McMaster 2815A13 Jacobs Taper-Mount Keyed Drill Chuck, Number 3, for 0.04" to 1/2" Bit Shank Size, Model 14N

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.

Jacobs — Jacobs chucks are the most widely used drill chucks.

Ball Bearing — 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.

Heavy Duty — 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 bits cutting straight.