The Carmex Carbide Tiny Tool Boring Bar (MTR) with TNX Grade is a compact solid carbide tool designed for precise boring and versatile turning in tight spaces. Featuring a 5.1 mm minimum diameter, 30 mm reach, and an R0.2 nose radius, it delivers consistent hole quality even in hard-to-reach bores.

This tool family offers two coating options to match your material and cutting strategy: BXC, a PVD TiN-coated grade optimized for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40); and BMK, a sub-micron grade with an advanced PVD triple coating that delivers extremely high heat resistance and smooth cutting across a broad range of materials.

• Low-friction TiN coating for stainless steels: BXC-grade coating reduces wear at lower speeds, helping you achieve cleaner finishes and longer tool life when machining stainless steels and related alloys.
• High-heat BMK triple-coated option: BMK-grade coating provides excellent heat resistance and smooth cutting, offering reliable performance across diverse materials and demanding cuts.
• Compact, long-reach geometry for tight bores: With a 5.1 mm minimum diameter, 30 mm reach, and an R0.2 nose radius, this boring bar accesses confined holes while maintaining precise guidance and stable cuts.

By choosing the Carmex Tiny Tool, you gain a dependable boring bar that supports efficient workflows, repeatable hole dimensions, and versatile performance from stainless steels to broader material families. Its precise geometry and purpose-built coatings help reduce tool changes and deliver consistent results, improving productivity on every boring and turning job.