HELICAL GEAR

HELICAL GEAR

There are basic difference between spur and helical gears . while the teeth of spur gear are cut parallel to the axis of the shaft , the teeth of helical gear are cut in the form of a helix on the pitch cylinder. In spur gear the contact between meshing teeth occurs along the entire face width of the tooth resulting in a sudden application of the load . In helical gear the contact between meshing teeth begins with a point on the leading edge of tooth and gradually extends along the diagonal line across the tooth .

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