Posted by John Benario on February 13, 2016 at 18:26:28:
In Reply to: Modifying a Barber Colman 1-1/2 for larger gears? posted by Gregg Eshelman on January 14, 2016 at 06:58:16:
I have a 1-1/2. I can go to just above 26 mm, with my 8 mm bore hob. You could go bigger if the hob were smaller, but I would count on any hobs being much smaller than the ones I use.
All 8 mm bore hobs I have are about the same OD.