Carmex SR0025K21 is a dedicated long shank threading insert holder designed for carbide external and internal threading inserts. Built for CNC milling environments, it unlocks extended reach on long overhang threading tasks without sacrificing accuracy or reliability.

• Long overhang design: A purpose-built tool holder line for applications requiring extended reach in threading projects.
• Internal coolant bore: Integrated coolant channel helps flush chips, improve insert life, and maintain steady cutting performance.
• Maximum length: Supports substantial reach with an overall holder length up to 210 mm (6 inches) for versatile setups.
• Carbide insert compatibility: Optimized to hold carbide external and internal threading inserts for multi-tooth, high-efficiency cutting.
• Cost-efficient solution: More economical than taps and dies for long-threading tasks, while delivering reusable inserts and repeatable results.
• Machining method: Designed to work with CNC milling machines using helical interpolation programs to achieve precise thread milling.
• Model: SR0025K21

This holder is crafted to boost productivity in thread milling jobs by enabling higher cutting speeds with multi-tooth carbide inserts, while maintaining consistent thread quality. It’s especially valuable for shops tackling long, deep, or hard-to-reach threads where traditional tapping isn’t practical. When working with long overhangs, lightly reduce cutting speed and feed rate by 20–40%—the exact adjustment depends on workpiece material, thread pitch, and the degree of overhang—to preserve tool life and finish. Use the Carmex long shank threading insert holder to streamline setups, extend tool life, and achieve reliable, precise threads on CNC mills.