Carmex Carbide Tiny Tool - Boring Bar in BMK Grade is a compact, precision tool designed for internal boring and small-diameter turning. With a 1 mm minimum diameter, 4 mm reach, and a left-hand configuration, it fits into tight cavities while delivering reliable, accuracy-driven cuts. This tiny carbide bar is ideal for engineers, machinists, hobbyists, and workshop professionals who need consistent results in small parts.

Two durable coating grades give you options for different materials and speeds: BXC TiN-coated BMK Grade for low cutting speeds and good stainless-steel performance, and BMK sub-micron grade with a triple PVD coating that delivers high heat resistance and smooth cutting, suitable for general-purpose use across materials.

• Ultra-compact 1 mm minimum diameter: Enables precise holes in tiny workpieces with minimal tool deflection, helping you maintain tight tolerances without sacrificing rigidity.
• 4 mm reach with R0.05 nose: Lets you reach deeper into bores while preserving surface finish and stable cuts, reducing rework.
• Coated carbide grades for versatility: Choose BXC TiN for stainless steels at low speeds or BMK for high-heat, general-purpose cutting across materials, delivering longer tool life and reliable performance.

This combination of small size, precise geometry, and advanced coatings translates into faster setups, fewer tool changes, and more consistent bore quality across a range of materials. Whether profiling tiny internal features or finishing deep cavities, this tool helps you complete jobs with confidence, improve workflow reliability, and achieve smoother, repeatable results in less time.