The Carmex Carbide Tiny Tool - Boring Bar is a compact, solid carbide cutting bar designed for precise internal boring and general turning on small-diameter workpieces. With a 10.1 mm minimum diameter, 35 mm reach, and an R0.2 corner, it delivers reliable performance in tight spaces for engineers, machinists, and hobbyists alike. The tool line offers two advanced coating grades to match material and speed: BXC TiN for low-speed cutting on stainless steels and BMK for high-heat, high-performance applications.

• TiN-coated for stainless steels at low speeds: The BXC grade uses a PVD TiN coating that reduces wear and enables stable cutting on a wide range of stainless steels (ISO P30-P50 / K25-K40), helping extend tool life and maintain a clean finish even when cutting at lower speeds.
• BMK sub-micron grade with triple PVD coating: This grade delivers extremely high heat resistance and smooth cutting for maximum performance, reducing downtime from dull edges and providing consistent finishes across demanding materials.
• Compact boring bar geometry for tight tolerances: With a 10.1 mm minimum diameter, 35 mm reach, and an R0.2 corner, it enables precise bore profiles in confined spaces and stable tool control for long cuts, minimizing chatter and improving surface quality.

This Tiny Tool delivers reliable, repeatable results that help you finish small-diameter bores quickly and to spec. The dual coating options let you tailor the tool to your material and speed needs, while the compact geometry expands your capabilities in crowded setups. Expect longer tool life, fewer tool changes, and steady performance across a range of jobs.