On 2/16/2014 12:54 PM, Tdacon wrote:
When the router bit manufacturers refers to a spiral-cut router bit as
up-cut or down-cut, are they consistently speaking with reference to the
router base? Or are they assuming a router-table orientation as opposed
to a hand-held router?

The ambiguity being, of course, that a router bit that cuts away from
the router is down-cut when the router is being hand-held, and up-cut if
the router is mounted under a router table.

Tom



Regardless of the orientation of the router, hand held or table mounted,
Up cut is pulling the debris up/out of the hole it cut.
down cut pushes the debris down/into the hole it cut.