Carmex Carbide Tiny Tool - Boring Bar - MTL - TNX Grade - 3.1mm Minimum Diameter x 10mm Reach x R0.2 (Left Hand)

The Carmex Carbide Tiny Tool is a compact, solid carbide boring bar designed for precise internal work in tight spaces. It's ideal for machinists, toolmakers, engineers, and hobbyists who need reliable boring and light turning in small bores. With a 3.1 mm minimum diameter, 10 mm reach, and left-hand cutting geometry, this tool supports accurate starts and smooth finishes in confined interiors.

Designed to cover a range of boring and general turning tasks, this tool line offers coating options to match your material and speed needs. Choose BXC with a PVD TiN coat for efficient cutting at lower speeds and strong corrosion resistance with stainless steels (ISO P30-P50 / K25-K40). Or opt for BMK, a sub-micron grade with a third-generation PVD coating for exceptional heat resistance and exceptionally smooth cutting (ISO K10-K20). These coatings help extend tool life and maintain consistent performance across materials.

• Small-diameter, extended reach for tight bores: 3.1 mm minimum diameter and 10 mm reach let you access confined internal features while preserving rigidity and accuracy.
• Two coating options for versatile performance: BXC TiN coating delivers efficient cutting at low speeds and stainless steel compatibility; BMK triple-coated, sub-micron grade provides high heat resistance and smooth cutting for demanding materials.
• Left-hand geometry with precise corner radius: Left-hand cutting with a known R0.2 radius supports clean finishes in bored interiors and reduces finishing passes.

This tiny boring bar helps you complete small-diameter bores with tighter tolerances more consistently, reducing downtime from tool changes and rework. Its durable carbide construction, paired with purpose-built coatings, delivers reliable results across a broad range of materials—making it a dependable choice for production runs or specialized one-off jobs.