The Carmex Carbide Tiny Tool Boring Bar is a precision micro cutting tool designed for tight bores and small-diameter workpieces. It’s ideal for engineers, machinists, and hobbyists who need reliable boring accuracy and versatile turning on confined features. With a 2.1 mm minimum diameter, a 10 mm reach, and a zero nose radius (R0), it offers enhanced access and precise starts in restricted spaces.

This tool is part of Carmex’s carbide bar family, featuring a BXC grade with a PVD TiN coating optimized for low cutting speeds. It performs well with a wide range of stainless steels (ISO P30-P50 / K25-K40). The family also includes BMK variants with advanced PVD triple coatings for higher heat resistance and broad-material capability, giving you options based on your application needs.

• Ultra-compact diameter and 10 mm reach: Access tight bores and deep pockets with ease, maintaining stable guidance and precise hole sizes in restricted spaces.
• TiN-coated BXC grade for low-speed cutting: Delivers reliable wear resistance and smoother cutting when machining stainless steels, helping extend tool life at practical, controlled speeds.
• Zero-nose-radius carbide tip (R0): Provides clean starts and consistent cuts, reducing finishing passes and improving hole finish accuracy.

Using this tiny boring bar helps streamline setups, reduces tool changes, and delivers repeatable, high-quality results across common materials. Its compact, rigid carbide design supports dependable performance in small-diameter work, making it a trustworthy choice for precision machining workflows.