Lubricating greases

Lubricating greases

APPLICATION

Plastic grease is essential in applications where standard oils fail to provide sufficient lubrication or protection:

• High temperature / pressure / slow speed In conditions that are adverse for hydrodynamic mode, for machine start-up, for impacts and change of load in the bearing.
• Avoid oil spraying Where spraying of bearing must be avoided.
• Extreme temperature changes When for extreme change of temperatures.
• Long-term lubrication When lubrication must be provided for longer time without supervisor or operator.
• Protection from contaminants When bearing must be protected from water, solvents, dust, impurities, chemicals.
• Stay on pivot Where grease must stay on the pivot even when the machine does not move.
• Machine part protection Where grease shall also preserve the machine part.

CLASSIFICATION OF PLASTIC GREASE

NLG#	ASTM-Worked Penetration	Food Analogy
000	445–475	Ketchup
00	400–430	Applesauce
0	355–385	Brown Mustard
1	310–340	Tomato Paste
2	265–295	Peanut Butter
3	220–250	Vegetable Shortening
4	175–208	Frozen Yogurt
5	130–160	Smooth Paté
6	85–115	Cheddar Cheese Spread

CALCULATING THE SPEED FACTOR

Grease type	Base oil viscosity (40 °C)	Speed factor (NDM)
Slow-speed, high-pressure, industrial grease	1.000 – 1.500 cSt	50.000
Medium-speed high-pressure industrial bearing grease	400 – 500	200.000
EP, NLGI #2, multi-purpose grease	100 – 220	100.000 – 200.000
High-speed, high-temperature long-life grease	<70	600.000
High-speed, long-life grease	15 – 32	>1.000.000