The free online calculations had been updated and can now be used on mobile devices too. The calculations can either be used embedded in this website or as standalone calculation. The later should be prefered for mobile devices.

Calculation of Hertzian contact stress for point and line contact Embedded Standalone
Calculation of fits according to ISO 286 Embedded Standalone
Calculation of geometry data for helical gears according to ISO 21771 Embedded Standalone
Calculation of load distribution within a deep groove ball bearing Embedded Standalone

The functionality of the calculation was not changed. The layout was adjusted to the current website and scaling was improved for mobile devices.