I just got my 1st one of these, with 6 original bits but without the side handle
and at a great price. I just need to know how the chuck is loosened from a tight
closed position. I got the chuck off the threaded shaft but I cannot see how the
jaws open and close, it looks like the chuck has two holes on the bottom on
either side of the thread hole so is that the lower bottom peice turns, apart from
the upper connicle part that has the jaws? Like maybe I need a spanner U-wrench
to loosen it?
Thanks anyone who can help,
Alex
AArDvarK wrote:
<snip>
> I noticed the way it works, place in a bit and tighten by screwing the
> chuck down the thread shaft, as tightened it will stay that way while in
> use, but I still like the key type better.
To tighten or loosen the chuck hold the chuck with one hand and turn the crank
with the other.
--
Jack Novak
Buffalo, NY - USA
(Remove "SPAM" from email address to reply)
> > If the lowest part of the chuck, no idea what to call it, has flats use
> > a wrench an them and a soft jawed pair of pliers, strap wrench or maybe
> > just your hand. The chuck IIRC is a base piece, with the flats, and a
> > top piece that screws down onto it. As the top piece screws down it
> > compresses the jaws to hold the bit in place.
> > If it doesn't come loose with a little pressure add penetrating oil and
> > wait, maybe a few sharp taps to help the oil work it's way in.
> > I've done a few this way. Once it's is apart clean everything, remove
> > any burrs and reassemble. enjoy.
> > Joe
Thanks Joe, a kind reply. I found that the chuck is one solid peice with
sprung jaws inside. I gave it some tapping and the jaws went back down
into the chuck. Now I have it soaking in wd-40 in a covered can. The
grit build-up is too much, and the jaws and spring need to be worked.
I noticed the way it works, place in a bit and tighten by screwing the
chuck down the thread shaft, as tightened it will stay that way while in
use, but I still like the key type better.
Alex
If the lowest part of the chuck, no idea what to call it, has flats use a
wrench an them and a soft jawed pair of pliers, strap wrench or maybe just
your hand. The chuck IIRC is a base piece, with the flats, and a top piece
that screws down onto it. As the top piece screws down it compresses the
jaws to hold the bit in place.
If it doesn't come loose with a little pressure add penetrating oil and
wait, maybe a few sharp taps to help the oil work it's way in.
I've done a few this way. Once it's is apart clean everything, remove any
burrs and reassemble. enjoy.
Joe
AArDvarK wrote:
> I just got my 1st one of these, with 6 original bits but without the side handle
> and at a great price. I just need to know how the chuck is loosened from a tight
> closed position. I got the chuck off the threaded shaft but I cannot see how the
> jaws open and close, it looks like the chuck has two holes on the bottom on
> either side of the thread hole so is that the lower bottom peice turns, apart from
> the upper connicle part that has the jaws? Like maybe I need a spanner U-wrench
> to loosen it?
>
> Thanks anyone who can help,
>
> Alex
>
>
Should have included this in the first reply
http://www.public.coe.edu/~rroeder/mf.htm
Joe
Joe Gorman wrote:
> If the lowest part of the chuck, no idea what to call it, has flats use
> a wrench an them and a soft jawed pair of pliers, strap wrench or maybe
> just your hand. The chuck IIRC is a base piece, with the flats, and a
> top piece that screws down onto it. As the top piece screws down it
> compresses the jaws to hold the bit in place.
> If it doesn't come loose with a little pressure add penetrating oil and
> wait, maybe a few sharp taps to help the oil work it's way in.
> I've done a few this way. Once it's is apart clean everything, remove
> any burrs and reassemble. enjoy.
> Joe
>
> AArDvarK wrote:
>
>> I just got my 1st one of these, with 6 original bits but without the
>> side handle
>> and at a great price. I just need to know how the chuck is loosened
>> from a tight
>> closed position. I got the chuck off the threaded shaft but I cannot
>> see how the
>> jaws open and close, it looks like the chuck has two holes on the
>> bottom on
>> either side of the thread hole so is that the lower bottom peice
>> turns, apart from
>> the upper connicle part that has the jaws? Like maybe I need a spanner
>> U-wrench
>> to loosen it?
>>
>> Thanks anyone who can help,
>>
>> Alex
>>
>>
>
AArDvarK wrote:
>>>If the lowest part of the chuck, no idea what to call it, has flats use
>>>a wrench an them and a soft jawed pair of pliers, strap wrench or maybe
>>>just your hand. The chuck IIRC is a base piece, with the flats, and a
>>>top piece that screws down onto it. As the top piece screws down it
>>>compresses the jaws to hold the bit in place.
>>>If it doesn't come loose with a little pressure add penetrating oil and
>>>wait, maybe a few sharp taps to help the oil work it's way in.
>>>I've done a few this way. Once it's is apart clean everything, remove
>>>any burrs and reassemble. enjoy.
>>>Joe
>
>
> Thanks Joe, a kind reply. I found that the chuck is one solid peice with
> sprung jaws inside. I gave it some tapping and the jaws went back down
> into the chuck. Now I have it soaking in wd-40 in a covered can. The
> grit build-up is too much, and the jaws and spring need to be worked.
> I noticed the way it works, place in a bit and tighten by screwing the
> chuck down the thread shaft, as tightened it will stay that way while in
> use, but I still like the key type better.
>
> Alex
>
>
So, how did they get the jaws, and springs, into the chuck? I've seen a
few that looked to be one piece, but it was due to a very precise fit
between the bottom oiece and the base. There's also a circular piece
inside that the shafe presses upwards to tighten the jaws. When unscrewed
the shaft releases the pressure and the springs push the jasw open and
down. wish I had one in front of me to look at so I could describe it
better. Maybe I'll remember when I get home.
joe