There
is no truly "universal" grease
which can be applied to the multitude
of industrial, automotive and marine uses.
Certain top-quality modern greases can
satisfy up to 75% of these needs, but
for the other 25%, several different and
specific greases are necessary.
The choosing of a grease requires, detailed
technical information concerning use and
the know-how of a specialist.
The NLGI, "National
Lubricating and Grease Institute"
classes lubricating greases according
to their consistency. Consistency is
divided into "grades", represented
by the following numbers: 000, 00, 0,
1, 2, 3, 4, 5, 6 Each grade corresponds
to a range in which the consistency
of the grease should be situated, which
is determined by the penetration of
a cone into the grease. The result is
then expressed in 1/10 mm. The deeper
the penetration, the lower the number:
a NLGI 000 grease is thus less consistent
than a NLGI 2 and represents a high
degree of penetration.
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