The Carmex Carbide Tiny Tool—Boring Bar, MTR, TNX Grade—is a compact solid carbide bar built for precision boring and light turning in tight spaces. With a minimum diameter of 3.1 mm, a reach of 10 mm, and a nose radius of R0.05, it delivers accurate starts and clean holes even in confined bores.

• Tiny-diameter, long-reach geometry: Designed for precision work in restricted bores and hard-to-reach features, this bar maintains stable geometry and consistent hole quality across small-diameter applications.
• Coated options for versatility: Choose between BXC TiN coating for low cutting speeds and stainless steels (ISO P30–P50 / K25–K40) or BMK with a sub-micron, triple-coated finish for high heat resistance and smooth cutting across materials (ISO K10–K20).
• Solid carbide durability with TNX grade: The TNX-grade carbide delivers reliable wear resistance and stable cutting performance, reducing tool wear and supporting longer, more productive runs in demanding materials.

This tiny boring bar is built to enhance your workflow with dependable performance in both boring and general turning tasks. The combination of precise geometry, robust carbide material, and versatile coating options helps you achieve consistent hole quality, minimize downtime, and complete projects with greater confidence—whether in a shop floor setting, a production line, or a DIY workstation.