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Meet the No Chip-Out, No Tear-Out 1/4″ Down-Cut Ball Nose CNC Router Bit, your go-to tool for marble mazes, accent carvings, and smooth 3D detail work.
Engineered to outperform traditional up-cut ball nose bits, it virtually eliminates chip-out and tear-out, leaving you with flawless, professional-grade results right off your CNC router.
Made in the USA and coated with Zirconium Carbonitride (ZrCN), this precision bit delivers up to 4× longer life than uncoated carbide—cutting cooler, cleaner, and longer on every project.
The down-cut spiral flutes shear wood fibers downward instead of lifting them, giving you silky-smooth carve edges without chip-out or fuzzing.
Your projects come off the machine ready to finish—no tedious sanding required.
Perfect for marble mazes, deep contours, engraved text, or decorative reliefs where accuracy and surface perfection matter most.
High-performance ZrCN coating boosts durability and heat resistance, giving you 3–4× the lifespan of uncoated bits and consistent precision cuts.
Crafted to exacting standards to ensure balance, rigidity, and superior performance across hardwoods, softwoods, MDF, and composites.
Each bit includes a bonus marble maze CNC project file—complete with G-code, design files, and step-by-step instructions—plus a 3/16″ steel ball bearing to bring your project to life.
When clean edges, precision detail, and perfect finishes matter, this bit delivers.
From deep 3D carving to smooth contours, experience pro-level results without chip-out or sanding—just pure craftsmanship in every carve.
Every IDC Woodcraft router bit is made for creators who expect accuracy, pride, and perfection in every project.
Our bits are USA-made, precision-engineered, and tested by CNC professionals.
When you buy from IDC Woodcraft, you’re not just buying a bit—you’re joining a community committed to surpassing excellence.
Cut Diameter: 1/4″
Shank Diameter: 1/4″
Cut Style: Down-Cut Ball Nose
Material: Solid Carbide
Coating: ZrCN (Zirconium Carbonitride)
Key Benefit: No Chip-Out, No Tear-Out Finish
Included Bonus: Marble Maze File + 3/16″ Steel Ball
All IDC Woodcraft digital files are protected by copyright. Resale or distribution of the digital files is prohibited without express written permission from IDC Woodcraft LLC.
Upgrade your CNC carving game with the bit that cuts cleaner, lasts longer, and eliminates sanding!
SKU: BD-14
Item SKU: BD-14
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For Vectric, Fusion 360, Carbide Create and Carveo users, get the latest CNC router bit tool database by going to this page
For CNC’s with routers, refer to this PDF download feeds & speeds table
