Weston Bye - Author, The Mechatronist column, Digital Machinist magazine
~Practitioner of the Electromechanical Arts~
Theory & Practice-
Theory is when you know something but it doesn't work.
Practice is when something works but you don't know why.
It it dangerous to combine Theory & Practice;
nothing works and you don't know why.
On my Rockwell 11x24, the nut is about 4 1/2" dia. with slots about 1/2" wide and about 3/16" deep. The spanner is a hinged type, sort of like this from Enco: http://www.use-enco.com/CGI/INSRIT?P...PMAKA=307-3637