Using cordless drill

[9W Monighan]

Sounds like the chuck is mounted on a taper like most Jacobs chucks. The screw is just a way of keeping it up on the taper. All air drills (that don't reverse) are mounted on the 3/8''-24 RH thread. To remove you can buy a set of tapered shims from Jacobs to place between the housing and chuck to pop them off. I never fooled with any of the 14.4v Dewalts in my shop. The clutch gets worn or the motor cooks and I buy more. I was looking at the new compact ones with the LIPO batteries and was wondering if they're any good. I've gone thru about 15 of the 14.4's in my shop in the past 12-13yrs. and we use them mostly for drilling and tapping and sometimes screwing crates together.