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drill in bench screw a little bench hammer and place te drill on the left side horizontal of the bench screw on the top of the claws p the machine hangs free place the little bench hammer with the point against the top of the claws of the chuck and with a middle heavy nylon hammer hit the bench hammer slowly that you see that the machine is moving ( use of some wd40 or other oil in the chuck will helping a bit ) it will between 2 and 5 minutes that you have rescued a chuck and "sometimes" also the drill its also depending on the diameter of the accesoires you have used.
Yes, the bit should have about 1/2" to 1" of free movement in and out when the gun is not running but should not be able to fall out of the gun when pulled on.
Grab the bit and see if it will move in or out of the chuck around a half inch. If the bit will not move at all inside the chuck at all. Lock the bit in a vise and strike the chuck with a rubber mallet. This will usually get the bit out.
Sounds like the bit bent slightly and as a result jammed into the chuck. Open chuck as much as possible and have someone pull the bit out while your tapping it with a small hammer. The vibration from the tapping might loosen the bit from the chuck.
The spade bit sold with the hammer drill was actually too large for the hammer drill. We found that the spade bit had over heated (not from overuse or heavy use as only two ladies were using the hammer drill) but because the bit was too large it put too much weight on the drill. The bit had to be removed from the chuck using a hammer and force causing a bearing to come out and the chuck now needs repair. Solution repair the chuck on the hammer drill and buy a lighter spade bit. Then continue jackhammering the cement out of the shower cubicle.
You have to keep the shanks of sbs bits clean and lightly greased. When you snap the bit into the chuck, the bit should move freely in and out between the retainer and the hammer head.
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