Spiral bevel gears are typically made from hardened steel. The teeth of these gears are often ground for a far more precise finish enabling little noise at high speeds. You can specify left hand or right hand based on the direction you should 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 option. The gears operate at 90° to one another and also have “spiral” shaped tooth which provides maximum tooth surface get in touch with while rotating. With get in touch with spread over the complete tooth the spiral bevel equipment can be run much faster than the straight tooth bevel equipment and handle spiral gear china harder begins and stops.
We make spiral bevel gears only for industrial applications.
Worm gears 
are found in large equipment reductions. Gear ratio ranges of 5:1 to 300:1 are normal. The setup was created so that the worm can turn the gear, but the equipment cannot switch the worm. The position of the worm is definitely shallow and consequently the gear is held in place due to the friction between your two. The gear is found in applications such as conveyor systems where the locking feature can become a brake or an emergency stop.
The model cross-section shows an average placement and utilization of a worm gear. Worm gears have an inherent safety mechanism built-in to its design given that they cannot function in the reverse direction.