4.4 Bevel Gears. Bevel gears, whose pitch surfaces are cones, are used to drive intersecting axes. Bevel gears are classified accordingto their type of the tooth forms into Straight Bevel Gear, Spiral Bevel Gear, Zerol Bevel Gear, Skew Bevel Gear etc.The meshing of bevel gears means the pitch cone of two gears contact and roll with each other.
