Bevel gears are classified in different types according to geometry:
Straight bevel gears have conical pitch surface and teeth are straight and tapering towards apex.
Spiral bevel gears have curved teeth at an angle allowing tooth contact to be gradual and smooth.
Zerol bevel gears are very similar to a bevel gear only
exception is the teeth are curved: the ends of each tooth are coplanar
with the axis, but the middle of each tooth is swept circumferentially
around the gear. Zerol bevel gears can be thought of as spiral bevel
gears (which also have curved teeth) but with a spiral angle of zero (so
the ends of the teeth align with the axis).
Hypoid bevel gears are similar to spiral bevel but the pitch surfaces are hyperbolic and not conical. Pinion can be offset above, or below,the gear centre,
thus allowing larger pinion diameter, and longer life and smoother mesh,
with additional ratios e.g., 6:1, 8:1, 10:1. In a limiting case of
making the "bevel" surface parallel with the axis of rotation, this
configuration resembles a worm drive. Hypoid gears were widely used in automobile rear axles.
![ZA/ZC1/ZC3/ZI/ZK/ZN worm wheel set]( "ZA/ZC1/ZC3/ZI/ZK/ZN worm wheel set")
https://en.wikipedia.org/wiki/Bevel_gear
Cabin Filter
Cabin Filter,Car Filter,Carbon Filter,Filter Replacement
PINGYUAN FILTER CO.,LTD , https://www.pingyuanfilters.com