Can't remove old drill chuck. No screww head visible
I am replacing a keyless chuck on a B&D KR650CRE. I have the new part which has a screw to attach it as I expected. However looking into the old chuck I cannot see a screw head to unscrew. It looks like a smooth dics with a dimple in the middle.
Re: Can't remove old drill chuck. No screww head visible
1. Unscrew all screws on side of drill. (The side with the screws will lift off and nothing will be disturbed.)
2. Lift out the chuck and gear shaft. It is all one piece. (Nothing will fall apart.)
place vice grips around the shaft just behind the chuck head. ( clamp the vice grips extremely tight.)
3.Place the chuck head (pointed down) in a very heavy vice and tighten the vice very tight. Push or pull the vice grips counter clock-wise. ( I situated my vice grips so I could give a sharp pushing blow with the palm of my hand.)
4. Should break free immediately!
5. You will probably want to pay me a lot of money for helping you solve this problem, but it is not necessary.
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Re: Can't remove old drill chuck. No screww head visible
I can't find that model number in their database but I would guess that the chuck that is on it now is for a non-reversing tool and therefore would not have the hole for the chuck retaining screw. As long as the threads are the same I don't see a problem putting it on. Let me know if I can help further. Dave
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The screw in the bottom of the chuck is reverse threaded (left tight, right loose). It is also lock-tited so will be hard to remove. Make sure you have a screw driver well seated in the screw and turn it backwards (clockwise) to break it free. Once that is out, lock the short end of an allen wrench (at least 3/8" to 1/2") in the chuck. You'll have to lay the drill on a bench with the long end of the allen wrench hanging over the edge so you can hit it with a hammer hard enough to break the chuch free from the anvil. The chuck is threaded left loose, right tight so hit the wrench to turn the chuck counter clockwise. When you replace the new chuck use a small drop of lock-tite on the anvil threads and screw if it doesn't have some on it already.
If the head of the screw is stripped out to much for a driver to grip and remove it you have two options. 1. Use another drill to drill in the center of the screw with a bit just big enough to remove the head. With the head of the screw off, the chuck can be removed from the spindle. There should be enough of the screw remainin in the spindle that you can grip it with vice grips and remove it. 2. Using a metal cutting wheel on a grinder, you have to cut the end of the chuck off, aiming to cut just under the head of the set screw so you don't damage the spindle. After cutting, let things cool off before trying to remove the rest of the chuck and screw from the spindle.
Open the chuck wide open. In the center is a retaining screw, they usually have left hand threads. Remove the screw. Take an allen wrench1/4" to 3/8" in size and fasten the short side tightly in the chuck. The chucks are usually right hand thread, so take a small hammer and strike the allen wrench to turn the chuck to the left to loosen it. Once you have the chuck off, verify the thread size of the drill motor shaft, then go to McMaster-Carr and choose the one you need.
If the chuck will open far enough, reach in with a screwdriver and remove the retaining screw. If a key type, insert the key and tap the key in a CCW direction to loosen. If a keyless type, use 'Channel-lock' pliers and tap them lightly in a CCW direction. Reverse the operation with the new chuck. Good luck!
It really depends on the model. Here is a general description of how to remove most regular keyed and keyless chucks from corded and cordless drills:
Some chucks have a Left Handed screw that secures them to the spindle so they do not come loose. You can look into the chuck with a flashlight and see if there is a chuck screw. (It may be a torx head, flat head, or philips head) You will need to remove this screw first before doing anything else. Sometimes there is loc-tite applied to the screw so it may be stubborn and sometimes you will strip the screw head. Remeber that the old saying lefty-loosey, righty-tighty does not apply here. Left is actually tightening a left hand thread, so you want to turn it right to loosen. I know, it will feel weird but thats the way to loosen it. You may have to apply some heat to the screw in order to get that loc-tite to break. A pencil torch works great. If you strip the head out you will have to use a drill press and drill the screw head off.
After removing the screw you can remove the chuck.
To remove the chuck, the easiest way is to use a hex socket bit and an impact wrench. Put the hex bit in the chuck, and depending on the condition of the jaws, tighten the jaws as much as possible to the hex bit. Put the impact in reverse and bump it until the chuck is loosened. If you do not have access to an impact wrench you will need to put a hex key with a long arm into the chuck and tighten it then place the drill on the edge of your bench and give it a good whack with a 3lb hammer. It may not come off immediately so you may have to reset and do this a couple of times. Not the most effective way to remove a chuck, especially if one of the jaws is missing, but that is what most manufacturers tell you to do. I myself cut the collar off with a die grinder and then use a pipe wrench on the body of the chuck applying constant pressure while heating the chuck body with a torch. Works every time. Heat is our friend on stubborn chucks. Good luck, any questions please post.
open jaws for large size bit.look in bottom and there will be a screw slot or phillips head screw or possibly an allen head screw.remove this,by possibly turning clockwise. and then chuck up a large allen wrench. try removing the chuck by tapping wrench with hammer. this may be threaded on counterclockwise.have to try both ways.
open the chuck all the way and then look down in the centre of the chuck you should see a cross head screw
unscrew and the chuck should pull out as this is on a taper system ( note the screw is left hand thread )
1. Turn the screw clockwise to take it out.
2. Then you needs 3/8 allen key & insert the short side of the allen key & tighten the chuck.
3. hold the drill at the edge of the table & wack the allen key
counter clockwise & do it again as needed.
4. dewalt keyless chuck will fit but you might add a washer to insure the chuck is not rubbing the clutch collar.
5. putting it back together the other way.