Helical Inline Gear Motors Helical gears are not 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 gear 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 will bring higher loads than motors using a spur gearbox. They can be more costly in initial price, and manufacturers need to take into account axial thrust. Nevertheless, the fact that the helix angle may differ from 15 to 30 degrees permits flexibility in terms of design. They are found in in-line applications in addition to parallel shaft applications.

The benefit of helical gears is that it produces a rolling action, is quieter, and has less vibration in comparison to spur gears. It also produces much less friction and allows for more teeth to be engaged simultaneously as the teeth roll across one another.
There are myriad types of gearing. Some manufactures make use of spur gears rather than helical gearing, for example. However, there isn’t as much surface get in touch with, as observed above and as a result there is more noise and much less torque transfer possible.

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

Finally, hypoid gearing could be best understood because similar to bevel gearing, but with the helical spiral bevel gear motor apparatus axes not really intersecting. The sliding actions can create large amounts of temperature and the alignment requires great care.