Back in May I published exhaustive change-gear tables for the Enco, Harbor
Freight, and Grizzly 12 x 36 lathes. I've updated the Grizzly version to
include its 86/91 step gear idler option:

http://www.truetex.com/grizzly-12x36-pitch.htm
http://www.truetex.com/grizzly-12x36-gear.htm

These are for the Grizzly G4003, not the G4003G "gunsmith" version.

Original thread:

http://groups.google.com/group/rec.c...80ddf5442cd566