Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 5.1mm Minimum Diameter x 15mm Reach x R0.05 (Left Hand)

The Carmex Carbide Tiny Tool Boring Bar is a compact, solid carbide cutting tool designed for precision internal bores and general turning on small parts. With a 5.1 mm minimum bore diameter, a 15 mm reach, and a left-hand cutting geometry, it delivers reliable performance in tight spaces while maintaining clean, consistent hole quality. Built around the K20 grade, this tool combines stiffness and wear resistance for dependable results across a range of materials.

As part of Carmex's carbide bar lineup, this tool supports coating options that optimize performance for different cutting conditions. The BXC TiN-coated grade is tailored for low cutting speeds and performs well with stainless steels, helping extend edge life and improve finish. The BMK sub-micron grade with advanced PVD triple coating delivers exceptional heat resistance and smooth cutting, making it suitable as a general-purpose choice across materials.

• Small-diameter bore capability: Enables precise internal features with a 5.1 mm minimum diameter and 15 mm reach, allowing accurate holes in tight spaces and reducing setup time.
• TiN-coated carbide for stainless steels: BXC-coated grade supports low-speed cutting and long edge life, improving reliability and surface finish when working with stainless steels.
• High-heat, smooth-cut performance: BMK sub-micron grade with triple PVD coating provides excellent heat resistance and a smoother cut across a wide range of materials, reducing chatter and downtime.

In practical use, this tiny boring bar helps you achieve consistent hole sizes and superior finishes in small-diameter features, even under longer production runs. Its solid K20 carbide core delivers durability, while the targeted coatings manage wear and heat for reliable, repeatable results. The left-hand geometry supports specific turning and boring setups, making it a versatile choice for precision work in automotive components, mold inserts, fittings, and other compact parts—improving workflow, reducing tool changes, and helping you hit tight tolerances with confidence.