Spiral bevel gears are usually 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 hand or right hand depending on the direction you have to run the gears
If you have a higher speed application that will require a lot of torque after that spiral bevel gears are a great choice. The gears operate at 90° to one another and have “spiral” shaped tooth which provides spiral gear china maximum tooth surface contact 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 gear and handle harder starts and stops.
We make spiral bevel gears only for industrial applications.
Worm gears are used in large equipment reductions. Gear ratio ranges of 5:1 to 300:1 are regular. The setup was created so that the worm can turn the gear, but the gear cannot change the worm. The position of the worm is certainly shallow and as a result the apparatus is held set up because of the friction between the two. The gear is found in applications such as conveyor systems where the locking feature can become a brake or a crisis stop.
The model cross-section shows an average placement and use of a worm gear. Worm gears have got an inherent basic safety mechanism built-in to its style since they cannot function in the reverse direction.