Carmex Carbide Threading Inserts in Whitworth (TiAlN Coated, code 12-19W) are a versatile, high-performance solution for machinists needing reliable Whitworth-thread cutting across a range of common profiles. Built for durability and precision, these inserts are designed to streamline threading work on lathes and milling machines.

• Length options: Five lengths spanning from 12 mm to 40 mm to fit different workpiece depths and profiles.
• Thread profiles: Coverage for all common thread forms, with Whitworth-focused compatibility for typical machining applications.
• Material and coating: Carbide inserts with TiAlN coating that enhances wear resistance and enables higher-speed cutting.
• Double‑sided cutting edges: Each insert provides two cutting edges for extended life (except for BSPT/NPT/NPTF/American Buttress/API RD profiles).
• Internal/external capability: For many thread profiles, the same insert can machine both internal and external threads (except ISO/UN/NPSM/UNJ/Acme).
• Pitch range compatibility: Depending on length, supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI).

Whether you’re setting up routine maintenance, producing small lots, or performing on-demand repairs, these inserts deliver consistent thread quality with predictable wear. The TiAlN coating helps maintain shape and surface finish under demanding speeds and feeds, while the dual-cutting-edge design minimizes downtime by letting you re‑index edges rather than swapping tools. With a compact selection covering multiple lengths and pitch combinations, you can tackle a wide range of Whitworth-thread components with a single, reliable insert set.