Carmex Carbide Tiny Tool - Boring Bar - MTR - BMK Grade - 3.1mm Minimum Diameter x 15mm Reach x R0.05

The Carmex Carbide Tiny Tool is a precision micro-boring bar built from solid carbide, engineered for tight-diameter work and reliable performance in a compact form. Although designed primarily for boring applications, it also handles general turning tasks. It features a 3.1 mm minimum diameter, 15 mm reach, and a corner radius of R0.05, enabling clean, accurate holes in small or complex parts.

This tool is offered in two coating grades to match your material and speed needs: BXC, a PVD TiN-coated grade designed for low cutting speeds and proven compatibility with a wide range of stainless steels (ISO P30-P50 / K25-K40); and BMK, a sub-micron grade with an advanced PVD triple coating (ISO K10-K20) that delivers extremely high heat resistance and a smooth cutting operation. General purpose for all materials.

• Compact micro-boring geometry: Achieve precise holes with a 3.1 mm minimum diameter, 15 mm reach, and R0.05 corner radius, enabling accurate bores in tight spaces and reducing the need for secondary finishing.
• Coatings tuned for efficiency: BXC TiN coating provides reliable performance at low cutting speeds and excellent stainless steel compatibility, helping extend tool life and maintain consistent cuts.
• High-heat performance and smooth cutting: BMK sub-micron grade with triple PVD coating offers superior heat resistance and a smoother cut across materials, delivering reliable finishes and minimizing chatter.

In daily machining, this tiny tool translates to fewer tool changes, consistent bore quality, and versatile use across materials. The combination of small-diameter capability, durable carbide construction, and optimized coatings helps you complete precise boring and turning tasks more efficiently, whether you’re in a high-mix shop or tackling demanding micro-operations.