The Carmex Carbide Tiny Tool Boring Bar is a compact, solid carbide tool designed for precise small-diameter boring and turning. With a 4.1 mm minimum diameter, a 22 mm reach, and a left-hand cutting geometry, it excels in tight bores and constrained workspaces where accuracy matters.

This tool line offers two coating options to match your material and cutting needs. BXC is a PVD TiN coated grade optimized for low cutting speeds and works well with a wide range of stainless steels (ISO P30-P50 / K25-K40). BMK is a sub-micron grade with an advanced PVD triple coating, delivering exceptionally high heat resistance for maximum performance and smooth cutting across general-purpose materials (ISO K10-K20).

• Compact, precision-ready boring bar: 4.1 mm minimum diameter, 22 mm reach, and left-hand geometry for clean entrances in tight bores and interference-free toolpaths.
• Two coating options tailored for material and speed: BXC TiN coating for low-speed stainless steel cutting; BMK with triple PVD coating for high heat resistance and smooth cutting across a broad range of materials.
• Left-hand corner radius for consistent finishes: R0.05 corner radius supports predictable cutting action and improved surface finish across boring and turning operations.

By combining a rigid carbide core with advanced coatings, this tiny boring bar delivers reliable performance in a compact form. It minimizes tool changes, extends tool life in demanding materials, and helps you achieve consistent hole quality and smooth finishes in both boring and turning tasks.