This lot of seven CAT40 heavy-duty drill chuck holders provides the rigid, high-torque grip needed for large-diameter drilling operations on CAT40 machining centers. Heavy-duty drill chucks are rated for larger drill shank sizes and higher thrust loads than standard Jacobs-style chucks, making them better suited for production drilling in harder materials or with large-diameter twist drills. Compared to ER collet holders used for drilling, dedicated heavy-duty drill chucks provide stronger radial and axial clamping force specifically designed for the thrust and torque loads encountered in hole-making — making them the preferred holder type when drilling consistency and drill retention are critical. MakeMixed ModelCAT40 Year2010 or older Product #16386 Price Please login to see price. Make an Offer Get a Quote Share Ask a Question About This Machine Seven CAT40 heavy-duty drill chuck holders — purpose-built for the kind of large-diameter hole work that collet chucks aren't rated for. When the job calls for serious drilling, these holders deliver the grip and rigidity to match. **All descriptions and specifications are preliminary and must be verified prior to purchase.** Live Tooling / Milling Specifications Spindle Second Spindle Tool Changer Turret Control Tailstock / Steadyrest Options Product Description: Heavy-Duty Drill Chuck Holders CAT40 Taper 7 Pieces