Page 149 - Gear Technology Solutions

10.4 Independent Angular Profile Shift

The angular profile shift is achieved in two steps. In step 1 the shaft angle is pre-
corrected before the profile shift is applied. This principle is explained in Figure 11.

Figure 11: Principle of proportional (angular) profile shift
without shaft angle change

Figure 11 shows the outline in a cross-sectional view of a pinion and a gear
(drawn with solid lines). The pinion and gear axis intersect at the crossing point
and include the nominal shaft angle S 1. In a first step, before the profile shift is
applied, a pre-corrected shaft angle S 2 is calculated based on the desired profile
shifts of pinion and gear. The desired pinion profile shift is applied at the outer
cone distance ROUT to calculate an angle xj 1:

xg 1 = atan(X1*mn/ROUT) (11)

The pinion axis is then rotated around the crossing point about the angle xj 1 to the
pre-corrected pinion axis position, drawn with dashed lines. The original pinion pitch

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