Helical gears have the following advantages:
– Capable of transmitting higher torque due to the larger meshing area.
– No jerks when starting the mechanism. Can be used in drives and mechanisms operating with variable loads.
-Less noise level even when operating in modes with maximum permissible load.
However, it should be noted the disadvantages that are characteristic of helical gears:
-Increased meshing surface increases the value of the friction force. On this basis, more stringent requirements are imposed on the quality and frequency of replacement of lubricants.
-Increased warmth and slightly reduced efficiency.
-The helical gear shaft is subjected to greater forces, therefore mounting on a thrust bearing is required.
In addition, the production of a spur gear is technically more complex, so the part costs a little more.