| Symbol | khap |
|---|---|
| Unit | - |
| Attribute-ID | basic_crown_gear_addendum_factor_iso23509_2016 |
| Numeric ID | 17283 |
| Value Type | PMDouble |
The basic crown gear addendum factor khap is defined on the basic rack tooth profile and determines the mean tooth depth. By default, it has the value khap= 1.0. As the basic crown gear addendum factor khap increases, the profile contact ratio increases, but the thickness of the addendum decreases and may result in pointed teeth.
Together with the basic crown gear dedendum factor khfp, profile shift coefficient xhm1 and theoretical thickness modification coefficient xsmn, it describes the tooth profile according to data type I in ISO 23509 (according to European standards). The dimensionless factors are related to the mean normal module mmn.