When greasing bearings, the grease should be distributed evenly in the free space between the rolling elements and bearing rings. The bearings should be turned by hand until all internal surfaces are covered.
Small angular contact thrust ball bearings for screw drives often require very small quantities of grease. When a very small grease quantity has to be applied, the bearing should be immersed in a grease solution (3 to 5% grease in a solvent) first. After the solvent has drained and evaporated, grease can be applied. Immersing the bearing in a grease solution ensures that all surfaces are covered with a thin layer of the lubricant.