M16 x 2.0 Chasers - S20 Rake For 1" Coventry Type Diehead

Diehead thread chasers are precision‑ground cutting inserts designed for use in Coventry‑type dieheads, enabling fast, accurate, and repeatable thread production on lathes, threading machines, and automatic screw machines. Each set includes a matched group of four chasers engineered to cut complete, uniform threads in a single pass or through staged cutting, depending on the machine setup. These chasers are essential for efficient threading in high‑volume production, repair work, and general machining environments where consistency and reliability are critical. Manufactured from hardened, high‑grade tool steel, Coventry‑type chasers deliver long service life, excellent heat resistance, and the strength required for threading materials such as mild steel, stainless steel, alloys, brass, and plastics. They are available in a wide variety of thread forms — including UNF, UNC, metric fine, metric coarse, and BSPT — allowing machinists to match exact specifications for their applications. Various rake styles (such as AM5, S, S20, and B rake) are offered to optimise cutting performance across different materials and thread types, improving chip flow, surface finish, and tool stability. Chasers are sized specifically for their compatible diehead (½", ¾", or 1"), ensuring perfect seating, alignment, and dependable cutting accuracy. High‑quality brands like Namco produce chasers with precise geometry and consistent tolerances, making them suitable for both manual and automated threading operations. These chaser sets are indispensable for machinists seeking reliable, fast, and repeatable thread production with minimal adjustment and downtime.