Consistency is defined as the degree to which a plastic material resists deformation under the application of force. In the case of lubricating greases, this is a measure of the relative hardness or softness and has some relation to flow and dispensing properties. Consistency is measured by ASTM D 217, Cone Penetration of Lubricating Grease and is often reported in terms of NLGI grade.
Cone Penetration: Grease consistency is measured at 25°C / 77°F after the sample has been subjected to 60 double strokes in the ASTM grease worker. After the sample has been prepared, a penetrometer cone is released and allowed to sink into the grease under its own weight for 5 seconds. The depth the cone has penetrated is then read, in tenths of a millimeter.
The further the cone penetrates the grease, the higher the penetration result and the softer the grease. NLGI Grade: The NLGI (National Lubricating Grease Institute) has standardized a numerical scale for grease consistency based upon ASTM D 217 worked penetration ranging from 000 for semifluid to 6 for block greases. The most common In application and use, ingress of environmental contaminants is unfortunately a common reality that often adversely affects the mechanical stability of the grease. It is important that greases not only be developed to provide excellent structural stability in a pristine state, but also in the presence of environmental contaminants such as water, process fluids, or other contaminants. This can be assessed by means of laboratory bench tests operating in a variety of conditions with presence of water.
MANUFACTURING PROCESS OF GREASE OIL is not very complicated. For the production, there is need usable and tried a formulation, ingredients ( additives, base oils,foam agent, pour point depressant, etc. ) and process tank. For ingredients to be used, quantities to be used and ingredients usage rankings, you should look into this formulation and manufacturing process. Therefore, formulation and productıon process of COMPLEX GREASE OIL are important. If you have not a good formulation, you cannot make healthy and efficient production of any lubricating oils.
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