Coventry Dies & Dieheads

Genuine Coventry dieheads and Coventry dies have become a by-word for external threading. Originally developed by Alfred Herbert and sold world-wide, the Coventry diehead is probably used in more countries than any other system.

In 2001, Namco Tooling acquired the complete Genuine Coventry die range, thus completing the most extensive portfolio of threading tools in Europe.

Original manufacturing drawings and records, dating back over 60 years, are now exclusive to Namco Tooling, along with all the necessary plant and equipment to meet world demand. Thousands of sets of standard Coventry dies have been added to stock, and we now offer an unrivalled service on specials.

Existing Coventry diehead users should note that we offer the full range of lip grinds to suit most materials, including S-type, B-type, AM5, AM, S5, AS and M5.

S-20, B-33 and AM5 20 remain our most widely available Coventry chasers, but all other combinations of lip and throat can be supplied rapidly from our huge stocks of blanks and semi-finished chasers.

Coventry Dieheads can be used on turret lathes, CNC and automatic screw machines. The system is noted for its ease and simplicity in setting, and for the accuracy of cut over a wide range of thread variations. Automatic self-opening at the completion of each cut makes Coventry ideal for batch or continuous production work.