Carmex Thread Turning Holder Standard - Internal - Left Hand is a precision tool holder built for internal threading tasks, designed to deliver stable, repeatable bore threads with a dedicated left-hand orientation.

• Left-hand internal threading holder: optimized for internal bore threading applications with a left-hand orientation, enabling smooth cutting progression in the bore direction.
• Internal threading compatibility: specifically engineered to support internal threading inserts for clean, accurate bore threads.
• Length and shank: 140 mm overall length (OAL) with a robust 16 mm shank for rigid, vibration-resistant performance on standard machines.
• Insert compatibility: designed to accept 11 IL inserts, providing reliable, secure engagement for a range of internal thread sizes.
• U-Type compatibility: engineered to pair with U-Type inserts, ensuring a secure fit and precise alignment during operation.
• Helix angle: features a 1.5° helix angle to optimize chip evacuation and reduce cutting forces for smoother threading operations.
• Screw clamp design: built with a secure screw-clamp mechanism to minimize tool movement and maintain consistent performance under load.

This holder is ideal for machining environments where durable, accurate internal threads are required in bores—such as hydraulic fittings, automotive components, or precision housings. The combination of a long reach, sturdy 16 mm shank, and 1.5° helix angle helps you achieve cleaner threads, better surface finish, and improved chip control, while the compatible inserts and U-Type integration simplify setup and maintenance in everyday production.