DIRECT GEAR DESIGN

1.2 Gear Design Based on Rack Generating Technology
In the mid-eighteenth century, Swiss scientist Leonard Euler introduced the gear tooth flank profiles formed by the circle involute curve. An important feature of the involute gear profiles is producing the theoretically constant rotational velocities’ ratio. The involute tooth profiles could be used for the external and internal gearings—as well as for the rack and pinion mesh.

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