<><><>Electrical erosion is a relatively common occurrence with bearings operating in electric motors, railway traction motors, electrical generators as well as bearings in industrial process equipment where a static electrical charge may inadvertently be generated. Conventional lubricating greases behave largely as electrical insulators rather than electrical conductors within the bearing offering resistance to the transfer of electrical energy. Irregular electrical transfer however does occur resulting in the development of spasmodic electrical arcing across the bearing hertzian contact points. Molten craters are formed at these points resulting in the development of the classical "washboard" line markings clearly seen.
Such electrical erosion damage can be prevented by use of Kluberlectric B42-72, a tribologically engineered electrically conductive special grease.
This "optimised" grease formulation has an exceptionally low electrical resistance. This leads to efficient electrical transfer, and hence to damage-free electrical discharge through the bearing.
Kluberlectric B42-72 can eliminate costly machine failure by prevention of electrical erosion bearing damage.
One recent example of such erosion occurred in a Cement Mill Separator, where electric motor bearings were previously lubricated with a standard Lithium Mineral oil based EP2 grease. Electrical erosion damage occurred as a result of voltage discharge through the bearing. The bearing became extremely noisy with vibration levels increasing dramatically. ( above picture shows actual erosion damage clearly visible on the bearing outer ring raceway)
Kluberlectric B42-72 a was applied to the bearings and since the changeover the lowest recorded vibration noise floor levels were recorded signifying reduced metal to metal contact within the bearings.
"Previously electrical currents attacked the motor bearings now they are being safely conducted away"
Site Reliability Engineer
Dry lubrication of load rollers at high temperatures
Is it possible to combine the benefits of long-term lubrication with dry, non-dripping lubrication? The answer is clearly a yes. A new type of lubricating compound allows different applications in rolling bearings and is especially suitable for lubrication at high and extremely high temperatures. Results obtained from test rigs and field trials have proven the feasibility of long-term lubrication with very low wear, while at the same the environment is hardly affected. These are advantages that make this dry compound very attractive for conveyor operators, for applications in steelworks but also for kiln cart bearings or automatic baking ovens.
Molten craters are formed at these points resulting in the development of the classical "washboard" line markings clearly seen. 
Kluberlectric B42-72 a was applied to the bearings and since the changeover the lowest recorded vibration noise floor levels were recorded signifying reduced metal to metal contact within the bearings. 
Is it possible to combine the benefits of long-term lubrication with dry, non-dripping lubrication? The answer is clearly a yes. A new type of lubricating compound allows different applications in rolling bearings and is especially suitable for lubrication at high and extremely high temperatures. Results obtained from test rigs and field trials have proven the feasibility of long-term lubrication with very low wear, while at the same the environment is hardly affected. These are advantages that make this dry compound very attractive for conveyor operators, for applications in steelworks but also for kiln cart bearings or automatic baking ovens.