Spiral bevel gears are usually made from hardened steel. One’s teeth of these gears are usually ground for a 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 requires a whole lot of torque after that spiral bevel gears are a great choice. The gears run at 90° to each other and have “spiral” shaped teeth which provides maximum tooth surface contact while rotating. With contact spread over the whole tooth the spiral bevel gear could be run much quicker than the straight tooth bevel gear and handle harder starts and stops.
We make spiral bevel gears limited to industrial applications.
Worm gears are used in large gear reductions. Gear ratio ranges of 5:1 to 300:1 are standard. The setup is designed to ensure that the worm can change 
the gear, but the gear cannot change the worm. The position of the worm is shallow and because of this the apparatus is held set up due to the friction between the two. The equipment is situated in applications such as for example conveyor systems in which the locking feature can act as a brake or an emergency stop.
The model cross-section shows a typical placement and usage of a worm gear. Worm gears possess an inherent protection mechanism built-in to its design since they cannot function in the invert direction.