What does dropping point mean on a grease tube?
It says operating range -30 to +350, dropping point 500 degrees.
Thanks
It says operating range -30 to +350, dropping point 500 degrees.
Thanks
Dropping Point
- Thread starter Riches139
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Droppoing point is the temp. at which a a grease turns from a plasitc solid state to a liquid state.
Rule of thumb. grease max usefullness is 50-100 under its dropping point.
Dropping point can be used to determine the thickner content of grease.
Rule of thumb. grease max usefullness is 50-100 under its dropping point.
Dropping point can be used to determine the thickner content of grease.
Literally, it's the point that the base oil that is encapsulated in the thickener begins to drip out.
Its when the thickener tends to seperate form the base oils,as most greases are 80% oil 20% thickener,,often happens in a grease gun,,or in storage,usallynormal unless the manuf, process does not chill the finished grease long enough,after the blending process......BL
Not to be too much of a stickler, but when you run the test, you watch for the temperature at which the first drop of oil falls from grease sample. Hence, "dropping point". It's not when the thickener separates from the oil.
http://www.koehlerinstrument.com/products/K19490.html
http://www.koehlerinstrument.com/products/K19490.html
Good point redlines,,,,I was refering to storage,when grease bleeds,,,,not in actual use where grease drops,or melts from heat which is from a given temp of the product,ASTM D-2265 which is one of the standards of dropping points of greases,that is NLGI 2 grade of ,which ASTM penetration test D-217 also play a part,in worked penetration at about 78-80 deg F,,,,,BL
Oil bleed is just a grease reality, with some exhibiting the tendency more that others. The oil is just encapsulated in the thickener "sponge" and, due to density differences, if a grease container surface is not flat (like when you dig some grease out of a pail), the oil naturally separates and partially fills the gaps in the surface. An example of a grease that does not exhibit this tendency is an industrial coupling grease that has had the density of the oil matched to the density of the thickener using a polymer.
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