The crowning curve is exponential function which causes the contacting point to move toward the tooth width end as the displacement increases and {HEAD ~ the radius} of {TAIL ~ curvature} becomes larger as the point on the curve approaches to the tooth width end, so that even when the contacting gear number decreases when displaced, the increase in the contacting stress is suppressed and a larger power can be transmitted as compared to the conventional design 
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The crowning curve is exponential function which causes the contacting point to move toward the tooth width end as the displacement increases and { HEAD ~ the radius } of { TAIL ~ curvature } becomes larger as the point on the curve approaches to the tooth width end , so that even when the contacting gear number decreases when displaced , the increase in the contacting stress is suppressed and a larger power can be transmitted as compared to the conventional design
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