Rolling contact fatigue strength

Symbol σHlimN
Unit N/mm²
Attribute-ID stplus_result_vdi_2736_2014_rolling_contact_fatigue_strength
Numeric ID 10023
Value Type PMTechValue

When "acc. to VDI 2736:2014" is selected σHlimN is determined using the tooth root temperature and the available number of load cycles for selected materials:

Material designation Type of lubrication Calculation from the equations in VDI 2736 for
PA66 Oil mist / oil circulation PA 66 - oil lubrication
PA66 Grease PA 66 - grease lubrication
PA6 Oil mist / oil circulation PA 6 - oil lubrication
PA6 Grease PA 6 - grease lubrication
PBT Oil mist / oil circulation PBT - oil lubrication
PBT Grease PBT - grease lubrication
Laminates all types Coated press materials (Hgw)

To ensure that the internal calculation for the material is correctly controlled, the material designation must correspond exactly to the value in the above table.

When "from measurement data" is selected,  σHlimN is determined using the specified measurement data and the existing number of load cycles.

When "from material" is selected, the value for σHlimN for the material is used.