Just picked up a used Powermatic 1140 DP a couple of weeks ago, can be seen here: http://www.sawmillcreek.org/showthread.php?t=115118 . It didn't come with a chuck key, so I'll need to get a replacement. Can anyone tell me what size to get; not sure what dimension is needed, is it the shaft or the key/gear (or whatever it is called) diameter?

Also, can anyone direct me to a source for an owners manual for this particular DP?

Thanks,
Ed