Distance in radial direction between the pitch circle and the addendum circle
Distance in radial direction between the pitch circle and the root circle
Diameter of the pitch circle, namely of the theoretical circumference in which the transmission takes place without sliding
Ratio between the pitch diameter and the number of the teeth
Section of the portion of the tooth between the pitch circle and the addendum circle
Section of the portion of the tooth between the pitch circle and the root circle
Teeth parallel to the axis of rotation
Teeth oblique to the axis of rotation therefore with a more gradual meshing
A pair of cogwheels in which the crests of the teeth lie on the surface of an ideal cone in order to be in gear with a given angle between the axes of rotation
In the external toothing, the diameter of the circumference passing by the feet of the teeth
In the external toothing, the diameter of the circumference passing by the head of the teeth
Relationship between the deviation of the reference line of the generating toothing with respect to the primitive cutting and the module
Method for determining the thickness of the tooth starting from the direct measurement of the gauge
Direction of helix rotation, it is defined "right" if it rotates clockwise moving away from the observation point, it is defined "left" if it rotates anticlockwise
Median module for the determination of the pitch diameter
Diameter of the reference circumference for the construction of the involute profile of the tooth flanks
Set of heat treatments that are performed to particular types of steels and which consists of a hardening.
Surface finishing process aimed to restore the tooth to an optimal profile condition, that is to say involute.
It is a treatment on steel components which provides a surface enrichment of carbon which ensures an high hardness index
Helical cylindrical shaft with a large helix angle that is coupled to a cylindrical helical crown and ensures the transfer of the motion with a very high ratio