Spiral bevel gears are typically made from hardened steel. One’s teeth of these gears are often ground for a far more precise finish allowing for little noise at high speeds. You can specify left hands or right hand based on the direction you have to run the gears
If you have a higher speed application that will require a whole lot of torque then spiral bevel gears are a great choice. The gears operate at 90° to one another and have “spiral” shaped teeth which gives maximum tooth surface get in touch with while rotating. With contact spread over the complete tooth the spiral bevel equipment can be run much quicker than the straight tooth bevel equipment and handle harder begins and stops.
We make spiral bevel gears limited to industrial applications.
Worm gears are found in large gear reductions. Gear ratio ranges of 5:1 to 300:1 are regular. The setup was created so that the worm can change the gear, but the equipment cannot switch the worm. The position of the worm can be shallow and as a result the gear is held 
in place because of the friction between the two. The gear is situated in applications such as for example conveyor systems where the locking feature can become a brake or a crisis stop.
The model cross-section shows an spiral gear china average placement and use of a worm gear. Worm gears have an inherent security mechanism built-in to its style since they cannot function in the reverse direction.