helical spiral bevel gear motor Helical Inline Gear Motors Helical gears are not specifically much like worm or bevel gearbox systems. They are actually an alternative to spur gears where in fact 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 motor will usually be quieter and may bring higher loads than motors utilizing a spur gearbox. They could be more costly in initial cost, and manufacturers need to account for axial thrust. However, the actual fact that the helix angle may differ from 15 to 30 degrees permits flexibility when it comes to design. They are found in in-line applications in addition to parallel shaft applications.

The advantage of helical gears is that it produces a rolling action, is quieter, and has less vibration compared to spur gears. In addition, it produces less friction and allows for more teeth to be engaged concurrently as the teeth roll across one another.
There are myriad types of gearing. Some manufactures use spur gears rather than 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 program where noise is certainly common are planetary gear systems, where in fact the one gear is completely within the other. In addition they require grease lubrication and they must be built with expensive materials in order to maintain a long-life and bearing integrity. A simpler variant, internal gearing, suffers from the same issues and can only be utilized with parallel shaft.

Finally, hypoid gearing may be best understood as similar to bevel gearing, but with the apparatus axes not really intersecting. The sliding actions can create large amounts of high temperature and the alignment requires great care.