The Carmex Carbide Tiny Tool - Boring Bar (MTR) is a precision solid carbide bar designed for tight bores and general turning tasks. With a 3.1 mm minimum diameter, 15 mm reach, and an R0.2 corner radius, it delivers stable cutting in confined spaces while preserving hole accuracy. This compact tooling is well-suited for engineers, machinists, hobbyists, and buyers who value reliable, versatile performance.

Two coated grades extend the tool's capabilities: BXC and BMK. BXC uses a PVD TiN coating for low-speed cutting and works well with stainless steels (ISO P30-P50 / K25-K40). BMK features a sub-micron structure with an advanced PVD triple coating for exceptional heat resistance and smooth cutting across a broad material range, making it a strong general-purpose option.

• Ultra-precise, compact geometry: The 3.1 mm minimum diameter, 15 mm reach, and R0.2 corner radius let you access tight bores and maintain dimensional control without sacrificing rigidity.
• PVD TiN coating for lower wear and stainless steel efficiency: BXC grade provides reduced wear and friction at lower cutting speeds, helping extend tool life and maintain surface quality when machining stainless steels (ISO P30-P50 / K25-K40).
• BMK grade for high-heat performance and durability: Sub-micron structure with advanced PVD triple coating delivers superior heat resistance and smooth cutting across many materials, supporting demanding jobs and consistent results.

Designed to deliver dependable results in real-world shop environments, this tiny boring bar supports precise bore finishes, minimizes downtime, and reduces tool changes by handling both boring and general turning tasks. The combination of compact geometry and dual coating options provides consistent performance, reliable tool life, and predictable results across materials. Use it for stainless steel work, fine-pocket boring, and routine turning jobs to improve throughput and finish quality.