The Carmex Carbide Tiny Tool Boring Bar is a compact, rigid solid carbide cutting tool designed for small-diameter bores and general turning tasks. Featuring a 6.1 mm minimum diameter, a 30 mm reach, and a cutting radius of R0.2, it excels in tight spaces where precision and surface finish matter. Built for engineers, shops, and hobbyists alike, this bar delivers dependable performance across a range of materials.

This tool line offers coating options that optimize performance for different work conditions. The BXC variant uses a PVD TiN coating, ideal for low cutting speeds and a broad set of stainless steels (ISO P30-P50 / K25-K40). The BMK variant is a sub-micron grade with an advanced PVD triple coating, delivering extremely high heat resistance for maximum performance and smooth cutting across materials (ISO K10-K20). Each option is designed to extend tool life while maintaining consistent, quality finishes.

• Compact bore size with 30 mm reach (6.1 mm min dia, R0.2): fits tight bores and deep cavities while delivering precise, consistent walls and smooth entry/exit in a single setup.
• Dual coating options for versatile materials: BXC TiN is optimized for stainless steels at low speeds, while BMK’s triple coating handles high-heat cutting across a wide material range, reducing wear and improving reliability.
• Rigid solid-carbide construction (MTR K20): delivers high rigidity and reduced deflection for stable cuts, long tool life, and repeatable finishes in demanding boring and turning tasks.

Designed to improve accuracy, extend tool life, and streamline setups, the Carmex Tiny Tool Boring Bar helps you achieve reliable bore quality and consistent results across stainless steels and other materials. Its compact geometry, durable carbide core, and coating choices work together to boost productivity, reduce downtime, and deliver professional finishes on every part.