The Carmex Thread Turning Holder Standard for Internal threading is a precision tool designed for machinists who need reliable left‑hand internal threads with consistent results. Built for deep bore work, this 250 mm overall length holder pairs with a 16IL insert and a 32 shank size to deliver steady performance in demanding threading applications.

• Left-Hand internal threading configuration: specifically engineered for left‑hand threads to ensure correct engagement and predictable results.
• Internal threading capability: designed to form accurate internal threads while maintaining clear chip flow into the tool path.
• OAL (Overall Length) 250 mm: extended reach for deep bores without sacrificing rigidity or control.
• Shank Size 32: robust shank diameter that supports stable cutting and precise alignment during operations.
• Insert type 16IL: compatible with a 16IL insert for consistent thread geometry and repeatable performance.
• U-Type compatibility: the holder is designed to be compatible with U-Type inserts, ensuring a secure and precise fit.
• 1.5° helix angle: optimized for chip evacuation and reduced cutting forces, enabling smoother threading operations.
• Screw clamp design: secure screw clamp mechanism provides quick, reliable insert changes and dependable workholding.

Ideal for precision manufacturing, repair work, and high-cycle production where deep internal threads are required, this left‑hand internal threading holder offers a stable platform for consistent thread quality. The combination of extended reach, compatible insert system, and the 1.5° helix angle helps minimize chatter, improve surface finish, and extend insert life in challenging bore conditions. When paired with Carmex U-Type inserts, it delivers a cohesive threading solution that supports efficient setup, repeatable results, and dependable performance across a range of internal threading tasks.