​ is not only the supplier of Royal Purple high quality lubricants but also it should be considered as a technical resource for the operations of your equipment.

Wear occurs when the oil film between the rolling elements and the race is insufficient.

This results in metal contact with the main effect leading to a reduction in the life of the bearing.

The thickness of the oil film is mainly dependent on the circumferential speed of the bearing and the viscosity of the oil operating temperature.

You must keep in mind that when the temperature increases, the viscosity of the oil decreases.

The oil film thickness must be at least equal to 2 times the roughness of the metal surface.

Typical roughness for rolling element bearings is less than 0.5 microns (0.02 milli inch)

Fatigue is not only a result of contact between races and rolling elements. In the load zone of the bearing, immense pressure, called Hertzian Pressure, is generated at the interface between the rolling element and the race. In this area the lubricant becomes pseudo-solid (similar to a glass film) and the metal deforms. This high pressure propagates inside the metal. Once the rolling element leaves the load zone, the metal surfaces from the rolling element and the race recover their original shape and the oil becomes fluid again. This type of lubrication is called Elasto-Hydrodynamic Lubrication, or EHL for short. The repetitive passage of rolling elements in the load zone will ultimately create subsurface cracks. To slow down the fatigue process, a heavy viscosity oil can help by increasing the width of the interface between the rolling element and the race.

The additives present in the oil can reduce the roughness of the metal surface and decrease wear and fatigue. The presence of acidic additives and water in the oil increase the rate of propagation of the cracks in the metal by corroding the metal and weakening the bonds between atoms.

LENCO markets Royal Purple High Performance Synthetic oils and greases. Compared to mineral oils, synthetic lubricants do not change of viscosity as much with a change of temperature.

At operating temperature, the oil film generated by a synthetic oil will likely be a lot thicker than a mineral oil. But at an initial phase, the synthetic oil is still fluid enough to provide an immediate protection of the moving parts.

Royal Purple oils, for example Synergy gear oil and Synfilm™ circulation oil and Ultra Performance grease, contain outstanding anti-wear additives like: Synslide™ and Synerlec™. Those additives score very high marks in international wear protection tests. Synslide™ and Synerlec™ are noncorrosive at the difference of most Extreme Pressure additives.