Carmex Carbide Tiny Tool - Boring Bar - MTR - BXC Grade - 8.1mm Minimum Diameter x 15mm Reach x R0.2 is a compact, solid carbide boring bar designed for precision hole-making in tight spaces. With an 8.1 mm minimum diameter, 15 mm reach, and a nose radius of R0.2, it delivers accurate results in confined bores while also handling general turning tasks.

This line offers two coating grades to match different materials and speeds: BXC TiN-coated carbide for lower cutting speeds and excellent stainless steel performance, and BMK sub-micron grade with advanced PVD triple coating for maximum heat resistance and smooth cutting. BXC is well-suited for ISO P30-P50 / K25-K40 stainless steels, while BMK provides enhanced performance for demanding applications and is described as general-purpose for all materials.

• Coating options for versatile performance: Choose BXC TiN for efficient cutting of stainless steels at lower speeds, or BMK’s advanced PVD triple coating for greater heat resistance and smoother cuts across a wider range of materials. This gives you the right tool for the job without swapping tools mid-project.
• Compact, precise geometry for tight bores: With an 8.1 mm minimum diameter, 15 mm reach, and a 0.2 mm nose radius, you can access confined cavities while maintaining hole size accuracy and steady cutting.
• Rugged carbide construction for long tool life: Solid carbide delivers high stiffness and wear resistance, supporting reliable performance in boring and turning tasks and helping reduce tool changes and rework over time.

This tiny boring bar is designed to improve precision and consistency across delicate and demanding projects. The combination of tailored coatings and a compact, rigid geometry helps you achieve clean finishes, stable tool life, and predictable results—whether you’re working with stainless steel or other challenging materials. The tool’s small footprint and proven carbide construction make it a dependable choice for professional shops and serious hobbyists alike.