The Carmex Carbide Tiny Tool - Boring Bar is a compact, solid carbide solution designed for precision boring and reliable general turning. With a 5.1 mm minimum diameter, a 30 mm reach, and a left-hand nose with an R0.1 radius, it delivers tight, consistent holes in confined spaces. This tool is ideal for engineers, machinists, and hobbyists who need precise results in small-diameter work.

Two coated grades give you material-specific performance for different jobs. The BXC grade features a PVD TiN coating optimized for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40), helping extend tool life and produce smoother finishes. The BMK grade uses a sub-micron structure with a triple PVD coating (ISO K10-K20) to deliver extremely high heat resistance and smooth cutting across a broad range of materials, making it a versatile option for tougher applications.

• PVD TiN coating on BXC grade for low-speed stainless steel cutting: Enhances wear resistance and delivers smoother finishes when working at lower speeds, helping you get repeatable hole quality on stainless steels.
• BMK sub-micron grade with triple PVD coating for high heat resistance: Maintains sharp cutting performance under demanding heat conditions and across many materials, promoting consistent results and longer tool life.
• Compact boring bar geometry: 5.1 mm Ø, 30 mm reach, R0.1 nose, Left Hand: Enables precise holes in tight spaces with stable entering and excellent chip control, reducing deflection and boosting finish quality.

This tiny tool translates to faster, more reliable setups in the shop: you can tackle fine boring and finishing work with confidence, switch between stainless and tougher materials without swapping tooling, and maintain smooth, repeatable results project after project. It supports efficient workflows, reduces downtime, and helps you achieve precise, high-quality holes in a wide range of applications.