Craftsman 21602 - 16 in. Variable Speed Scroll Saw Operator's Manual page 16

LEADING EDGE - The front edge of
the workpiece that is guided into the
blade.
SAW BLADE PATH - Area or line of
sight of the workpiece moving in line
toward the saw blade edge.
SURFACE - Top of workpiece being
cut.
TRAILING EDGE - The end of the
workpiece edge last cut by the saw
blade.
WORKPIECE - Material on which the
cutting operation is being performed.
Leading edge Saw blade path
Kerf
Workpiece
Trailing edge