You can make corrections to the theoretical involute (profile modification). The type of profile modification has an impact on the calculation of the scoring safety. The Distribution factor (or Force Distribution factor) XGam is calculated differently depending on the type of profile modification. There is a significant difference between cases with and without profile correction. The difference between profile correction ’for high load capacity’ gears and thise ’for smooth meshing’ however is not so important. The calculation procedure requires that the Ca (of the profile correction) is sized according to the applied forces, but does not indicate an exact value.