The Carmex Carbide Tiny Tool - Boring Bar (MTL) is a compact, solid carbide bar designed for internal boring and small-diameter turning. With a 5.1 mm minimum diameter, 15 mm reach, and a left-hand R0.2 corner, it fits into tight bores and delicate features while delivering precise, repeatable results.

This tool lives in Carmex’s carbide bar lineup and leverages advanced PVD coatings to optimize performance. The BXC Grade features a TiN coating for low cutting speeds and works well with a broad range of stainless steels (ISO P30–P50 / K25–K40). For maximum heat resistance and smooth cutting across materials, the BMK sub‑micron grade uses an advanced PVD triple coating (ISO K10–K20), offering versatility for general-purpose applications as materials vary.

• Compact geometry for tight bores: The 5.1 mm minimum diameter combined with a 15 mm reach lets you access confined internal features and complete precise boring without sacrificing stability.
• Left‑hand cutting with a precise R0.2 corner: The left-hand orientation and small corner radius promote stable engagement, smoother inserts, and cleaner finishes in tight tolerances.
• Coated carbide versatility for stainless and general materials: BXC TiN coating supports low-speed cutting on stainless steels, while BMK’s sub-micron, triple coating provides high heat resistance and smooth cutting for a broad material range.

Designed to improve workflow and reduce downtime, this tiny carbide boring bar delivers reliable, repeatable performance in internal boring and general turning. The solid carbide core provides stiffness and wear resistance, helping you achieve consistent finishes and longer tool life across demanding materials, with confidence in every pass.