Pete, I've got a mint Jacobs 58B that came with my first SB9. I don't think
I've ever used it. Want to make me an offer?

Grant Erwin
Kirkland, Washington
to email me, do NOT "reply to" rather visit http://www.tinyisland.com/email.html

Pete & sheri wrote:

I went through a lot recently to find a particular chuck key myself. I
think I found some tables for chuck keys in the MSC catalog. The shank
diameter of the key seems to be the "key". Measure the diameter of the
key's hole in the chuck. Also, in those tables, I think they go by
chuck numbers such as you have here.

If this 5/8" chuck has a 1 1/2"-8 threaded back, then you probably don't
want to fool with it and you should just get rid of it, cheap, to me.

Pete Stanaitis