Page 174 - Gear Technology Solutions

slots and tapered teeth as shown in the center of Figure 6. The coupling mem-
ber with slot width system 2 has to be paired with a member which consists of
slot width system 3. Slot width system 3, as shown to the right in Figure 6, has
tapered slots and parallel teeth and fits in a member having slot width system
2. Some industries require for some reasons, designs where one member has
parallel slots, and the second member has tapered slots. One frequently men-
tioned reason for this design is the improved self-centering, which however
has not been scientifically proven and is solely based on practical experiences.

Figure 6: Three slot width systems of Coniflex couplings

12.3.2 Free Choice of Pressure Angles

A significant advantage of Coniflex is the possibility to manufacture on stand-
ard Phoenix machines not only couplings with positive pressure angle (Figure
7, left side), but also to choose zero degree or negative pressure angles as
shown in Figure 7, center and at the right side.

Due to the peripheral Coniflex Plus cutters, any customary pressure angle can
be realized with the same cutter and even with the same cutting blade geome-
try. There is no radial cutter tilt required like in many cases of Curvic couplings
with negative pressure angles. The radial tilt, required for Curvic couplings with
negative pressure angles requires negative machine root angles which are lim-
ited on standard Phoenix machines.

159