I need to use a step bit with a 1/2" shank. I only have drills with 3/8" chucks. Is the arbor size on most drills a standard which would enable me to just replace one of the 3/8" chucks with a 1/2" chuck? Is it really that simple?
Ok, I've done some research and it looks like a 1/2" chuck can be used on a 3/8" drill if the chuck is threaded 3/8"x24M. I was able to find a Jacobs MultiCraft (#30598) that should fit my mid-90s Makita.