Carmex Carbide Tiny Tool - Boring Bar - MTR - TNX Grade - 4.1mm Minimum Diameter x 15mm Reach x R0.05

The Carmex Carbide Tiny Tool is a compact, solid carbide boring bar designed for precision internal work on small parts. With a 4.1 mm minimum diameter, 15 mm reach, and a nose radius of R0.05, it delivers clean, accurate holes in tight spaces. This versatile tool is ideal for engineers, machinists, and hobbyists who need reliable performance in restricted-access areas.

Primarily built for boring, it also handles general turning tasks, giving you flexibility in a single tool. The TNX-grade carbide core supports two coating options to match material and speed: BXC TiN coating for low-speed cutting on a wide range of stainless steels (ISO P30-P50 / K25-K40), and BMK with a sub-micron grade and advanced PVD triple coating for high heat resistance and smooth cutting (ISO K10-K20). These coatings help optimize efficiency and extend tool life across different materials.

• Ultra-compact boring geometry: 4.1 mm minimum diameter, 15 mm reach, and R0.05 nose radius enable precise internal features in tight pockets with consistent hole quality.
• Two coating options for versatile performance: BXC TiN supports low-speed cutting on stainless steels; BMK’s triple PVD coating delivers high heat resistance and smooth cutting across a broad material range.
• Solid carbide durability for long tool life: The rigid carbide construction provides wear resistance and stable performance over many cycles, reducing tool changes and rework.

This tiny, reliable boring bar helps you improve throughput, reduce downtime, and achieve repeatable results in small-diameter bore and general turning applications. Its precise geometry, durable carbide core, and coating options work together to deliver consistent finishes and dependable performance on a variety of materials.