Worm gears are often used when large acceleration reductions are needed. The decrease ratio is determined by the number of begins of the worm and quantity of the teeth on the worm gear. But worm gears have sliding get in touch with which is tranquil but will produce heat and have relatively low transmission efficiency.
As for the materials for production, in general, worm is made from hard metal while the worm gear is manufactured out of relatively soft metal such as for example aluminum bronze. This is since the number of teeth on the worm gear is relatively high compared to worm with its number of begins being usually 1 to 4, by reducing the worm equipment hardness, the friction on the worm tooth is reduced. Another characteristic of worm manufacturing is the need of specific machine for gear trimming and tooth grinding of worms. The worm gear, on the other hand, may be made out of the hobbing machine used for spur gears. But because of the different tooth shape, it isn’t possible to cut a number of gears simultaneously by stacking the gear blanks as can be done with spur gears.
The applications for worm gears include equipment boxes, fishing pole reels, guitar string tuning pegs, and where a delicate speed adjustment by utilizing a huge speed reduction is needed. While you can rotate the worm gear by worm, it is generally not possible to rotate worm utilizing the worm gear. This is called the personal locking feature. The self locking feature cannot continually be assured and another worm wheel china method is recommended for true positive reverse prevention.