Originally Posted by mharwell01

this may be a dumb question and i may be missing the point entirely but i just got a template guide set and would like to find out if anyone knows of a chart or guide that lists the guide bushing size to use for making holes and then the correct bushing to switch to to make the patch to fit the hole precisely for a particular bit size. i may be making this harder than it is, but without having to calculate each time or use trial and error, it would be nice if someone more experienced already has it written down.

most of the time id be using a 1/8" bit but there might be occasions where id use a 1/2" if i had to remove a lot of material within the hole im making. i have a 1/8", 1/4", 5/16", 1/2" straight cutting bits.

or is there a standard addition or subtraction everyone uses that i dont know about. any help is appreciated. also standard (US) is what i need rather than metric.