Oil foam creation

[airplaneman]

Does anyone have an information about oil foam and bubbles creation conditions due to lubrication of ball and/or roller bearings?

 

[25362]

Of the various Google sites concerned with foam and antifoaming additives this one may be helpful as a tutorial:

www.herguth.com/technical/PHYSICAL.HTM​

Non-aqueous foams are dealt with antifoam chemicals (lube oil additives). Those in the market are typically low solubility surfactants, such as the the popular polydimethylsiloxanes.
Among others we find fluorosilicones, polyalkoxyamines, polyethylene glycols (polyethers), branched polyvinyl ethers and alkoxylated aliphatic acids.

On foam stability and foam destruction I'm sure a previous thread discussed the subject.