The Carmex Carbide Tiny Tool Boring Bar is a compact, solid carbide tool designed for precise boring and versatile turning on small-diameter workpieces. It’s built for machinists, engineers, and hobbyists who demand dependable, repeatable results in tight bores, delivering clean finishes and consistent performance.

Engineered for versatility, this tool line offers two advanced coating options. BMK Grade features sub-micron carbide with an advanced PVD triple coating for excellent heat resistance and smooth cutting across materials. BXC Grade uses a PVD TiN coating optimized for low cutting speeds and work well with a wide range of stainless steels (ISO P30-P50 / K25-K40). This left-hand bar has a 6.1 mm minimum diameter, 40 mm reach, and an R0.2 corner radius, making it ideal for tight bore geometries.

• BMK Grade with triple PVD coating: Sub-micron carbide plus advanced coating provides superior heat resistance and smooth cutting, helping extend tool life and maintain consistent finishes across demanding materials.
• BXC Grade for stainless steels: TiN-coated design optimized for low cutting speeds, delivering reduced friction and reliable performance on stainless workpieces (ISO P30-P50 / K25-K40).
• Left-hand, tight-diameter boring geometry: 6.1 mm minimum diameter, 40 mm reach, and R0.2 corner radius offer precise, controlled cuts in confined spaces with a dependable cutting action.

This combination of coating technology, precise geometry, and compact size helps you finish holes cleanly, reduce tool changes, and maintain productive cycles. Whether you’re drilling tight bores in stainless steel or performing general turning, this tool is designed to deliver consistent results with confidence.