manufacturing, and responsive customer support has made WESTport a trusted source for custom thread-cutting solutions for more than 35 years.

Benefits

• Produces highly accurate external threads
• Allows threading closer to shoulders and obstructions
• Excellent dimensional consistency
• Improves production efficiency
• Long tool life
• Custom engineered for demanding applications
• Reliable performance in high-volume manufacturing
• Reduces secondary machining operations

Typical Applications

• Automatic screw machines
• CNC turning centers
• Swiss machining
• Precision shafts
• Hydraulic fittings
• Aerospace components
• Automotive components
• Medical device manufacturing
• Fastener production
• OEM manufacturing

Technical Information

Cone Dies feature a tapered nose that allows the cutting section to extend beyond the die holder, making them ideal for close-to-shoulder threading applications. WESTport manufactures Cone Dies in numerous thread forms, diameters, pitches, and custom configurations to meet customer requirements. Premium tool materials, precision grinding, and optional wear-resistant coatings provide exceptional thread accuracy, repeatability, and extended service life in demanding production environments.

Why Choose WESTport?

For more than 35 years, WESTport has been a trusted supplier of precision thread gages, custom taps, dies, metrology products, hardness testing equipment, and ISO/IEC 17025 calibration services. Our engineering expertise and precision manufacturing capabilities enable us to develop custom thread-cutting solutions that improve productivity, maximize tool life, and consistently produce precision threads. Whether you require prototype tooling or high-volume production quantities, WESTport delivers the quality, technical expertise, and customer support manufacturers have trusted since 1989.