For drills I mostly use ER16 collets rather than a chuck. This gives better concentricity and additional Z-clearance compared to a chuck. Also cheaper than drill chucks. All common tap and clearance drills are in their own collets and are premeasured in the tool table. I also have a couple of Albrecht keyless chucks on Tormach JT? to TTS adapters. I originally purchased a completely unacceptable Jacobs style chuck from Tormach; perhaps their quality has improved.