Bestgrease for electric motor bearings

How Often Should Bearings Be Greased? Bearings should be lubricated at an average frequency as found in Table 3. Operational environment and type of grease may require more frequent lubrication.

What type ofgrease for electric motor bearings

Q) Is it important to know station codes while checking the time table of Dr. Ambedkar Nagar - Kamakhya Express (19305)?

Q) How can I check the correct platform number & halt time of the Dr. Ambedkar Nagar - Kamakhya Express (19305) train at different stations?

While the overall announcements of updated railway train timetable are typically announced during the Sep-Oct month of every year, railway train time table/station time table also change during the year. It is important to frequently keep checking rly time table for any changes during the entire year.

Electric motor greaseChart

Trains can arrive at a station earlier than the scheduled arrival time as per Indian railway time table, but per strict rules they cannot depart earlier than the scheduled departure time as prescribed in Indian train time table.

Electric motor greasetype

Our experience in our facility along with industry research involving grease manufacturers, bearing manufacturers, motor manufacturers, our industry’s technical association, and engineering companies input can shed some light on this plight. The major problems are the type of grease, the proper application of the grease, and the frequency of application.

Smallelectric motorlubrication

Priest Electric offers a bearing maintenance workshop at your plant or at our shop that goes into much more detail on bearing maintenance, contact your salesman or call our shop. Permanent, absolute bearing protection has a greater effect on motor life than any other decisions made in specifying, equipping, and caring for electric motors_ Keeping bearings lubricated with the right amount of clean, uncontaminated, high quality lubricant allows bearings in most industrial motors to outlast all other components.

In multiple stoppage sections of the train, train time table has substantial time buffer included as part of train schedule time table. This allows train to recover time if running in a delayed fashion.

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Trains may or may not halt at a station as per the scheduled halt time as prescribed in the railway time table. In other words, trains can depart from a station before the scheduled halt time as per the railway timetable - provided they are not leaving the station before the scheduled departure time as per the railway time table.

As mentioned above, over greasing is a bigger problem than under greasing. Too much grease can act as insulation and overheat the bearing causing premature failure. It can also can move into the motor and contaminate the windings causing expensive repairs. Attached is a compatibility and frequency guideline to help you in your lubrication needs,

** Please note that this information is meant to only serve as a guideline for grease compatibility and lubrication frequency. If you have any questions contact Priest Electric at 1-800-234-4089 before changing products or frequency in the field **

Probably the least understood part of the problem is the grease itself. Grease is approximately ninety percent oil and ten percent thickener. The oil does the lubricating and the thickener keeps the oil in place, picture a sponge holding oil. The problem arises when you mix greases which have different thickeners. The most common thickener or base used in today’s electric motor bearings has a polyurea base. Motors come from the factory with a NLGI-2 Polyurea grease like Chevron SRI-2 or Mobil Polyrex EM. Also whenever you purchase shielded or sealed bearings from bearing manufacturers they almost always come with Polyrex EM in them unless you specify something special. The most common grease used by maintenance departments has a lithium base. Polyurea and Lithium don’t like each other, when mixed, the grease can become pure oil and flow into the motor, leaving no lubrication for the bearing. This explains why we sometimes see motors which are full of oil, the bearings have failed and the user says there is no oil anywhere near that motor. Remember the old cowboy adage “never mix gunpowder and alcohol, cause you can’t shoot it and it tastes terrible” Be sure you know which types of grease your plant uses and know which ones are compatible with one another.

Pillow block bearings, DC motors, couplings, and some crane motor manufacturers may use a different grease (usually a Lithium base), so be careful not to mix them. Also identical motors running in an Arizona copper mine may require different lube than in the artic circle. Also in the food processing industry the most important property of lubricants is that they won’t poison you if they somehow get into the food being processed.

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For some trains, it is observed that IRCTC time table are different from what is prescribed in main Indian Railway Time Table. Travelers are suggested to double check.

It is recommended that the type of grease used on each motor is recorded in order to avoid premature bearing failure. In many cases, you may be able to standardize the type of grease used in the majority of your motors. It is also good practice to let your motor repair center know the type of grease used in a majority of your motors. It is also good practice to let your motor repair center know the type of grease in case the standard grease used by the repair center conflicts with your standard grease.