The crowning curve is exponential function which causes {HEAD ~ the contacting point} to move toward the tooth width end as the displacement increases and the radius of curvature becomes larger as the point on the curve approaches to {TAIL ~ 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 
The crowning curve is exponential function which causes { HEAD ~ the contacting point } to move toward the tooth width end as the displacement increases and the radius of curvature becomes larger as the point on the curve approaches to { TAIL ~ 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
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH