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March 11, 2020

Worm gears are usually used when large velocity reductions are needed. The reduction ratio is determined by the number of starts of the worm and number of teeth on the worm equipment. But worm gears have sliding contact which is peaceful but tends to produce heat and 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. This is because the number of tooth on the worm gear is relatively high in comparison to worm with its number of starts being usually 1 to 4, by reducing the worm equipment hardness, the friction on the worm the teeth is reduced. Another characteristic of worm manufacturing may be the need of specialized machine for gear slicing 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 different tooth shape, it is not possible to cut several gears at once 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 in which a delicate quickness adjustment by utilizing a big speed reduction is necessary. While you can rotate the worm equipment by worm, it is usually extremely hard to rotate worm by using the worm gear. This is called the self locking feature. The self locking feature cannot always be assured and a separate method is preferred for true positive reverse prevention.

Also there is duplex worm gear type. When working with these, you’ll be able to change backlash, as when one’s teeth put on necessitates backlash adjustment, without needing a change in the guts distance. There aren’t too many producers who can produce this kind of worm.

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