worm wheel

Worm gears are usually used when large rate reductions are needed. The reduction ratio is worm wheel china determined by the number of starts of the worm and quantity of tooth on the worm equipment. But worm gears possess sliding get in touch with which is tranquil but will produce heat and also have relatively low transmission efficiency.
As for the materials for creation, in general, worm is constructed of hard metal as the worm gear is made from relatively soft metal such as for example aluminum bronze. That is since the number of tooth on the worm gear is relatively high compared to worm using its number of begins being generally 1 to 4, by reducing the worm equipment hardness, the friction on the worm tooth is reduced. Another feature of worm manufacturing is the need of specialized machine for gear trimming and tooth grinding of worms. The worm equipment, on the other hand, may be made with the hobbing machine used for spur gears. But because of the various tooth shape, it is not possible to cut many gears at once by stacking the gear blanks as can be carried out with spur gears.
The applications for worm gears include equipment boxes, fishing pole reels, guitar string tuning pegs, and in which a delicate acceleration adjustment by utilizing a big speed reduction is necessary. When you can rotate the worm equipment by worm, it is generally not possible to rotate worm by using the worm gear. That is called the self locking feature. The self locking feature cannot always be assured and another method is recommended for accurate positive reverse prevention.