M4 CNC probe stylus 50mm carbide stem and 3mm ruby ball tip

This CNC probe stylus is a practical, shop-ready option when you need stable, repeatable probing without overcomplicating the setup. The carbide stem’s length is 50mm ,and with a 3mm ruby ball contact tip—an all-around combination that works well for everyday CNC probing, workpiece setup, and in-process inspection.

The carbide stem make this stylus performs so consistently. Compared with standard steel stems, carbide offers higher stiffness, and helps reduce bending and vibration when the probe contacts the part. It means cleaner trigger points, better repeatability, and more confidence when you’re checking critical features. It’s especially helpful when probing deeper pockets, tight bores, or areas where a longer reach can increase the chance of deflection.

At the contact point, ruby ball is built for durability and smooth surface contact. Ruby is highly wear-resistant and keeps its shape well over time, so you don’t have to worry about the tip wearing down quickly and throwing off your measurements. Beacuse the ball size make the balance: small enough to access many features, but still robust for regular shop-floor use.

This stylus is ideal for common tasks such as finding part zero, measuring bosses and holes, checking planar surfaces, and verifying features during machining. It’s a solid choice for general CNC machining, mold work, and precision components where repeatable probing matters. If you need a dependable stylus that holds up in production and helps keep your measurements consistent, this 50mm carbide + 3mm ruby combination is a reliable go-to.