The Carmex Thread Turning Holder Standard (Internal, Left Hand) is a precision tool designed for machinists who need reliable internal threading with a dedicated left-handed orientation. With a 200mm overall length and a 25 shank size, it offers solid reach and rigidity, paired with compatibility for U-Type inserts to deliver secure, repeatable threads.

• Left-Hand Internal Threading: Optimized for left-handed threading applications to match specific machining setups and requirements.
• 200mm OAL: Long reach that facilitates threading in deep or hard-to-reach bores without repositioning the workpiece.
• 25 Shank Size: Robust shank designed for stable performance under cutting loads and consistent alignment.
• 16IL Insert Compatibility: Geared to pair with 16IL inserts for precise geometry and reliable chip control.
• U-Type Holder Compatibility: Built to securely accommodate U-Type inserts, ensuring a snug, accurate fit.
• 1.5° Helix Angle: Optimizes chip evacuation and reduces cutting forces for smoother, more efficient internal threading.
• Carmex Screw Clamp Threading Bars (Internal): integrates with Carmex screw-clamp system to provide dependable holding power and quick setup for internal threading operations.

This holder is designed for professionals who perform internal thread work in pockets or blind holes, where depth and alignment matter. The combination of a precise 1.5° helix angle, secure U-Type insert seating, and a dedicated left-hand orientation helps deliver clean thread profiles, reduced tool wear, and greater process consistency across high-volume or precision-oriented machining tasks.