Replacing chuck on old Craftsman DP?

[don-vee]

A while back, I scored an old 60s (I think) Craftsman floor model drill press, model 11324630. Here's a quick pic of the ol' workhorse:

I'd like to replace the original Jacobs 633C 1/2" chuck with a 3/4" chuck. I've done the searches, and I've looked at tutorials on Youtube, but I'm having no luck removing the chuck. Are there any tricks I don't know about, or is there something I'm missing?

 

[zkling]

I'd like to replace the original Jacobs 633C 1/2" chuck with a 3/4" chuck.

Why do you want to replace that chuck with a 3/4" chuck? Really anything past a 1/2" shank is too much for that machine. Manufactures use to put the proper size chuck on a machine to act as a fuse and limit the size of bit a press would take. Thanks to recent times and ploys to appease customers at all expenses some manufactures are now putting ridiculous size chucks on tiny presses.

That is IIRC a JT33-34C. It is a JT33 taper with a threaded collar on it. I am like 98% sure (note, not positive) that they do not make them in anything larger than 1/2" max cap. Craftsman, WT, delta and a few others used those threaded clucks back in the day.


To remove the chuck you need a spanner wrench to fit the hole in the threaded collar about the chuck. You then unthread the collar and it forces the chuck to pop off its taper.

 

[rsanter]

Leave the chuck and use reduced shank bits when you need them

Otherwise, soling is correct on how to remove it

Bob

 

[don-vee]

I guess I can always find a buddy with a 3/4 DP to bum off of if I should ever need it. Or, sell off my bigger bits and get a decent set of S&D bits.
Anyway, it's good to know how to remove it anyway, in case I ever have to replace it. Thanks for your help.