The Carmex Thread Turning Holder Standard is a precision internal threading solution designed for shops that need reliable left‑hand threading reach. Built to deliver secure toolholding and consistent thread quality, it’s a practical choice for machinists working with tight tolerances and deep cavities.

• Left-hand internal threading holder: Specifically configured for left‑hand internal threads to ensure correct chirality and cutting dynamics.
• 170 mm overall length (OAL): Extended reach for deeper internal threads while preserving rigidity and control.
• Shank size 20: Robust 20 mm shank for stable engagement and reduced deflection during cutting.
• 16IL insert compatibility: Designed to accommodate 16IL inserts for versatile internal threading options.
• U-Type holder compatibility: Engineered to pair with U‑Type inserts for a secure, precise fit and reliable alignment.
• Screw clamp design: Positive clamping mechanism that ensures repeatable tool positioning and consistent results across jobs.
• 1.5° helix angle: Optimizes chip evacuation and lowers cutting forces for smoother, more efficient threading operations.

This holder is ideal for precision machinists and job shops that require dependable internal threading capabilities in challenging geometries. The combination of a long reach, compatible insert system, and a gentle helix angle helps reduce vibration, improve tool life, and deliver accurate internal threads in housings, connectors, and other deep or confined features. With its straightforward screw clamp and deliberate left‑hand orientation, it’s a practical, no‑nonsense solution for consistent internal threading performance.