worm wheel

Worm gears are usually used when large rate reductions are needed. The reduction ratio depends upon the number of starts of the worm and amount of teeth on the worm gear. But worm gears have sliding contact which is quiet but tends to produce heat and also have relatively low transmission effectiveness.
As for the materials for production, in general, worm is constructed of hard metal as the worm gear is made from relatively soft metallic such as for example aluminum bronze. This is since the number of teeth on the worm gear is relatively high in comparison to worm using its number of begins being usually 1 to 4, by reducing the worm gear hardness, the friction on the worm teeth is reduced. Another feature of worm manufacturing is the need of specialized machine for gear reducing and tooth grinding of worms. The worm gear, on the other hand, may be made out of the hobbing machine utilized for spur gears. But due to the various tooth shape, it isn’t possible to cut many gears simultaneously by stacking the gear blanks as can be carried out with spur gears.
The worm wheel china applications for worm gears include gear boxes, fishing pole reels, guitar string tuning pegs, and where a delicate acceleration adjustment by utilizing a huge speed reduction is necessary. When you can rotate the worm gear by worm, it is generally not possible to rotate worm utilizing the worm gear. That is called the personal locking feature. The self locking feature cannot always be assured and another method is preferred for accurate positive reverse prevention.