The Carmex Thread Turning Holder is a precision internal threading solution built for machinists who demand consistent, accurate left-hand internal threads. Designed for long runtimes and tight bore applications, it pairs a robust 350 mm overall length with a secure 50 shank size and seamless compatibility with 33UIL inserts.

• Left-Hand Internal Threading Holder: optimized for left-handed internal threads, enabling efficient setup and reliable results in threaded bores.
• 350 mm Overall Length (OAL): provides extended reach for deeper cavities while maintaining rigidity and stability during cutting.
• 50 Shank Size: sturdy interface for secure clamping and consistent performance under demanding machining conditions.
• 33UIL Insert Compatibility: designed to work with 33UIL geometry for precise internal threading operations.
• U-Type Holder Compatibility: engineered to pair with U-Type inserts for flexible internal threading configurations.
• 1.5° Helix Angle: engineered to optimize chip evacuation and reduce cutting forces for smoother, more efficient threading.
• Screw Clamp Design: secure, quick-change clamping system that minimizes runout and simplifies insert changes.

This holder delivers tangible benefits in real-world threading work: cleaner internal threads, reduced tool chatter, and longer tool life thanks to improved chip flow and stable toolholding. It’s ideal for workshops and production environments where precision internal threading is a routine task—whether on CNC machines or manual setups—without sacrificing safety or alignment. The combination of left-hand compatibility, long reach, and reliable U-Type insert support makes it a focused, dependable choice for professionals who demand consistent results from every bore.