Downupsides point is well taken.
Swashplate bearing temperature in normal conditions may vary according to design.
Info on the one monitoring system I have access to ( but it is the original 92 manual, so subject to later changes ), is as follows. The bearing monitor system provides a caution " S/P Temp Detect " caution when the bearing temp is 100F over ambient. EP is to land as soon as practical. The system also has a "S/P Temp Limit " warning, triggered by a bearing temp ( straight, raw temp ) of 300F, and the EP is to land as soon as possible.
Not to restart old discussions, but this is a single point failure mode that has proven to be susceptible to Mfgr/QA error.