File Sizes for the Foley Saw Filer

Here's a quick summary from the Foley manual on which files should be used for different teeth sizes. Note that you should probably use smaller files for the finer teeth if you're going to be sharpening by hand.

6" regular taper: 5-7 ppi
6" slim taper: 8-10 ppi
6" extra slim taper: 11-13 ppi
6" double extra slim taper: 13-16 ppi

For the fine stuff - 13 ppi and up - you can rig up a 5" double extra slim taper in the older Foley machines by using a 1/2" dowel to hold the file. There is just enough clearance to pull it off, but you need to be sure to get the file centered in dowel. I haven't tried this on the newer Foley machines, but where there's a will, there's a way!