The Carmex Thread Turning Holder Standard (Left Hand, 350 mm OAL) is a purpose-built internal threading solution designed for precision, reliability, and deep-bore accessibility. Built to work with 27UIL inserts and U-Type interfaces, this holder delivers consistent performance in both CNC and manual turning applications.

• Left-handed internal threading orientation: Specifically configured for left-hand internal threads, ensuring accurate engagement and reliable tool control.
• 350 mm Overall Length (OAL): Long reach to access deeper bores and cavities without repositioning the setup.
• Shank Size: 50 mm, providing a sturdy, rigid connection to the machine tool for stable threading operations.
• 27UIL insert compatibility: Designed to accommodate 27UIL inserts for dependable cutting geometry and consistent thread quality.
• U-Type holder design: Engineered to pair securely with U-Type inserts, delivering precise alignment and repeatable results.
• 1.5° helix angle: Optimizes chip evacuation and reduces cutting forces for smoother threading and longer insert life.
• Screw clamp threading bar system: Secure, quick-change toolholding that minimizes setup time and maintains solid rigidity during operation.

Ideal for shops that routinely produce internal threads in deep bores, valve housings, hydraulic components, and other draw-tight assemblies, this holder combines predictable performance with practical versatility. The left-hand configuration, substantial reach, and reliable U-Type/27UIL interface help you achieve clean, accurate threads while reducing cycle times and tool wear. Whether you’re setting up a production run or performing a precision repair, the Carmex Thread Turning Holder Standard is designed to deliver consistent results with minimal fuss.