5 Attributes to Select the Right Grease for Your Equipment Needs
Looking at these 5 attributes for selecting the right type of grease for the equipment is crucial. Colour is definitely not one of these as there’s more to it than what meets the eye.
When it comes to grease, there is no such thing as “all-purpose” grease. Every single application requires a different type of oil and here we are discussing the 5 major attributes to look out for while choosing the grease for your equipment.
So the five attributes are summed up as follows:
1. NLGI Rating: The National Lubrication Grease Institute Rating is a criteria that determines the consistency of a grease, higher the rating, thicker the grease. The number is usually determined by the ratio of oil to the thickener in the grease. Low rated grease is helpful in cold climates as pumping is made easier whereas higher rated ones are more stable in hot climates.
2. Thickener: there are several additives in an oil, out of which, the thickener is the most important one. It acts as a ‘soap sponge’ that maintains the consistency of the oil and holds it in its place and then spreads across to lubricate all the components. Different types of grease are used for different thickening agents and all of them may not be compatible with each other.
3. Viscosity: Viscosity is yet another major characteristic of a lubricant and that holds true for greases. The grade shown in the container is the viscosity of oil within the grease that acts as a lubricant. When it comes to high speed applications, they generally use lighter viscosity grease.
4. Dropping Point: Dropping point is the operating temperature at which a grease is liquefied and does not perform. It is thus important to make use of a grease that remains constant within the maximum operating temperature of the application.
5. EP Additives: EP which stands for Extreme Pressure is a tag that is labelled under certain category of greases. These are common for various applications except electric motor bearings where it can cause corrosion if there is over greasing on part of motor windings.