Replies

1. 
   adastra | Mar 27, 2005 06:47am | #1

   Inlay, stringing or banding come to mind. So you don't fuzz up the cut or chip it out.

   But I haven't done enough of it to say that it makes a big difference, I've used both and don't remember having an issue with either.

2. 
   SBerruezo | Mar 27, 2005 07:47am | #2

   Downcut spiral is for handheld router situations, upcut is for table-mounted routers.

    

   Young, poor, and eager to learn

3. 
   charlesm | Mar 29, 2005 12:36am | #3

   You use a down spiral when surface finish is important and chip clearance isn't an issue (such as for shallow cuts or when inverted in a table). The up spiral is definitely superior for chip clearance and for plunge cutting but will splinter delicate material like veneered plywood.

   Charles M
   Freud America, Inc.