Homebrew PCBs

My regular HSS scroll saw blades are good for about a foot of pcb then 
they're toast.  However, that's putting all the wear on only a few teeth.

If you use a fence, the piece between the blade and the fence should be 
at least twice as long (parallel with the fence) as it is wide (between 
blade and fence) to reduce the risk of kickback.  If it's not long 
enough, or too wide, use a miter or sled instead.  I suspect for most 
pcb projects, a sled would be appropriate.