Secure bits into your drill press, milling machine, or lathe. These chucks are keyed, so they grip bits tightly to prevent slipping under heavy loads. Use the included key to tighten and loosen the jaws. Attach these chucks to your machine with a Jacobs taper arbor. To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.

Medium duty chucks work for most drilling jobs in metal, wood, and plastic. A one-piece sleeve keeps them rigid when drilling in hard materials, such as steel. For accuracy and longevity, they have hardened wear points and center-ground jaws that grip the bit evenly.

Heavy duty chucks give you the rigidity and heft needed for high-torque drilling in hardened metal. Their extra mass means they resist vibration and fluctuating cutting forces to keep your bit stable. While they share all of the same features as medium duty chucks—one-piece sleeve, center-ground jaws, and hardened wear points—they grip bits tighter and stay accurate longer under heavy loads. Chucks with ball bearings produce less friction for the best grip on bits. Use them for tight tolerance drilling to make accurate holes. They’re also known as super chucks.

Jacobs chucks are the most widely used drill chucks.