Influence of Cage Clearance on Bearing Lubrication©

Figures & data

FIG. 1 Example of a nylon cage.

FIG. 2 EHL test device and cage position.

FIG. 3 Cage support and mechanism for changing the clearance.

TABLE 1 EHL Test Conditions

Max. Hertz pressure	0.48 GPa
Speed range	0.01-0.5 m/s
Temperature	25-26°C
Cage type	Nylon
Ball diameter	14.2 mm
Cage clearance (nominal)	0.025-0.5 mm

FIG. 4 Film thickness results without a cage for grease and base oil (Grease 1 = without scoop, Grease 2 = with scoop).

FIG. 5 Film thickness results for the base oil with the cage present. Four different clearances (0.5 mm, 0.35, 0.2 mm, 0.05 mm) and fully flooded (line).

FIG. 6 Film thickness results for the grease with the cage present. Four different clearances (0.5 mm, 0.35, 0.2 mm, 0.05 mm) and fully flooded (line).