Chuck removal

[Mark]

How do you get the chuck off a drill? I bought an ancient Duro 3/4" wrist breaker (hehe) drill and the chuck has a rough place in it when about half opened. I have soaked it and worked it back and forth, hoping to get the rust or crud broken loose....b ut with no joy. So, I figure the chuck needs to come off and be taken apart for further assessment. So how does it come off? I don"t know how to hold the shaft still....if the chuck screws off. This old drill doesn"t reverse.....if that matters. It does run smooth as butter, no ozone smell, no noisy bearings....just a sticky chuck.

 

[Jiles]

If the drill motor is non reversing, you can simply insert the proper size metal pin into one of the three round holes that the chuck key fits into and strike with a hammer.
When drilling, the chuck is continuously tightening so you will need to turn the chuck in the opposite direction of rotation.

 

[Roger in Iowa]

Open the chuck as large as possible and look down in it. Sometimes there is an allen head screw holding the chuck on.

 

[Mark]

Thanks for the information. Hopefully I can get it off today and see what is wrong.

 

[Anonymous-0]

Open the chuck and remove the left hand threaded screw from down in the bottom of the chuck if it has one. Remember to loosen a left hand thread it has to be turned in a clockwise direction.

Insert the largest hex allen wrench you have in the chuck and tighten it down on the hex. Place the side of the chuck down on a piece of wood and strike the end of the hex allen wrench with a soft hammer to remove the chuck in a counterclockwise direction.

 

[Anonymous-0]

After removing the screw. Use the chuck key and smack it with a hammer --real hard if you have to, your chuck is shot anyway. If you ruin the chuck key, you will probably be getting a different one anyway.

As you try to fix the old one, tap downward with a hammer, to jar all the jaws, often that is a simple fix.

 

[TimV]

First step is to see if there's a screw, bolt, or Allen head in the bottom. If not, I've also used a piece of hex stock in the jaws and a properly-sized impact socket with an impact over the end to get them off--many are just screwed on. An alternative method is an Allen "L" wrench in the jaws and a few taps with a hammer--same basic method as used on lathe chucks.

 

[Anonymous-0]

Some chucks fit on a tapered shaft.They are removed with a pair of wedges.

 

[Mark]

Well, there is no allen screw and placing a round punch through the holes in the chuck and hoping to whack it loose has not worked. Because I cannot lock the shaft, trying to unscrew it seems a wasted effort. But, somehow it was put on and somehow, it comes off.

Back to the drawing board!

 

[Truckiejas oz]

some have a pair of flats on the shaft between the chuck and drill case. you may need to grind down a old spanner thin enough to fit between the two in order to lock the shaft.