F3 Flaw Free Form dies. These are single-revolution dies, whereby a
part is formed in one die rotation using the same F3 geometry and grinding technology. Designs can be incorporated for
most two-die cylindrical machines in which six- to seven-part
revolutions can be achieved.Plunge/in-feed rolling. Employing a timed machine cycle,
plunge/in-feed rolling is used for general rolling of parts up to
the maximum face width of the dies, less die chamfersAnnular/through-feed rolling. Used for rolling threads that exceed
the maximum die width, annular/through-feed rolling can also be
used for the continuous rolling of long threaded bars or studsAdjusted and combination helical/through-feed rolling. An
alternative to annular ring-type dies for through-feed rolling,
helical combination speed-up dies rotate the work piece at similar
rates. However, helical slow-feed dies allow a coarser pitch thread
to be rolled on a smaller machine than annular rings3-roll and 2-rollFull regrinding services