Aim: To abide by out the consistency of given sample of grease.
What is Consistency of Grease?
- Measure of relative hardness of grease is referred as consistency number as per N.L.G.I (National Lubricating Grease Institute) which is a merchandise association that governs lubrication as well as related manufacture research.
What is Grease?
Influenza A virus subtype H5N1 Semi-fluid lubricant made of base of operations crude as well as thickener.
Application of Grease
Grease is used where continuous provide of crude cannot last retained/possible. e.g. Such every bit ball as well as roller bearings, chassis components of automobiles, chains of mechanisms.
Ingredients of Grease
Grease unremarkably made upwardly of next components:
- Base Oil : Normally mineral oil, synthetic fluid human activity every bit base of operations crude which is virtually 70-95% inward grease content. Low temperature application requires base of operations crude amongst depression viscosity spell heat grease need high viscid grease.
- Additive : Simple lather amongst calcium, lithium as well as sodium every bit ingredients, complex soap, Additives are 0-10% inward grease content. Additives inward grease are used to elevate performance besides every bit gives color to grease.
- Thickener: Used to thicken the grease contents. Thickener are of 5-20% or 5-30% of grease content.
Grease Penetrometer is a exam apparatus which measures penetration which is a stair out of the consistency of grease.
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| Cone Grease Penetrometer Apparatus |
Grease Penetration number is the depth inward 10th of millimeter to which prescribed weighted cone sinks into the grease sample.
Higher the penetration number, softer the grease as well as lower the penetration number, harder the grease.
Reference: ASTM D217