The Carmex Polygon Swiss Line Insert - Grooving - Left Hand - GD25LW12T31BLU is a purpose‑built, indexable cutting insert designed for Swiss‑type and automatic lathes. It excels at external grooving, back/front turning, profiling, thread turning, parting, and general turning in high‑volume production environments. This left‑hand variant is optimized for setups where the cutting edge enters from the designated direction, helping you maintain consistent grooves and stable machining performance on compact Swiss machines.

With grounded cutting edges and a robust coating strategy, this tool delivers reliable performance in demanding turning tasks, producing smooth finishes and extending tool life between changes.

• Grounded Cutting Edges: Provides precise, stable cutting geometry for consistent groove dimensions and superior surface finish, reducing chatter and uneven wear over long production runs.
• Direct On‑Machine Indexing: Inserts can be indexed directly on the machine, minimizing downtime from tool changes and speeding up setups for high‑volume grooving and turning.
• Abrasion‑Resistant Coated Holders: Coatings enhance wear resistance and heat durability, delivering longer tool life and more reliable performance in challenging materials and tight tolerances.

This tool is built to streamline your Swiss‑machining workflow: it delivers repeatable grooves and profiles with fewer tool changes, supports faster setups, and helps maintain consistent part quality across long production runs. By combining rugged carbide geometry with efficient indexing and wear‑resistant coatings, it reduces downtime, lowers tooling costs, and boosts overall output without sacrificing accuracy or finish.