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An example for X1 = 0.5 and X2 = 0.5 is shown in Figure 7, which shows a
significant degradation of the tooth contact and an increase in the lost area. The
tooth contact in Figure 7 is significantly smaller than for the baseline, and the
active working profile is less than half of the active working profile of the baseline.
The lost root area is slightly smaller than the baseline, but the lost top area has
increased.
Figure 7: Ratio = 2.9, Ease-Off and tooth contact for X1 = 0.5 and X2 = 0.5
10.3 Global Explanation of the Independent Angular Profile Shift
The limitations seen in the parallel profile shift and the fact that a profile shift
should be proportional to the profile depth along the face width of tapered depth
teeth lead to the development of an angular profile shift. Because the angular
profile shift changes the shaft angle, a unique method was developed which
applies a pre-correction to the shaft angle in such a way that the resulting shaft
angle is equal to the nominal and required shaft angle, after the angular profile
shift is applied.
Figure 8: Initial pitch cones with original shaft angle
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