Carmex Carbide Tiny Tool - Boring Bar - MTR - BMK Grade - 4.1mm Minimum Diameter x 10mm Reach x R0.2

The Carmex Carbide Tiny Tool is a solid carbide boring bar designed for precision in small-diameter internal work. With a 4.1 mm minimum diameter, 10 mm reach, and a nose radius of R0.2, it excels at tight bores and delicate finishing inside assemblies, molds, and fixtures.

Designed for versatility, this tool line offers two coating grades to match your material and speed needs. The BXC grade uses PVD TiN coating for low cutting speeds and performs well with a wide range of stainless steels (ISO P30-P50 / K25-K40). The BMK grade features a sub-micron, advanced PVD triple coating (ISO K10-K20) that delivers excellent heat resistance and a smooth cutting action. While optimized for boring, these bars also handle general turning, helping you complete jobs with minimal tool changes.

• Small-diameter, long-reach boring bar: Access tight bores and internal features with a 4.1 mm diameter and 10 mm reach, while maintaining a stable, precise cut thanks to a compact, rigid design.
• Two performance coatings for versatility: Choose BXC TiN for low-speed stainless work or BMK’s sub-micron, triple-coated surface for high-heat stability and smooth cutting across a broad range of materials.
• Designed for boring with broad turning capability: Primarily built for boring, yet suitable for general turning tasks to reduce tool changes and improve workflow in mixed operations.

This compact carbide tool helps you maintain tight tolerances, achieve consistent finishes, and shorten cycle times by enabling reliable internal machining and occasional turning in a single, versatile tool. Its coatings and precision geometry are designed to deliver dependable results across stainless steels and other materials, making it a practical choice for engineers, machinists, and hobbyists alike.