Factors dialog box (CSN)

Access:

Ribbon: Design tab Power Transmission panel Worm Gear and on the Calculation tab, select CSN from the pull-down list in the Method of Strength Calculation area. Click Factors.

OK	Confirms the selection and closes the dialog box.
Cancel	Closes the dialog box.
User Factors	Click the check box to enter values manually.

Factors of Additional Load
Application Factor K A	Application factor takes account of dynamic overloads from sources external to the gearing. Click Factors... on the context menu to open Application factor dialog box where you can select the value.
Dynamic Factor K Hv	Dynamic Factor for contact takes into account load increments due to internal dynamic effects.
Dynamic Factor K Fv	Dynamic Factor for bending takes into account load increments due to internal dynamic effects.
Face Load Factor K Hβ	Face Load Factor for contact takes into account uneven distribution of load over the facewidth, due to mesh misalignment caused by inaccuracies in manufacture, elastic deformations, and so on. Click behind the edit fields to open the Kinematic diagram dialog box where you can select the value.
Face Load Factor K Fβ	Face Load Factor for bending takes into account uneven distribution of load over the facewidth, due to mesh misalignment caused by inaccuracies in manufacture, elastic deformations, and so on. Click behind the edit fields to open the Kinematic diagram dialog box where you can select the value.
Transverse Load Factor K Hα	Transverse load Factor for contact takes into account uneven load distribution in the transverse direction resulting, for example from pitch deviation.
Transverse Load Factor K Fα	Transverse load Factor for bending takes into account uneven load distribution in the transverse direction resulting, for example from pitch deviation.
One-time Overloading Factor K AS	One-time Overloading Factor takes into account maximal one-time overload of gear.
Factors for Contact
Zone Factor Z H	Zone Factor accounts for the influence on the Hertzian pressure of the tooth flank curvature at the pitch point.
Contact Ratio Factor Z ε	Contact Ratio Factor accounts for the influence of the transverse contact ratio and the overlap ratio on the specific surface load of the gears.
Life Factor Z N	Life Factor takes account of a higher permissible Hertzian stress if only limited durability is demanded.
Lubricant Factor Z L	Lubricant Factor accounts for the influence of the lubricant viscosity.
Velocity Factor Z v	Velocity Factor accounts for the influence of pitch line velocity.
Factors for Bending
Form Factor Y F	Form Factor takes into account the influence on nominal tooth-root stress, of the tooth form with load applied at the tooth tip.
Helix Angle Factor Y β	Helix Angle Factor takes into account influences of the helix angle, such as the variation of the load along the lines of contact.
Contact Ratio Factor Y ε	Contact Ratio Factor accounts for the influence of the transverse contact ratio and the overlap ratio on the specific surface load of the gears.
Alternating Load Factor Y A	Alternating Load Factor accounts for the influence of reversible load of teeth.
Life Factor Y N	Life Factor takes account of a higher permissible Hertzian stress if only limited durability is demanded.
Size Factor Y X	Size Factor accounts for the influence of the tooth dimensions on tooth bending strength.

Tip: See the Engineer's Handbook for factors calculation formulas.