EXO drill bit EXO PRO Z carbide ball 2.3 mm

EXO PRO Z carbide ball 2.3 mm drill bit from EXO is a solid-carbide spherical (ball) cutter designed for precision drilling and fine contouring in harder materials. With a 2.3 mm diameter and a ball-shaped tip, this tool provides controlled material removal, tight radius profiling and accurate small-diameter hole production. It is intended for operations that require dimensional accuracy, resistance to wear and smooth cutting action on demanding substrates.

Advantages

The solid carbide construction delivers high rigidity and long tool life compared with high-speed steel alternatives. The ball geometry enables smooth corner radii, consistent hole entrance and exit, and reduced chipping when working on brittle or hardened surfaces. Its small 2.3 mm diameter supports detailed machining tasks and accurate micro-drilling applications while maintaining repeatable performance across multiple parts.

Suitable for

• Precision model making and prototyping
• PCB work and electronics drilling
• Fine contouring and 3D machining of small features
• Small-diameter hole production in metals, composites or plastics (as material and feed conditions allow)
• Tooling and mould finishing where tight radii are required

Key specifications

• Tip shape: ball (spherical) geometry
• Material: solid carbide
• Diameter: 2.3 mm
• Intended use: precision drilling, contouring, finishing
• Suitability: hard and brittle materials when used with appropriate speeds and feeds

How to use

Mount the EXO PRO Z 2.3 mm carbide ball drill bit securely in a compatible collet or chuck, ensuring proper runout and concentricity. Use appropriate spindle speeds and feed rates for carbide tooling and the specific workpiece material to avoid overheating or premature wear. For small-diameter ball cutters, employ light axial loads and steady feed to maintain surface finish and dimensional accuracy. Where applicable, use coolant or air blast to clear chips and control temperature, and check the tool after initial passes to verify dimensions and surface condition.

Usage recommendations

Use the bit for short engagement lengths and avoid heavy pecking cycles; prefer shallow passes for finishing and consider a pre-drilled pilot hole for through-holes in tougher materials. Regularly inspect the tip for wear or chipping and replace the tool when surface quality or dimensional tolerance degrades.