The Carmex Polygon Swiss Line Insert is a robust, left-hand back-turning indexable insert designed for Swiss-type machines and automatic lathes, and it’s built to fit GB25LA30R10BLU holders for secure, reliable mounting. It enables high-volume, cost-efficient turning across external grooving, back turning, profiling, threading, parting, and general turning tasks, making it a versatile choice for shops that run both small batches and high-volume production.

• Grounded cutting edges: Deliver consistent geometry and smooth finishes on every pass, improving part quality and reducing rework.
• Indexable directly on the machine: Swap to a fresh edge in seconds without removing the tool holder, cutting setup time and downtime.
• Coated holders for abrasion resistance: Extend tool life in demanding Swiss-type operations and maintain predictable performance over many cycles.

Designed to simplify demanding turning tasks, this insert supports reliable, repeatable results from the first part to the last. It helps streamline workflows on Swiss-type machines by enabling quick edge changes, durable performance, and consistent finishes across back turning, profiling, threading, and general turning applications.