Applying the Right Grease
Now suppose that you have selected grease for a particular type of application, but then how would you decide how much grease is to be put. Putting the exact amount of grease is very important as applying improper quantity of grease is equal to not putting anything.
Also, excessive grease is dangerous as it leads to over heating of the rubbing parts. More the grease, more it will interfere with the moving parts, raising the temperature of that particular area. So what to do?
However, the basic rule that should be followed while applying grease is that though the bearings should be filled completely with grease, the free space in the housing should be filled partially. This left out space gives space to the grease to be ejected from the bearing when the moving part starts rotating. Moreover, a type of grease is also available that can be filled completely into the housing without allowing the temperature to rise. This grease is generally formed of lithium soap and has great stability even at high temperatures. This grease is helpful in applications where there are chances of impurities to enter the bearing.
Bearings can be divided into mainly two types – separable and non separable. No matter what type of bearing it is, the general practice is to fill up the spaces inside the inner race, outer race and the rolling components on each side of the bearing.
However, for re-lubrication the following formula should be followed.
G = 0.0005 DB
- G is the quantity of grease in grams
- D is the diameter of bearing
- B is the total breadth width of the bearing
Applying grease using this formula ensures that the grease remains at the rubbing surfaces for a longer time without coming off.