Carmex Carbide Tiny Tool - Boring Bar - MTR - BMK Grade - 4.1mm Minimum Diameter x 15mm Reach x R0.2

Meet the Carmex Carbide Tiny Tool, a compact, solid-carbide boring bar built for precision in tight spaces. With a 4.1 mm minimum diameter, a 15 mm reach, and an R0.2 nose, it delivers accurate small-diameter bores and clean finishing passes in compact parts. While designed primarily for boring, it also offers dependable performance on general turning tasks where a rigid, small-diameter tool is advantageous.

Two coating grades help you match material and cutting conditions. BMK Grade uses a sub-micron carbide with an advanced PVD triple coating for high heat resistance and smooth cutting. BXC Grade uses a PVD TiN coating optimized for low-speed cutting on stainless steels. This versatility makes it suitable for a wide range of materials and applications.

• Precision tiny bore capability: 4.1 mm minimum diameter, 15 mm reach, and R0.2 nose enable accurate, controlled boring in tight spaces and small parts.
• BMK Grade—high-heat, smooth cutting: Sub-micron carbide with advanced PVD triple coating provides excellent heat resistance and smooth cutting across materials (ISO K10-K20).
• BXC Grade—TiN-coated for stainless steels at low speeds: PVD TiN coating enables reliable wear resistance and finishes on stainless steels at low cutting speeds (ISO P30-P50 / K25-K40).

By combining a rigid carbide core with specialized coatings, the Carmex Tiny Tool delivers consistent results, reduces downtime, and extends tool life in challenging small-bore work. Its compact geometry improves access in tight cavities, while the coatings help maintain sharpness and surface finish even on tougher materials. Whether you’re building precision assemblies or carrying out routine finishing passes, this tiny boring bar helps you complete jobs faster with fewer tool changes and more predictable outcomes.