One of a pair of gears used to connect two shafts whose axes intersect,and the pitch surfaces are cones.
Teeth are cut along the pitch cone. Depending on tooth trace,bevel gear is classified as:
1) Straight bevel gears, or
2) Spiral bevel gear.
1) Straight bevel gear
A simple form of bevel gear having straight teeth which,if extended inward,would come together at the
intersection of the shaft axes.
What are the features of Straight bevel gear?
Relatively easy to manufacture.
Provides reduction ratios up to approx. 1:5.
What are the applications of Straight bevel gear?
Machine tools,printing presss,etc. Especially suitable for use as a differential gear unit.
2) Spiral Bevel Gear
Bevel gear with curved,oblique teeth to provide gradual engagement and larger contact surface at a given time
than an equivalent straight bevel gear.
What are the features of spiral bevel gear?
Has higher contact ratio,higher strength and durability than an equivalent straight bevel gear.
Allows a higher reduction ratio.
Has better efficiency of transmission with reduced gear noise.
Involves some technical difficulties in manufacturing.
What are the application of spiral bevel gear？
Automobiles,tractors,vehicles,final reduction gearing for ships. Especially suitable for high-speed,heavy load drives.
