How to replace a chuck on a cordless drill that won't come off. 

I know if I tried that - I would have no threads left, and about a 1/16th" left of the spindle. 🤣 You can tell he's done this many times to get this good at it.

Yeah pretty much though I'd probably just put some anti-seize to stop it from welding to itself, ya never know when you have to take it apart again 😂😂

He used blue loctite, that stuff isnt permament, a bit of heat to the chuck from a gas torch would loosen it.. its the red stuff thats pretty much permanent.. @@AutodidactEngineer

Dewalt doesn't have a screw. It has a screw head on the drills spindle. That doesn't undo, like a screw would on a normal drill. It's used just to hold the spindle to stop it turning, so you can unwind the chuck. If you can't get the chuck off that way, you have to grind it.

The screw may be a left hand thread.

Yes, Cameron is correct; in all probability it's a left-hand thread.

Any time

@@adriaandoelman2577 here's a tip for free, Allen key, hex key is the same thing.

@@adriaandoelman2577 there's an old saying, you can lead a horse to water, but you cannot make him drink.

How about if teeth are frozen on the open position? What to secure the allen?

@@joaquinsuarez6090 if you have a welder just weld a rod to it or use a Dina Bolt if you want to save the chuck.

I found an easier way to remove chuck: I put a vicegrip on bottom of chuck and hitted down with a hammer a few times and came off within a couple minutes. Descubri una forma mucho mas facil y rapida de quitar el broquero: puse unas pinzas vicegrip en la parte de abajo del broquero y le pegue varias veces con un martillo hacia abajo y salio en menos de 2 minutos.

That's not accurate advice for these drills Jerome. They *don't* have a reverse-threaded centre bolt in the spindle, the chuck is simply screwed on to a very high torque value. The dealer-recommended way to get the chuck off these without grinding is to remove the gearbox from the front of the drill body, take out the geartrain to get access to the back of the spindle, and either use the proper DeWalt removal jig (which costs more than a new drill) or simply an adjustable spanner or wrench in a vice to clamp the backside of the spindle while unscrewing the chuck with a breaker bar.