Round Adjustable Split Dies

WESTport manufactures Special Round Adjustable Dies for producing, repairing, and restoring precision external threads across a wide variety of industrial applications. Designed with a split adjustable construction, these dies allow the thread size to be fine-tuned for optimum fit, making them an excellent choice for both new thread production and thread restoration. The adjustable design provides greater flexibility than solid dies by allowing slight expansion or contraction to compensate for wear, achieve specific thread tolerances, or optimize class of fit.

As part of WESTport's Special Dies product line, every Round Adjustable Die is manufactured to your exact specifications. Whether your application requires Unified (UNC, UNF, UNEF), Metric, ACME, left-hand, right-hand, or other specialty thread forms, WESTport can manufacture dies from your blueprint, engineering drawing, or sample part. Custom outside diameters, thread pitches, special tolerances, thread classes, and modified geometries are available to satisfy even the most demanding manufacturing requirements.

WESTport manufactures Special Round Adjustable Dies from premium High-Speed Steel (HSS) and other high-performance tool steels selected for outstanding wear resistance, dimensional stability, and long service life. Precision grinding produces sharp cutting edges and highly accurate thread profiles that consistently generate clean, repeatable external threads. Optional premium surface treatments and coatings are available to further improve wear resistance, reduce friction, and extend tool life when machining stainless steel, hardened alloys, and other difficult materials.

These adjustable dies are widely used throughout aerospace, automotive, defense, medical device manufacturing, hydraulic equipment, heavy machinery, energy production, industrial maintenance, and precision machine shops. Their versatility makes them equally effective for prototype work, production machining, thread chasing, repair operations, and replacement tooling. Whether threading shafts, studs, fasteners, fittings, or custom components, WESTport Special Round Adjustable Dies provide the precision and reliability demanded by today's manufacturers.

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

Benefits

• Produces highly accurate external threads
• Allows precise adjustment for optimum thread fit
• Excellent for new thread cutting and thread repair
• Compensates for normal tool wear
• Improves thread quality and dimensional consistency
• Long service life in demanding production environments
• Custom engineered for specialized applications
• Suitable for prototype and high-volume manufacturing

Typical Applications

• External thread cutting
• Thread repair and restoration
• Precision shafts
• Fasteners
• Studs
• Hydraulic fittings
• Industrial machinery
• Aerospace components
• Automotive manufacturing
• General machine shops

Technical Information

WESTport Special Round Adjustable Dies feature a split-body design that allows the die to be expanded or compressed slightly to achieve the desired thread fit. This adjustability improves flexibility for production machining, thread chasing, and repair applications while maintaining excellent dimensional accuracy. WESTport manufactures these dies in standard and custom thread forms, diameters, pitches, and tolerances to meet virtually any customer specification.

Why Choose WESTport?

For more than 35 years, WESTport has been a trusted supplier of precision thread gages, taps, dies, hardness testing equipment, metrology products, and ISO/IEC 17025 calibration services. Our experienced engineering team develops custom thread-cutting solutions that improve productivity, maximize tool life, and consistently produce precision threads for manufacturers worldwide. Whether you require a standard adjustable die or a completely custom threading solution, WESTport delivers the quality, technical expertise, and customer service manufacturers have trusted since 1989.