The Carmex Carbide Tiny Tool Boring Bar is a compact, solid carbide cutting tool designed for micro boring and precision turning. With a 4.1 mm minimum diameter and 15 mm reach, it provides access to tight bores and detailed internal features in stainless steels and a broad range of materials. The left-hand cutting geometry and a small R0.1 tip promote smooth entry and clean, repeatable finishes on challenging borings. This model is part of Carmex’s line of tiny carbide bars, built for reliability in daily shop use.

• Compact micro-boring size: 4.1 mm minimum diameter with 15 mm reach lets you access tight bores and detailed internal features, reducing setups and boosting productivity.
• Coated carbide for longer tool life: BXC grade uses a PVD TiN coating optimized for low cutting speeds and stainless steels, while BMK offers sub-micron structure with a triple PVD coating for high heat resistance and smoother cuts, delivering fewer tool changes and more consistent finishes.
• Left-hand geometry with R0.1 radiused tip: The left-hand orientation and small-radius tip provide smooth entry, reduce rubbing and chatter, and help achieve cleaner holes and better surface finishes in boring passes.

Designed for engineers, machinists, and hobbyists who demand precise, repeatable boring results, the Carmex Tiny Tool combines a robust carbide core with advanced coatings to deliver reliable performance across a broad material range. The compact form fits common lathes and CNC setups, while the coatings and geometry reduce wear, extend tool life, and minimize downtime. Whether you’re optimizing stainless steel bores at low speeds with BXC or tackling mixed-material work with BMK’s high-heat resistance, this tiny boring bar helps you maintain tighter tolerances, finish quality, and overall workflow efficiency.