I purchased a used Dewalt 12V impact driver and part of the deal included an
18V Dewalt drill/driver that is in somewhat bad shape. Its main problem is
the keyless chuck is pretty beat up. I'm trying to get the thing off. I've
removed a screw from inside the chuck that attaches the chuck to the spindle
(presumably), but I still can't budge the chuck. Does anyone have a
suggestion for getting this off? The instruction manual doesn't touch on
this point. Is it like a drill press where the chuck fits into a taper?
Get the largest Allen wrench you own.
Install the short end in the chuck jaws and tighten as best you
Use a hammer to hit the long end of the Allen as hard as you can.
If you were looking at the chuck, hit it in a counter clockwise
It may take several blows. Make them sharp and forceful. You'll
know when you succeed.
Keep the whole world singing . . . .
As others have suggested, put a large Allen wrench in the chuck and tighten.
Unscrew in the opposite direction that the retainer screw come out in.
Use the drill and a high clutch setting to loosen the chuck with the Allen
wrench clamped in a vise.
Take your new impact driver with any hex bit on it and tighten the
drill chuck around the bit, so you have a drill on either end of the
bit. The let er rip with the old impact gun and she should pop right
The chuck is threaded onto the shaft with a right-hand thread (the
screw you removed had a left-hand thread, correct?) Get the biggest
allen (hex) wrench you have that will fit into the chuck jaws and
put the short end of the wrench in the chuck. Tighten the chuck onto
the allen wrench, then smack the wrench sharply with a hammer in the
normal "lefty-loosie" direction.
Make it as simple as possible, but no simpler.
Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf.lonestar.org
I've read all the responses, and I think they're great. But I have a
question - if the shaft of the motor, well, the portion that protrudes
from the drill at least, isn't locked, what good will clamping an
allen wrench in the chuck be? Wouldn't the motor spin in response to
hitting that key thereby not loosening the chuck?
Keep in mind that this is entirely an academic question for me, I have
no need to remove any chucks. I'm just thinking of an old drill I had
where this would have been the situation.
The gears and the armature weight may be enough that a hard quick rap
on the allen wrench will break things loose. Most of my drills have a
fair bit of resistance from gears and armature weight. The better
drills have a much higher resistence. Driving screw with the Milwalkee
3/8 " drill is much more dangerous that the cheap $20 drill. The chepa
drill stops or bogs down when you release the switch. The Milwalkee's
armature mass keeps on working a good bit longer.
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