Carmex Thread Turning Holder Standard for Internal threading delivers reliable, left-hand internal threading performance with a long reach designed for deep bore applications. Built for machinists and shops that demand precision and consistency, this holder integrates smoothly into standard setups and supports demanding threading tasks.

• Internal threading holder (Left-Hand): optimized for left-hand internal threads, ensuring correct cut direction and stable performance during deep bore work.
• 250 mm Overall Length (OAL): extended reach to access deeper holes without compromising rigidity or precision.
• Shank Size: 32 mm, compatible with common toolposts and tooling systems for quick setup.
• 27UIL Insert Compatibility: designed to secure 27UIL inserts for reliable engagement and consistent thread quality.
• U-Type Holder Design: specifically configured to mate with U-Type inserts, delivering a secure, precise fit in every operation.
• 1.5° Helix Angle: engineered to optimize chip evacuation and reduce cutting forces, promoting smoother threading and longer insert life.
• Screw Clamp Construction: robust clamping mechanism ensures the insert stays firmly in place during high-precision threading tasks.
• Durable, Purpose-Built Design: built to withstand repeated production use in metalworking environments while maintaining consistent performance.

This holder is ideal for deep internal threading in housings, sleeves, and bore applications where reliable left-handed threads are required. The combination of a long 250 mm reach, a secure 32 mm shank, and compatible 27UIL inserts makes it a practical choice for shops performing regular internal threading operations on CNC lathes or manual machines. The 1.5° helix angle supports efficient chip control and smoother cutting, helping minimize tool wear and maximize productive run times.