The Carmex Carbide Tiny Tool is a compact, solid carbide boring bar built for precise internal work. With a 3.1 mm minimum diameter, 10 mm reach, and a left-hand configuration, it excels at creating accurate bores in tight spaces and can also handle lightweight turning tasks. This tiny bar delivers repeatable hole quality and dependable performance in demanding shop environments.

As part of Carmex's TNX Grade family, this tool supports two coating options to match your material and cutting speed. The BXC TiN-coated grade is optimized for low cutting speeds and works well with a wide range of stainless steels (ISO P30-P50 / K25-K40). The BMK sub-micron grade features an advanced PVD triple coating for exceptional heat resistance and smooth cutting, offering solid, general-purpose performance across materials.

• Ultra-compact boring bar geometry: Designed for tight internal bores with a 3.1 mm minimum diameter and 10 mm reach, plus a precise R0.05 nose radius for controlled cuts and smooth finishes in confined spaces.
• Dual coating options for material-specific performance: Choose BXC TiN for reliable, low-speed cutting in stainless steels, or BMK’s triple-coated sub-micron grade for high heat resistance and versatile, smooth cutting across materials.
• Solid carbide core for durability and consistency: A rigid carbide substrate provides stiffness and long tool life, delivering consistent hole quality and stable cutting under demanding conditions.

This tiny boring bar helps you complete precision bores quickly and confidently, reducing tool changes and downtime while delivering repeatable results across stainless steels and a broad range of materials. It’s a practical choice for engineers, machinists, and hobbyists who value accuracy, reliability, and efficient workflow in small-diameter operations.