Carmex Thread Turning Holder Carbide with Through Coolant - Internal - Left Hand - 250mm OAL - 16IL Insert - 20 Shank Size

Engineered for precision internal threading, the Carmex Thread Turning Holder with Carbide Shank delivers rigid, dependable performance for left‑hand internal threads. With through coolant, a secure screw‑clamp connection, and a long 250 mm overall length, this holder supports consistent, high‑quality thread forms across a wide range of diameters.

• Left-Hand Internal Threading Holder: specifically configured for internal left‑hand threads, ensuring reliable engagement and accurate thread geometry.
• Carbide Shank: rigid carbide shank provides superior stiffness and wear resistance to maintain straightness and precision during demanding machining.
• Through Coolant Bore: integrated coolant passage delivers flushing and cooling directly to the cutting edge for better chip control and longer insert life.
• 250 mm Overall Length (OAL): extended reach supports machining in longer or recessed features while maintaining stability.
• 16 IL Insert Interface: compatible with 16‑insert location tooling for versatile internal threading applications.
• 20 mm Shank Size: robust shank diameter designed to withstand cutting forces and maintain alignment under load.
• Screw Clamp Connection: secure screw‑clamp mechanism minimizes insert movement, reducing runout and tool dislocation during operation.

This Carmex holder is ideal for machinists and shops performing internal threading on cylindrical parts, from small‑diameter fittings to larger housings. The carbide shank and through‑coolant design help maintain thread quality under heavier feeds and longer cycles, while the left‑hand configuration unlocks efficient production of reverse or complementary threads. Use cases include internal threads in hydraulic components, gearbox housings, and precision sleeves where consistent thread pitch and surface finish matter. For best results, pair with the matching 16 IL carbide inserts and maintain proper coolant setup to maximize tool life and finish.