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1937 Chief
02-23-2014, 05:05 PM
I picked up a Chicago Supreme 9T3 3/8 to 3/4 drill chuck at a swap meet. Got it home, and found it is very hard to open. There is a lot on info on Jacobs Chucks repair, but nothing on the Chicago Supreme. They don't come apart like the Jacobs Drill Chucks. Anyone have any idea how these chucks come apart? Thanks, Stan

Paul Alciatore
02-23-2014, 06:50 PM
I have never seen one of that brand, but I have seen drill chucks where a two part outer housing was screwed together.

I would also apply a liberal amount of penetrating oil and let it soak overnight.

Daveb
02-23-2014, 07:12 PM
I would also apply a liberal amount of penetrating oil and let it soak overnight.[/QUOTE]

Better still, stand it nose down in a tin of kerosene for a few days, take it out and give it a twiddle occasionally, amazing how much swarf and dirt comes out.
Daveb