IMS - Going with SKF hybrid

[Smallblock454]

I think there are more parameters than seal deterioration.

Type of bearing and capability to handle axial force, torsion and vibrations.
Type of cage.
Type of grease if you have a sealed one - heat resistancy.
Type of sealing and seal material.
Misalignment IMS and ISMB.
Rotation Per Minute / Friction inside the IMSB.
Amount of contamination the IMSB can handle. hc
Heat and heat cycles.
Maybe fast up and downcycling when motor revs up or down.

And again. If you have a bearing that was designed to run as a sealed bearing and you remove the sealing, you have no specification, because the bearing wasn't designed for that.

There are bearings that are designed to run in oil. These might be the right choice if you want to run an open bearing,

Regards, Markus