Figure 7-41.--Convex cutter.
WOODRUFF KEYSEAT CUTTER. --A
Woodruff keyseat cutter (fig. 7-38) is used to cut
curved keyseats. A cutter less than 1/2 inch in
diameter has a shank. When the diameter is greater
than 1/2 inch, the cutter is usually mounted on an
arbor. The larger cutters have staggered teeth to
improve the cutting action.
GEAR CUTTERS.--There are several types of
gear cutters, such as bevel, spur, involute, and so on.
Figure 7-39 shows an involute gear cutter. You must
select the correct cutter for a particular type of gear.
Figure 7-39.--Involute gear cutter.
CONCAVE AND CONVEX CUTTERS.--A
concave cutter (fig. 7-40) is used to mill a convex
designed especially to mill the "head space" of
surface, and a convex cutter (fig. 7-41) is used to mill
T-slots. T-slots are cut in two operations. First, you
a concave surface.
cut a slot with an end mill or a plain milling cutter, and
then you make the cut at the bottom of the slot with a
CORNER ROUNDING CUTTER.--Corner
T-slot cutter.
rounding cutters (fig. 7-42) are formed cutters that are
used to round corners up to one-quarter of a circle.
Figure 7-42.--Corner rounding cutter.
Figure 7-40.--Concave cutter.
7-25