Helical Inline Gear Motors Helical gears aren’t specifically comparable to worm or bevel gearbox systems. They are in fact an alternative to spur gears where the teeth are parallel to the axis of the apparatus itself. For example, in an inline application, you can have either spur OR helical gears. An inline helical gearbox electric motor will usually be quieter and may carry higher loads than motors using a spur gearbox. They may be more costly in initial price, and manufacturers need to take into account axial thrust. However, the actual fact that the helix position may differ from 15 to 30 degrees permits flexibility when it comes to design. They are used in in-line helical spiral bevel gear motor applications as well as parallel shaft applications.

The advantage of helical gears is that it produces a rolling action, is quieter, and has less vibration in comparison to spur gears. In addition, it produces less friction and permits more tooth to be engaged at the same time as one’s teeth roll across one another.
There are myriad types of gearing. Some manufactures make use of spur gears instead of helical gearing, for instance. However, there is not as much surface contact, as observed above and consequently there is more sound and much less torque transfer possible.

Another system where noise is certainly common are planetary equipment systems, where in fact the one gear is completely within the other. They also require grease lubrication plus they must be constructed with expensive materials in order to maintain a long-lifestyle and bearing integrity. An easier variant, internal gearing, suffers from the same problems and can only be used with parallel shaft.

Finally, hypoid gearing could be best understood as similar to bevel gearing, but with the gear axes not really intersecting. The sliding action can create huge amounts of high temperature and the alignment needs great care.