Chuck removal, Technical, but a little mechanical?

Thread Starter

MaxHeadRoom

Joined Jul 18, 2013
30,557
Per the title! Has anyone been faced with this posters dillema? I am faced with the same issue and do not want to screw any thing up,
The chuck is mounted with a brass sleeve, no sign of any thing threaded.

1765557874544.png
 

WBahn

Joined Mar 31, 2012
32,702
Is there enough information on the chuck to look up the details about it? Could be a tapered fit, but could also be a press or thermal fit (though I doubt it's a thermal fit).

Can the end of the shaft be seen from the front of the chuck when it is fully opened?
 

Thread Starter

MaxHeadRoom

Joined Jul 18, 2013
30,557
The inside view is just the end of a solid brass circuilar mount of some form.
Appears about the same diameter as the rear view?
 

twohats

Joined Oct 28, 2015
606
Does it operate clockwise and anticlockwise?
If clockwise only, suspect lefthand securing thread.
Good luck..............
 

WBahn

Joined Mar 31, 2012
32,702
If it's threaded, there should be a pretty obvious way to lock the motor shaft, such as a hex fitting of some kind or a pin hole.
 

Thread Starter

MaxHeadRoom

Joined Jul 18, 2013
30,557
There is a minimum amount showing at the rear As is seen in the photo,, you can just catch a small ring of brass at the rear of the chuck.
No apparent method obvious.?
I was hoping someone had been there, and tell if taper, thread or?
 

Thread Starter

MaxHeadRoom

Joined Jul 18, 2013
30,557
OK, I plugged in all the info from the chuck and Google AI came back with
"

  • Mount Type: Features a B10 taper mount (conical fit), designed to connect to a compatible arbor or spindle (e.g., a motor shaft connecting rod).
 
Put the key in the chuck and give it a good whack with a soft mallet (Anticlockwise).
My experience is that an ordinary hammer without having to whack too hard will break the stiction. A soft mallet may not transfer sufficient instantaneous impact. Heat may help; penetrating oil like WD40 or home made 50/50 mix of acetone (nail varnish remover) and vegetable oil.
 

WBahn

Joined Mar 31, 2012
32,702
OK, I plugged in all the info from the chuck and Google AI came back with
"

  • Mount Type: Features a B10 taper mount (conical fit), designed to connect to a compatible arbor or spindle (e.g., a motor shaft connecting rod).
I don't remember the correct name for the tool, but it is designed expressly for this (removing pulleys from shafts). It looks like a tuning fork except the tangs are tapered down to a point. You straddle the shaft and then tap the back of the the handle. Many auto parts tools have them for loan or rent.
 

SamR

Joined Mar 19, 2019
5,470
There is typically a slot in the side of the Jacob's chuck for the wedge, but I don't think that is the case here. Try putting a block of scrap wood on the top of the chuck and smack downward sharply on it with a hammer. Spent a summer working in a machine shop as a large drill press operator and very familiar with Jacob's chucks and drill sharpeners. The shaft of the chuck on my Wen benchtop drill press also inserts into an enclosed in the frame Jacob's chuck but never needed to remove it.

Edit: Guess what I did... Hard plastic faced hammer!
1765586814367.png

Also, I ran the head down on my drill press and found it has a slot for the Jacob's Chuck wedge. Which I don't have...
1765587476717.png
 
Last edited:

WBahn

Joined Mar 31, 2012
32,702
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