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Have you ever been frustrated by breaking your CNC router bits? It happens to the best of us, but there's a simple trick to avoid it - the Rule of Thirds. Today, I’m breaking it down step-by-step to ensure you never have another broken bit again. 🎉 The Rule of Thirds is essential when chucking up your CNC router bits. First, visualize your bit divided into three zones: Green Zone (Top third): This is your sweet spot! Make sure your router bit is firmly inserted up to here to allow full feeds and speeds with minimal risk of breakage. Yellow Zone (Middle third): If you need more length, you can use this zone, but remember to slow down your feeds and speeds to reduce stress and avoid breaking the bit. Red Zone (Bottom third): Avoid this at all costs! Inserting your bit only to this point guarantees excessive stress and is a sure way to break it. Why is this crucial? When your CNC bit isn’t properly supported, it’s prone to breaking. To maintain optimal performance and lifespan, always aim to insert your bit up to the green zone. 🟢✅ IDC Woodcraft provides a handy router bit holding guide sticker with your orders, detailing this rule to keep you on track. Always remember, never butt your router bit all the way up inside the spindle. Uneven contact can break the bit even when properly inserted. For more pro tips to elevate your CNC projects, be sure to follow our page and visit idcwoodcraft.com. Let's keep those bits intact and those projects brilliant! Happy CNC-ing! 🌟✌️