The Carmex Thread Turning Holder Standard for internal threading is a purpose-built solution for precise, reliable internal threads with a right-hand orientation. Designed for deep bore work, it pairs robust clamping with a clear path to accurate thread engagement.

• Right-Hand internal threading holder: Optimized for right-hand internal thread production, delivering consistent results in challenging bores.
• 300mm Overall Length (OAL): Extended reach to access deeper holes without repositioning the setup.
• 40 Shank Size: Compatible with standard machines and holders for secure, rigid mounting.
• 16IR Insert compatibility: Ready-to-use with a 16IR insert for efficient internal threading operations.
• U-Type holder compatibility: Designed to work with U-Type inserts for a secure, precise fit.
• 1.5° helix angle: Helix angle enhances chip evacuation and reduces cutting forces for smoother threading.
• Screw clamp design: Robust clamping keeps the insert stable under load, improving surface finish and tool life.
• Internal threading focus: Specifically engineered to deliver accurate internal threads with clean finishes.

This holder is ideal for machinists and shops performing internal threading in long or deep holes, where reach and stability matter. The combination of a long reach, precise fit with U-Type inserts, and a low-friction helix angle helps reduce chatter, extend tool life, and produce consistent thread quality across materials commonly encountered in mechanical assemblies and production runs.