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Figure 3: Interference calculation

The disadvantage of this is the fact that now there will be a small contact pat-
tern located in the center of the spline face width. The advantage is that the
interference is reduced and that the small contact patterns will only travel small
amounts towards the ends of the spline if misalignment is applied which will
reduce the friction.

15.6 Roof Top Spline

The interference problem of barrel tooth splines is shown in Figure 4 (red
graphs in center and bottom graphic. The solution to this problem is a roof top
shaped flank surface, as shown with the green graph in Figure 4. There is a
straight-line relief from the center of the face width to both sides. If the misa-
lignment is applied, then 50% of the spline flank surface has full contact. With-
out misalignment it appears as if the contact zone is just a line at the center of

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