The Carmex Screw Clamp Thread Turning External Holder (Left Hand) is a precision tool accessory designed for external threading on lathes. Built for machinists who demand reliable rigidity and repeatable thread quality, it delivers consistent performance in left‑hand threading applications.

• Left-Hand Orientation: Specifically configured for left‑hand external thread turning to ensure correct cutting direction and straightforward setup.
• 170 mm Overall Length: Provides generous reach for long workpieces while maintaining stability and control during cutting.
• 32 x 32 mm Shank: Standard square shank for broad compatibility with common tool posts and adapters.
• 27UEL Insert Compatibility: Supports the 27UEL insert geometry for precise external threading.
• ER/EL Insert Compatibility: Accepts ER and EL inserts, enabling a range of threading profiles and finishes without changing holders.
• U-Type Insert Ready: Designed to accommodate U-Type inserts for optimized engagement and accuracy in external threading tasks.
• 1.5° Helix Angle: Helix angle facilitates efficient chip evacuation and smoother cutting, contributing to better surface finish and insert life.
• Screw Clamp Mechanism: Robust clamping lets you seat inserts securely and maintain alignment under load, reducing runout and tool chatter.
• Robust Construction: Built to endure demanding machining environments with steady rigidity and long-term reliability.

This holder is ideal for shops performing precise external threading on cylindrical parts, such as shafts and Bar stock, where consistent thread form, tight tolerances, and reliable insert seating are essential. The combination of versatile insert compatibility (ER/EL and U-Type), a durable screw‑clamp design, and a practical 170 mm reach helps reduce setup time, improve cycle efficiency, and deliver repeatable results across multiple jobs.