Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 3.1mm Minimum Diameter x 15mm Reach x R0.2 (Left Hand)

Carmex Carbide Tiny Tool - Boring Bar in MTL - K20 Grade is a compact, solid carbide bar designed for precise internal boring and light turning tasks. With a 3.1 mm minimum diameter, 15 mm reach, and an R0.2 nose radius in a left-hand configuration, it delivers stable, accurate cuts in tight bores and hard-to-reach features.

This tool family is built to perform across a range of materials, including stainless steels. The K20-grade carbide is paired with advanced PVD coatings to deliver durable wear resistance and consistent results. The line includes BXC TiN-coated options for low-speed stainless work and BMK sub-micron grade with triple PVD coating for high heat resistance and smooth cutting across materials.

• Ultra-compact carbide design: Provides a rigid, precise cutting edge in small-diameter bores (3.1 mm minimum) with a 15 mm reach, helping reduce tool deflection and improve finishing pass quality.
• PVD-coated performance for versatility: BXC TiN coatings deliver lower friction for stainless steels at lower speeds, while BMK triple coating offers high heat resistance for reliable cuts across a broad material range.
• Left-hand geometry with a fine nose: The R0.2 nose radius and left-hand orientation promote clean chip flow and improved surface finish in internal boring and light turning.

Whether you’re upgrading a shop’s internal boring capability or adding a compact tool for delicate finishing, this Carmex Tiny Tool gives you predictable results, longer tool life, and reduced downtime. Its precise geometry and durable coatings help you finish jobs more consistently, with fewer tool changes and more productive cycles—benefiting engineers, machinists, and hobbyists alike.