worm wheel

Worm gears are often used when large velocity reductions are needed. The reduction ratio depends upon the number of begins of the worm and amount of teeth on the worm gear. But worm gears have sliding contact which is silent but will produce heat and have relatively low transmission efficiency.
For the materials for production, in general, worm is made of hard metal while the worm gear is made from relatively soft metal such as aluminum bronze. That is because the number of the teeth on the worm equipment is relatively high compared to worm with its number of starts being usually 1 to 4, by reducing the worm gear hardness, the friction on the worm tooth is reduced. Another feature of worm worm wheel china manufacturing is the need of specialized machine for gear cutting and tooth grinding of worms. The worm gear, however, may be made out of the hobbing machine utilized for spur gears. But because of the various tooth shape, it is not possible to cut many gears at once by stacking the apparatus blanks as can be done with spur gears.
The applications for worm gears include gear boxes, fishing pole reels, guitar string tuning pegs, and where a delicate rate adjustment by utilizing a sizable speed reduction is necessary. When you can rotate the worm equipment by worm, it is normally extremely hard to rotate worm by using the worm gear. This is called the personal locking feature. The self locking feature cannot continually be assured and another method is recommended for true positive reverse prevention.