Carmex Carbide Tiny Tool - Boring Bar is a precision solid carbide bar designed for internal boring and light turning tasks. With a compact 4.1 mm minimum diameter, a 22 mm reach, and a true R0.1 nose radius, this small-diameter tool delivers accurate, controllable cuts in tight bores and confined spaces.

This tool line is designed for engineers, machinists, and hobbyists who need reliable performance from a compact boring bar that can also handle general turning. The BMK and BXC coating grades provide options to match your material and cutting conditions, delivering durable tool life and smooth finishes across a range of applications.

• Ultra-compact 4.1 mm bore with 22 mm reach: Allows precise internal boring in tight cavities while maintaining rigidity, with a 0.1 mm nose radius that helps produce a smooth, consistent surface finish.
• Two coating grades for versatile material handling: BMK offers sub-micron quality with a triple PVD coating for high heat resistance and smooth cutting; BXC TiN coating is optimized for low cutting speeds and broad stainless-steel compatibility (ISO P30-P50 / K25-K40).
• Solid carbide durability for reliable, long-lasting performance: The carbide core provides stiffness and wear resistance, enabling dependable results across materials and reducing downtime during production.

In practice, you’ll experience precise bore alignment, repeatable finishes, and fewer tool changes thanks to its robust carbide construction and purpose-built coatings. Whether you’re delivering tight internal features in stainless steels or performing general turning tasks, this tiny tool helps you work faster with predictable results and consistent quality.