My KO Lee 300 has opposite threads on each side.

Gunner
.....................................

Does it have a keyway on the arbor like the Model 900?

RWL
.....................................

No. If it has a keyway..then there has to be some sort of a nut to hold
the adaptor that uses the key.

Sounds like you need The TOOL. WHich on many surface grinders etc
etc..is a pin spanner or clutch spanner that holds the adapter while
you break the nut off.


Gunner
................................

I think I need to upload some pix. I don't think I'm describing it
well enough for you to envision it
I'll post a link when I have them up.

RWL