A
high pressure (> 100,000 psi), extreme temperature (-150 -900 deg F)
dry
lubricant. Generally, this is used in applications where either traditional
lubricants do not work, or where the
film strength of the base lubricant
is not adequate to prevent contact or
galling.
"Moly-D" is most frequently encountered as an additive for grease used in
the bearings of disk brake fitted wheels. As a dry lubricant (with
typical particle size in the 1-5 micron range) it is often delivered in a suspension, and may be used in locks, bicycles, or in applications where
good lubrication is needed and oil would bind too much foreign matter.
Use with caution as this is a sufficiently good lubricant that it can
prevent friction locking mechanisms from operating correctly.
Graphite has similar uses and is far less expensive, making it a better
choice where the high performance characteristics of "Moly-D" are not required.