How do I separate a Jacobs chuck from a Morse MT5 arbor?

[gr8legs]

Hi all,

I have a Jacobs 14N chick on a Morse #5 arbor that is way bigger than anything I have in the shop - and I want to remove the chuck and put it onto a more suitable size Morse arbor.

I am presuming it is a Morse to Jacobs arbor adapter fitted to a Jacobs chuck - but most Jacobs chucks I have seem will have a JT number on them, this one doesn't.

So, is it likely that applying sufficient whacking (technical term for applying a BFH) force between the chuck and the adapter will eventually separate them or is it all one piece and I'm on a fool's errand?

Thanks in advance,

Stu

 

[Braeden P]

This is one way to use a press

 

[Braeden P]

Here is how to make wedges

 

[benmychree]

I have used the wedges, and they generally work well.

 

[gr8legs]

Cool! Thanks!

Stu

 

[Tozguy]

Since the MT 5 arbor will be surplus when the chuck is removed why not just leave the chuck on and turn the MT5 down to a smaller MT?
Could be an interesting project.

 

[NC Rick]

Hi all,

I have a Jacobs 14N chick on a Morse #5 arbor that is way bigger than anything I have in the shop - and I want to remove the chuck and put it onto a more suitable size Morse arbor.

I am presuming it is a Morse to Jacobs arbor adapter fitted to a Jacobs chuck - but most Jacobs chucks I have seem will have a JT number on them, this one doesn't.

So, is it likely that applying sufficient whacking (technical term for applying a BFH) force between the chuck and the adapter will eventually separate them or is it all one piece and I'm on a fool's errand?

Thanks in advance,

Stu

View attachment 336114

When using the wedges, I find that just pressing in a vise, arbor or hydraulic press alone isn't always effective, impact seems to work better for me. Fist time I tried it by squeezing alone the wedges just spread or broke. I had success when I employed a copper hammer in the process. I'm not very experienced with this but I gained some on a few used chucks recently.

 

[Firstram]

I removed the straight arbor from my ebay 18n with hydraulics. Drill and ream a 1/4" hole in the bottom of the chuck and fill it with oil. Stick the arbor in a piece of pipe bigger than the arbor but smaller than the chuck sleeve. With the assembly standing up use a short piece of 1/4" rod as a piston and give it a wack with a hammer. The oil pressure will pop that arbor off with authority!