Worm gears are often used when large rate reductions are needed. The reduction ratio is determined by the number of starts of the worm and number of tooth on the worm gear. But worm gears have sliding contact which is calm but will produce heat and also have relatively low transmission effectiveness.

As for the materials for production, in general, worm is made from hard metal while 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 with its number of begins being generally 1 to 4, by reducing the worm equipment hardness, the friction on the worm the teeth is reduced. Another feature of worm manufacturing may be the need of specific machine for gear reducing and tooth grinding of worms. The worm gear, however, may be made with the hobbing machine used for spur gears. But due to 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 equipment boxes, angling pole reels, guitar string tuning pegs, and where a delicate quickness adjustment by utilizing a big speed reduction is needed. While you can rotate the worm gear by worm, it is generally not possible to rotate worm by using the worm gear. This is called the personal locking feature. The self locking feature cannot always be assured and a separate method is preferred for true positive reverse prevention.

Also there exists duplex worm gear type. When using these, you’ll be able to change backlash, as when the teeth wear necessitates backlash adjustment, without needing a change in the guts distance. There are not too many producers who can generate this type of worm.

While others have actually discussed the subject of Worm wheel gear, my hope is that this write-up brings a special point of view.