Reply by Ger21

I program CNC machines to cut hundreds of drawers a year, and always cut them 1/32” smaller.

Most slide manufacturers specify 1” +0 -1/16” as the tolerance, so anywhere between 1” and 1-1/16” should work. Shoot for 1-1/32”, and you have a little margin both ways.

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html