Meet the Carmex SR0027S30C—a single long carbide shank threading insert holder designed for CNC milling where extended reach is required for precise external and internal threading.

• Internal coolant bore: Through-tool coolant path delivers coolant directly to the insert, enhancing chip control and extending insert life.
• Long overhang optimization: Specifically engineered for applications that demand a long reach, providing stable performance on deep or awkward threads.
• Maximum length: Overall holder length up to 270 mm (metric versions) or 10.5 in (inch versions).
• Carbide inserts compatibility: Designed to accept indexable carbide threading inserts, leveraging multi-tooth inserts for higher cutting speeds and efficient material removal.
• Cost-efficient tooling: A practical alternative to taps and dies, with replaceable inserts that lower tooling costs over the life of a project.
• Operational guidance: When machining long overhangs, reduce cutting speed and feed rate by 20–40% depending on workpiece material, thread pitch, and the amount of overhang.
• Compatibility note: SR0390K12C cannot be used with conical inserts (12-18 NPT / 12-18 NPTF / 12-19 BSPT).

With its through-coolant design and robust carbide interface, this holder supports consistent thread profiles, smoother surface finishes, and reliable performance in production environments. It’s an ideal choice for shops performing high-volume threading on CNC mills where long reach and durable inserts matter—from precision hydraulic components to aerospace-type fasteners.