Spiral bevel gears are typically created from hardened steel. The teeth of these gears are usually ground for a far more precise finish allowing for little noise at high speeds. You can specify left hand or right hand based on the direction you need to run the gears
If you have a high speed application that requires a lot of torque then spiral bevel gears certainly are a great option. The gears run at 90° to one another and have “spiral” shaped tooth which provides maximum tooth surface 
get in touch with while rotating. With contact spread over the complete tooth the spiral bevel equipment can be run much faster compared to the straight tooth bevel gear and handle harder starts and stops.
We make spiral bevel gears only for industrial applications.
Worm gears are found in large gear reductions. Gear ratio ranges of 5:1 to 300:1 are usual. The setup was created so that the worm can turn the gear, spiral gear china however the gear cannot change the worm. The position of the worm can be shallow and consequently the gear is held in place due to the friction between your two. The equipment is found in applications such as for example conveyor systems in which 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 possess an inherent safety mechanism built-in to its design given that they cannot function in the invert direction.