Factors dialog box (Legacy ANSI)

The display in this window depends upon the option selected in the Method of Strength Calculation selection list in the Calculation tab of Spur Gears Component Generator. You must have the Legacy ANSI selected.

See Engineer's Handbook for calculation formulas on factors.

Access:

Ribbon: Design tab Power Transmission panel Spur Gear and on the Calculation tab, click Factors.

OK	Click to confirm the selection and close the dialog box.
Cancel	Closes the dialog box.
User Factors	Check the box to enter values manually.

Common Factors
Overload Factor K o	Overload Factor is intended to account for an occasional load of the nominal design load W t . It can be established from experience with the particular application. Otherwise use K o = 1. Click Factors... on the context menu to open Overload Factor dialog box where you can select the value.
Dynamic Factor K v	Dynamic Factor takes into account load increments due to internal dynamic effects.
Mounting Factor K m	Mounting Factor takes into account the influence of mounting accuracy, clearance, deflection, gears precision and so on.
Factors for Contact
Enters the values of contact factors. Click the arrows next to the edit fields to display tables for value selection.
Life Factor C li	Life Factor takes accounts for higher load capacity for a limited number of load cycles.
Reliability Factor C r	Reliability Factor accounts for the effect of the normal statistical distribution of failures found in materials testing.
Geometry Factor I	Geometry Factor relates to the shape of the tooth at the point of contact, the most heavily loaded point.
Factors for Bending
Enters the values of bending factors. Click the arrows next to the edit fields to display tables for value selection.
Load Factor C l	Load Factor C l = 1.0 for bending loads.
Gradient Factor C g	Gradient Factor reflects non-uniformity of material properties. It depends on tooth size.
Surface Factor C s	Surface Factor takes into account influence of surface finish.
Reliability Factor k r	Reliability Factor accounts for the effect of the normal statistical distribution of failures found in materials testing.
Temperature Factor k t	Temperature Factor accounts effect of temperature on oil film and material properties.
Mean Stress Factor k ms	Mean Stress Factor accounts for the influence of reversible load of teeth.
Geometry Factor J	Geometry Factor relates to the shape of the tooth at the point of contact, the most heavily loaded point.