Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 4.1mm Minimum Diameter x 22mm Reach x R0.1

The Carmex Carbide Tiny Tool is a compact, solid carbide boring bar built for small-diameter holes and precise turning. With a 4.1 mm minimum diameter, a 22 mm reach, and a refined R0.1 nose radius, it maintains accuracy in tight spaces and yields clean, consistent finishes. This tool is ideal for engineers, machinists, and hobbyists who need dependable performance in restricted areas without sacrificing finish quality.

Designed for versatility, it supports two advanced coating options on a robust MTR K20-grade carbide core. BXC TiN coating targets low-speed cutting and stainless steels (ISO P30-P50 / K25-K40) for extended life, while BMK provides a sub-micron grade with triple PVD coatings for high heat resistance and smooth cutting across a broad range of materials.

• Two coating options for material-specific performance: BXC TiN is optimized for low-speed stainless steel work, while BMK’s sub-micron, triple-coated carbide delivers high heat resistance and smooth cutting across a wider material range, letting you tailor tooling to the job.
• Compact bore geometry for tight spaces: With a 4.1 mm minimum diameter, 22 mm reach, and a precise R0.1 nose, this tiny tool reaches confined bores and pockets while maintaining accurate depth control and clean edge finishes.
• Rigid carbide for durability and repeatable results: Solid carbide construction provides stiffness and wear resistance, enabling stable cutting, reduced chatter, and long tool life in boring and general turning tasks.

This tool helps you streamline your workflow by delivering precise, repeatable bore quality and smooth turning in challenging, restricted geometry. Expect longer tool life, fewer tool changes, and a more predictable cut when working with stainless steels and other demanding materials. Built for everyday shop use, it pairs well with standard holders and feeds, making small-diameter bore work more efficient and consistent.